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TK119xx
VOLTAGE REGULATOR WITH RESET OUTPUT FEATURES
s s s s s s s s s Very Low Dropout Voltage Reset Output for Microprocessor Very Low Quiescent Current (No Load) Internal Thermal/Overload Shutdown Low Noise Voltage Input and Output Voltage Sense 2.5 % Output Voltage Accuracy CMOS or TTL On/Off Control High Speed On/Off Transient (50 s typ.)
FEATURES
s s s s s s s s s Battery Powered Systems Cellular Telephones Pagers Personal Communications Equipment Portable Instrumentation Portable Consumer Equipment Radio Control Systems Toys Low Voltage Systems
DESCRIPTION
The TK119xx series are low power, linear regulators with built-in electronic switches. Built-in voltage comparators provide a reset logic "low" level whenever the input or output voltage falls outside internally preset limits. The internal electronic switch can be controlled by CMOS or TLL levels. The device is in the "off" state when the control pin is biased "high". An internal PNP pass-transistor is used in order to achieve low dropout voltage (typically 200 mV at 50 mA load current). The device has very low quiescent current (130 A) in the "on" mode with no load and 2 mA with 30 mA load. The quiescent current is typically 4 mA at 60 mA load. The current consumption in the "off" mode is 65 A. An internal thermal shutdown circuit limits the junction temperature to below 150 oC. The load current is internally monitored and the device will shut down (no load current) in the presence of a short circuit at the output. The output noise is very low at 100 dB down from VOUT when an external noise bypass capacitor is used. The TK119xx is available in a miniature SOT-23L surface mount package.
VIN
TK119xx
NOISE BYPASS
01 S
VIN GND
CONTROL RESET OUTPUT
VOUT
BLOCK DIAGRAM
VOUT RESET OUTPUT
ORDERING INFORMATION
CONTROL
SHUT DOWN
THERMAL PROTECTION
ERROR DETECTION
TK119
M
Tape/Reel Code Voltage Code
BANDGAP REFERENCE
VOLTAGE CODE
22 = 2.25 V 27 = 2.75 V 30 = 3.00 V 32 = 3.25 V 35 = 2.5 V 40 = 4.0 V 48 = 4.8 V 50 = 5.0 V
TAPE/REEL CODE
TL: Tape Left
NOISE BYPASS GND
January 1999 TOKO, Inc.
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TK119xx
ABSOLUTE MAXIMUM RATINGS
Supply Voltage ......................................................... 17 V Operating Voltage Range ............................... 1.8 to 16 V Power Dissipation (Note 1) ................................ 400 mW Storage Temperature Range ................... -55 to +150 C Operating Temperature Range ...................-30 to +80 C Junction Temperature .......................................... 150 C Lead Soldering Temperature (10 s) ..................... 235 C
TK11922 ELECTRICAL CHARACTERISTICS
Test conditions: VIN = 3.25 V, CL = 10 F, CN = 0.01 F, TA = 25 C, unless otherwise specified. SYMBOL IQ IGND ISTBY VOUT VDROP IOUT Line Reg PARAMETER Quiescent Current Ground Current Standby Current Output Voltage Dropout Voltage Output Current Line Regulation VIN = 3.25 to 12.25 V IOUT = 1 to 80 mA 5 20 0.2 f = 400 Hz, CL = 10 F 10 Hz f 100 kHz, CL = 10 F, CN = 0.01 F 68 50 VOUT x 0.95 -4 IFLAG = 100 A VDET 0.2 +4 0.4 TEST CONDITIONS IOUT = 0 mA VIN = 1.25 V, IOUT = 0 mA IOUT = 60 mA Output OFF IOUT = 1 mA, TA = 25 C IOUT = 1 mA, -30 TA 80 C IOUT = 30 mA 2.17 2.13 MIN TYP 140 380 2.5 95 2.25 2.25 160 MAX 300 900 10 160 2.33 2.37 350 100 50 100 UNITS A A mA A V V mV mA mV mV mV/ C dB Vrms V % V
Load Reg Load Regulation VOUT /T RR VNO VDET VDET(ERR) VRESET Temperature Coefficient Ripple Rejection Output Noise Voltage Low Voltage Detector Threshold Voltage Detector Threshold Tolerance Saturation Voltage
CONTROL TERMINAL SPECIFICATIONS ICONT VCONT(ON) VCONT(OFF) TR Control Terminal Current Control Voltage (ON) Control Voltage (OFF) Output Rise Time (OFF to ON) VCONT = 5 V VCONT = 16 V Output ON Output OFF IOUT = 30 mA, CL = 0.1 F, CN = 0.1 F 2.2 50 25 45 100 150 0.6 A A V V s
Note 1: Power dissipation is 400 mW when mounted as recommended. Derate at 3.2 mW/C for operation above 25C.
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TK119xx
TK11927 ELECTRICAL CHARACTERISTICS
Test conditions: VIN = 3.75 V, CL = 10 F, CN = 0.01 F, TA = 25 C, unless otherwise specified. SYMBOL IQ IGND ISTBY VOUT VDROP IOUT Line Reg PARAMETER Quiescent Current Ground Current Standby Current Output Voltage Dropout Voltage Output Current Line Regulation VIN = 3.75 to 12.75 V IOUT = 1 to 80 mA 5 20 0.2 f = 400 Hz, CL = 10 F 10 Hz f 100 kHz, CL = 10 F, CN= 0.01 F 68 50 VOUT x 0.95 -4 IFLAG = 100 A VDET 0.2 +4 0.4 TEST CONDITIONS IOUT = 0 mA VIN = 1.75 V, IOUT = 0 mA IOUT = 60 mA Output OFF IOUT = 1 mA, TA = 25 C IOUT = 1 mA, -30 TA 80 C IOUT = 30 mA 2.67 2.63 MIN TYP 140 380 2.5 95 2.75 2.75 160 MAX 300 900 10 160 2.83 2.87 350 100 50 100 UNITS A A mA A V V mV mA mV mV mV/ C dB Vrms V % V
Load Reg Load Regulation VOUT /T RR VNO VDET VDET(ERR) VRESET Temperature Coefficient Ripple Rejection Output Noise Voltage Low Voltage Detector Threshold Voltage Detector Threshold Tolerance Saturation Voltage
CONTROL TERMINAL SPECIFICATIONS ICONT VCONT(ON) VCONT(OFF) TR Control Terminal Current Control Voltage (ON) Control Voltage (OFF) Output Rise Time (OFF to ON) VCONT = 5 V VCONT = 16 V Output ON Output OFF IOUT = 30 mA, CL = 0.1 F, CN = 0.1 F 2.4 50 25 45 100 150 0.6 A A V V s
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TK119xx
TK11930 ELECTRICAL CHARACTERISTICS
Test conditions: VIN = 4.0 V, CL = 10 F, CN = 0.01 F, TA = 25 C, unless otherwise specified. SYMBOL IQ IGND ISTBY VOUT VDROP IOUT Line Reg PARAMETER Quiescent Current Ground Current Standby Current Output Voltage Dropout Voltage Output Current Line Regulation VIN = 4.0 to 13.0 V IOUT = 1 to 80 mA 5 20 0.2 f = 400 Hz, CL = 10 F 10 Hz f 100 kHz, CL = 10 F, CN = 0.01 F 68 50 VOUT x 0.95 -4 IFLAG = 100 A VDET 0.2 +4 0.4 TEST CONDITIONS IOUT = 0 mA VIN = 2.0 V, IOUT = 0 mA IOUT = 60 mA Output OFF IOUT = 1 mA, TA = 25 C IOUT = 1 mA, -30 TA 80 C IOUT = 30 mA 2.92 2.88 MIN TYP 140 380 2.5 95 3.0 3.0 160 MAX 300 900 10 160 3.08 3.12 350 100 50 100 UNITS A A mA A V V mV mA mV mV mV/ C dB Vrms V % V
Load Reg Load Regulation VOUT /T RR VNO VDET VDET(ERR) VRESET Temperature Coefficient Ripple Rejection Output Noise Voltage Low Voltage Detector Threshold Voltage Detector Threshold Tolerance Saturation Voltage
CONTROL TERMINAL SPECIFICATIONS ICONT VCONT(ON) VCONT(OFF) TR Control Terminal Current Control Voltage (ON) Control Voltage (OFF) Output Rise Time (OFF to ON) VCONT = 5 V VCONT = 16 V Output ON Output OFF IOUT = 30 mA, CL = 0.1 F, CN = 0.1 F 2.4 50 25 45 100 150 0.6 A A V V s
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TK119xx
TK11932 ELECTRICAL CHARACTERISTICS
Test conditions: VIN = 4.25 V, CL = 10 F, CN = 0.01 F, TA = 25 C, unless otherwise specified. SYMBOL IQ IGND ISTBY VOUT VDROP IOUT Line Reg PARAMETER Quiescent Current Ground Current Standby Current Output Voltage Dropout Voltage Output Current Line Regulation VIN = 4.25 to 13.25 V IOUT = 1 to 80 mA 5 20 0.2 f = 400 Hz, CL = 10 F 10 Hz f 100 kHz, CL = 10 F, CN= 0.01 F 68 50 VOUT x 0.95 -4 IFLAG = 100 A VDET 0.2 +4 0.4 TEST CONDITIONS IOUT = 0 mA VIN = 2.25 V, IOUT = 0 mA IOUT = 60 mA Output OFF IOUT = 1 mA, TA = 25 C IOUT = 1 mA, -30 TA 80 C IOUT = 30 mA 3.17 3.13 MIN TYP 140 380 2.5 95 3.25 3.25 16 0 MAX 300 900 10 160 3.33 3.37 350 100 50 100 UNITS A A mA A V V mV mA mV mV mV/ C dB Vrms V % V
Load Reg Load Regulation VOUT /T RR VNO VDET VDET(ERR) VRESET Temperature Coefficient Ripple Rejection Output Noise Voltage Low Voltage Detector Threshold Voltage Detector Threshold Tolerance Saturation Voltage
CONTROL TERMINAL SPECIFICATIONS ICONT VCONT(ON) VCONT(OFF) TR Control Terminal Current Control Voltage (ON) Control Voltage (OFF) Output Rise Time (OFF to ON) VCONT = 5 V VCONT = 16 V Output ON Output OFF IOUT = 30 mA, CL = 0.1 F, CN = 0.1 F 2.4 50 25 45 100 150 0.6 A A V V s
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TK119xx
TK11935 ELECTRICAL CHARACTERISTICS
Test conditions: VIN = 4.5 V, CL = 10 F, CN = 0.01 F, TA = 25 C, unless otherwise specified. SYMBOL IQ IGND ISTBY VOUT VDROP IOUT Line Reg PARAMETER Quiescent Current Ground Current Standby Current Output Voltage Dropout Voltage Output Current Line Regulation VIN = 4.5 to 13.5 V IOUT = 1 to 80 mA 5 20 0.2 f = 400 Hz, CL = 10 F 10 Hz f 100 kHz, CL = 10 F, CN = 0.01 F 68 50 VOUT x 0.95 -4 IFLAG = 100 A VDET 0.2 +4 0.4 TEST CONDITIONS IOUT = 0 mA VIN = 2.5 V, IOUT = 0 mA IOUT = 60 mA Output OFF IOUT = 1 mA, TA = 25 C IOUT = 1 mA, -30 TA 80 C IOUT = 30 mA 3.41 3.37 MIN TYP 14 0 380 2.5 95 3.50 3.50 160 MAX 300 900 10 160 3.59 3.63 350 100 50 100 UNITS A A mA A V V mV mA mV mV mV/ C dB Vrms V % V
Load Reg Load Regulation VOUT /T RR VNO VDET VDET(ERR) VRESET Temperature Coefficient Ripple Rejection Output Noise Voltage Low Voltage Detector Threshold Voltage Detector Threshold Tolerance Saturation Voltage
CONTROL TERMINAL SPECIFICATIONS ICONT VCONT(ON) VCONT(OFF) TR Control Terminal Current Control Voltage (ON) Control Voltage (OFF) Output Rise Time (OFF to ON) VCONT = 5 V VCONT = 16 V Output ON Output OFF IOUT = 30 mA, CL = 0.1 F, CN = 0.1 F 2.4 50 25 45 100 150 0.6 A A V V s
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TK119xx
TK11940 ELECTRICAL CHARACTERISTICS
Test conditions: VIN = 5.0 V, CL = 10 F, CN = 0.01 F, TA = 25 C, unless otherwise specified. SYMBOL IQ IGND ISTBY VOUT VDROP IOUT Line Reg PARAMETER Quiescent Current Ground Current Standby Current Output Voltage Dropout Voltage Output Current Line Regulation VIN = 5.0 to 14.0 V IOUT = 1 to 80 mA 5 20 0.2 f = 400 Hz, CL = 10 F 10 Hz f 100 kHz, CL = 10 F, CN = 0.01 F 68 50 VOUT x 0.95 -4 IFLAG = 100 A VDET 0.2 +4 0.4 TEST CONDITIONS IOUT = 0 mA VIN = 3.0 V, IOUT = 0 mA IOUT = 60 mA Output OFF IOUT = 1 mA, TA = 25 C IOUT = 1 mA, -30 TA 80 C IOUT = 30 mA 3.90 3.86 MIN TYP 140 380 2.5 95 4.00 4.00 160 MAX 300 900 10 160 4.10 4.14 350 100 50 100 UNITS A A mA A V V mV mA mV mV mV/ C dB Vrms V % V
Load Reg Load Regulation VOUT /T RR VNO VDET VDET(ERR) VRESET Temperature Coefficient Ripple Rejection Output Noise Voltage Low Voltage Detector Threshold Voltage Detector Threshold Tolerance Saturation Voltage
CONTROL TERMINAL SPECIFICATIONS ICONT VCONT(ON) VCONT(OFF) TR Control Terminal Current Control Voltage (ON) Control Voltage (OFF) Output Rise Time (OFF to ON) VCONT = 5 V VCONT = 16 V Output ON Output OFF IOUT = 30 mA, CL = 0.1 F, CN = 0.1 F 2.4 50 25 45 100 150 0.6 A A V V s
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TK119xx
TK11948 ELECTRICAL CHARACTERISTICS
Test conditions: VIN = 5.8 V, CL = 10 F, CN = 0.01 F, TA = 25 C, unless otherwise specified. SYMBOL IQ IGND ISTBY VOUT VDROP IOUT Line Reg PARAMETER Quiescent Current Ground Current Standby Current Output Voltage Dropout Voltage Output Current Line Regulation VIN = 5.8 to 14.8 V IOUT = 1 to 80 mA 5 20 0.2 f = 400 Hz, CL = 10 F 10 Hz f 100 kHz, CL = 10 F, CN = 0.01 F 68 50 VOUT x 0.95 -4 IFLAG = 100 A VDET 0.2 +4 0.4 TEST CONDITIONS IOUT = 0 mA VIN = 3.8 V, IOUT = 0 mA IOUT = 60 mA Output OFF IOUT = 1 mA, TA = 25 C IOUT = 1 mA, -30 TA 80 C IOUT = 30 mA 4.68 4.63 MIN TYP 140 380 2.5 95 4.80 4.80 160 MAX 300 900 10 160 4.92 4.97 350 100 50 100 UNITS A A mA A V V mV mA mV mV mV/ C dB Vrms V % V
Load Reg Load Regulation VOUT /T RR VNO VDET VDET(ERR) VRESET Temperature Coefficient Ripple Rejection Output Noise Voltage Low Voltage Detector Threshold Voltage Detector Threshold Tolerance Saturation Voltage
CONTROL TERMINAL SPECIFICATIONS ICONT VCONT(ON) VCONT(OFF) TR Control Terminal Current Control Voltage (ON) Control Voltage (OFF) Output Rise Time (OFF to ON) VCONT = 5 V VCONT = 16 V Output ON Output OFF IOUT = 30 mA, CL = 0.1 F, CN = 0.1 F 2.4 50 25 45 100 150 0.6 A A V V s
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TK119xx
TK11950 ELECTRICAL CHARACTERISTICS
Test conditions: VIN = 6.0 V, CL = 10 F, CN = 0.01 F, TA = 25 C, unless otherwise specified. SYMBOL IQ IGND ISTBY VOUT VDROP IOUT Line Reg PARAMETER Quiescent Current Ground Current Standby Current Output Voltage Dropout Voltage Output Current Line Regulation VIN = 6.0 to 15.0 V IOUT = 1 to 80 mA 5 20 0.2 f = 400 Hz, CL = 10 F 10 Hz f 100 kHz, CL = 10 F, CN = 0.01 F 68 50 VOUT x 0.95 -4 IFLAG = 100 A VDET 0.2 +4 0.4 TEST CONDITIONS IOUT = 0 mA VIN = 4.0 V, IOUT = 0 mA IOUT = 60 mA Output OFF IOUT = 1 mA, TA = 25 C IOUT = 1 mA, -30 TA 80 C IOUT = 30 mA 4.875 4.825 MIN TYP 140 380 2.5 95 5.000 5.000 160 MAX 300 900 10 160 5.125 5.175 350 100 50 100 UNITS A A mA A V V mV mA mV mV mV/ C dB Vrms V % V
Load Reg Load Regulation VOUT /T RR VNO VDET VDET(ERR) VRESET Temperature Coefficient Ripple Rejection Output Noise Voltage Low Voltage Detector Threshold Voltage Detector Threshold Tolerance Saturation Voltage
CONTROL TERMINAL SPECIFICATIONS ICONT VCONT(ON) VCONT(OFF) TR Control Terminal Current Control Voltage (ON) Control Voltage (OFF) Output Rise Time (OFF to ON) VCONT = 5 V VCONT = 16 V Output ON Output OFF IOUT = 30 mA, CL = 0.1 F, CN = 0.1 F 2.4 50 25 45 100 150 0.6 A A V V s
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TK119xx
TEST CIRCUIT
VOUT VIN + + 1 F VOUT + CL 10 F
IOUT
NOISE BYPASS CONT ICONT CN 0.01 F
RESET OUTPUT
220 k + VCONT +
TIMING DIAGRAM PRINCIPLE OF OPERATION
OUTPUT VOLTAGE 5 V
GLITCH
RESET OUTPUT NOT VALID NOT VALID
~5 V
GLITCH
~5 V
INPUT VOLTAGE t
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TK119xx
TYPICAL PERFORMANCE CHARACTERISTICS
TA = 25 C, unless otherwise specified.
DROPOUT VOLTAGE VS. OUTPUT CURRENT 500 400 VDROP (mV)
IGND (mA)
GROUND CURRENT VS. OUTPUT CURRENT 10
INPUT CURRENT AND CONTROL CURRENT VS. CONTROL VOLTAGE 200 100
IIN
ICONT (A) IIN (A)
300 200 100
5
100
SHUTDOWN POINT
50
ICONT 0 50 IOUT (mA) OUTPUT VOLTAGE VS. OUTPUT CURRENT
-50
0 0 50 IOUT (mA) SATURATION VOLTAGE VS. RESET OUTPUT CURRENT 250 200 VIN = 1 V
VSAT (mV)
100
0 0
0 0 2.5 VCONT (V)
NOISE LEVEL VS. FREQUENCY (TK11950)
100
5.0
3V 5V
5 4 3 2 1 0 NOISE (dB) VOUT (V)
IOUT = 25 mA CL = 0.1 F CN = 0.1 F -100
150 100 50 0 0
2V 6V
CL = 3.3 F CN = 0.1 F
0.5 IFLAG (mA)
1.0
0
100 IOUT (mA)
200
0
500 k f (Hz)
1M
LINE VOLTAGE STEP RESPONSE 7V
LOAD CURRENT STEP RESPONSE
VCONT
TURN-ON TIME VS. OUTPUT CAPACITOR 2.4 V IOUT = 30 mA 1 F 0V CL = .1 F 10 F
VOUT
VIN
VOUT (100 mV / DIV)
VOUT (20 mV / DIV)
IOUT
6V
0 mA
VOUT
VOUT
VOUT (1 V / DIV)
50 mA
15 F 4.7 F
TIME (50 s/DIV)
TIME (50 s/DIV)
TIME (50 s/DIV)
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TK119xx
TYPICAL PERFORMANCE CHARACTERISTICS (CONT.)
TA = 25 C, unless otherwise specified.
RIPPLE REJECTION VS. FREQUENCY 0
NOISE VS. BYPASS CAPACITOR VALUE 300 200
NOISE (Vrms)
RR (dB)
150 100 50 0 1 pF
CL = 0.1 F -50
VIN
VOUT 119xx + SW CN 0.01 F CL 10 F 0.1 F
CL = 10 F
RIPPLE REJECTION CIRCUIT
10 pF 100 pF1000 pF 0.01 F0.1 F CN GROUND CURRENT (ON MODE) VS. TEMPERATURE
-100 100
1k f (Hz)
10 k
100 k
STANDBY CURRENT (OFF MODE) VS. TEMPERATURE 100 50 40
ICONT (A)
CONTROL CURRENT VS. TEMPERATURE
10
ISTBY (A)
IGND (mA)
30 20 10
VCONT = 5 V
5
IOUT = 60 mA IOUT = 30 mA
50
VCONT = 2.5 V
0 -50
0 TA (C)
50
100
0 -50
0 TA (C)
50
100
0 -50
0 TA (C)
50
100
CONTROL VOLTAGE (OFF POINT) VS. TEMPERATURE 2.0 4.85
VOLTAGE DETECTOR VS. TEMPERATURE 500 400 300 200 100
DROPOUT VOLTAGE VS. TEMPERATURE
VDROP (mV)
VCONT (V)
VDET (V)
IOUT = 60 mA
1.0
4.75
IOUT = 30 mA
0 -50
0 TA (C)
50
100
4.65 -50
0 TA (C)
50
100
0 -50
0 TA (C)
50
100
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TK119xx
TYPICAL PERFORMANCE CHARACTERISTICS (CONT.)
TA = 25 C, unless otherwise specified.
OUTPUT VOLTAGE VS. INPUT VOLTAGE 2.35 2.45 2.25 VOUT (V)
VDET (V) VOUT (V)
TK11922
OUTPUT VOLTAGE VS. OUTPUT CURRENT LOW VOLTAGE DETECTOR VS. INPUT VOLTAGE 5.0
2.15 2.05 1.95
2.25
VOUT 2.5
2.05 1.85 0 50 IOUT (mA)
QUIESCENT CURRENT VS. INPUT VOLTAGE 500 2.75
0 0 10 VIN (V)
OUTPUT VOLTAGE VS. INPUT VOLTAGE 2.25
100
20
0
2.5 VIN (V)
OUTPUT VOLTAGE VS. AMBIENT TEMPERATURE
5.0
VOUT (V)
IOUT = 0 mA 2.25
250
VOUT (V)
IQ (mA)
2.20
30 mA 60 mA 0 0 10 VIN (V) 20 1.75 1.75 2.25 VIN (V) 3.75 2.15 -50 0 TA (C) LOW VOLTAGE DETECTOR VS. INPUT VOLTAGE 5.0 2.75 50 100
TK11927
OUTPUT VOLTAGE VS. OUTPUT CURRENT 2.85 2.95 OUTPUT VOLTAGE VS. INPUT VOLTAGE
VOUT (V)
VDET (V)
VOUT (V)
2.65 2.55 2.45
VOUT 2.5
2.75
2.55 0 50 IOUT (mA) 100 2.35 0 10 VIN (V) 20 0 0 2.5 VIN (V) 5.0
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VOUT (V)
VOUT (V)
TK119xx
TYPICAL PERFORMANCE CHARACTERISTICS (CONT.)
TA = 25 C, unless otherwise specified.
OUTPUT VOLTAGE VS. INPUT VOLTAGE 3.25 2.80
TK11927 (CONT.)
QUIESCENT CURRENT VS. INPUT VOLTAGE 500 OUTPUT VOLTAGE VS. AMBIENT TEMPERATURE
VOUT (V)
IOUT = 0 mA 2.75
250
VOUT (V)
IQ (mA)
2.75
30 mA 60 mA 0 0 10 VIN (V) 20 2.25 2.25 2.75 VIN (V) OUTPUT VOLTAGE VS. INPUT VOLTAGE 3.35 3.45 3.25
5.0
3.25
2.70 -50
0 TA (C)
50
100
TK11930
OUTPUT VOLTAGE VS. OUTPUT CURRENT
LOW VOLTAGE DETECTOR VS. INPUT VOLTAGE
VOUT (V)
VOUT (V)
VDET (V)
3.15 3.05 2.95
3.25
2.5
3.05 2.85 0 50 IOUT (mA) 100 0 10 VIN (V) 20
0 0 2.5 VIN (V) 5.0
QUIESCENT CURRENT VS. INPUT VOLTAGE 500 3.75
OUTPUT VOLTAGE VS. INPUT VOLTAGE 3.30
OUTPUT VOLTAGE VS. AMBIENT TEMPERATURE
VOUT (V)
IOUT = 0 mA 3.25
250
VOUT (V)
IQ (mA)
3.25
30 mA 60 mA 0 0 10 VIN (V) 20 2.75 2.75 3.25 VIN (V) 3 .75 3.20 -50 0 TA (C) 50 100
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January 1999 TOKO, Inc.
VOUT (V)
VOUT
TK119xx
TYPICAL PERFORMANCE CHARACTERISTICS (CONT.)
TA = 25 C, unless otherwise specified.
OUTPUT VOLTAGE VS. INPUT VOLTAGE 3.35 3.45 3.25
VOUT (V)
VOUT (V)
TK11932
OUTPUT VOLTAGE VS. OUTPUT CURRENT LOW VOLTAGE DETECTOR VS. INPUT VOLTAGE 5.0
VDET (V)
3.15 3.05 2.95
3.25
2.5
3.05 0 50 IOUT (mA) 100 2.85 0 10 VIN (V)
OUTPUT VOLTAGE VS. INPUT VOLTAGE 3.75 3.30
0 20 0 2.5 VIN (V)
OUTPUT VOLTAGE VS. AMBIENT TEMPERATURE
5.0
QUIESCENT CURRENT VS. INPUT VOLTAGE 500
VOUT (V)
IOUT = 0 mA 3.25
250
VOUT (V)
IQ (mA)
3.25
30 mA 60 mA
0 0 10 VIN (V) 20
2.75 2.75
3.25 VIN (V) OUTPUT VOLTAGE VS. INPUT VOLTAGE
3 .75
3.20 -50
0 TA (C)
50
100
TK11935
OUTPUT VOLTAGE VS. OUTPUT CURRENT 3.6 3.7 3.5 VOUT 5.0 LOW VOLTAGE DETECTOR VS. INPUT VOLTAGE
VOUT (V)
VDET (V)
VOUT (V)
3.4 3.3 3.2
3.5
2.5
3.3 0 50 IOUT (mA) 100 3.1 0 0 10 VIN (V) 20 0 2.5 VIN (V) 5.0
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VOUT (V)
VOUT (V)
VOUT
TK119xx
TYPICAL PERFORMANCE CHARACTERISTICS (CONT.)
TA = 25 C, unless otherwise specified.
OUTPUT VOLTAGE VS. INPUT VOLTAGE 4.0 3.55
TK11935 (CONT.)
QUIESCENT CURRENT VS. INPUT VOLTAGE 500 OUTPUT VOLTAGE VS. AMBIENT TEMPERATURE
VOUT (V)
IOUT = 0 mA 3.5
250
VOUT (V)
IQ (mA)
3.50
30 mA 60 mA 0 0 10 VIN (V) 20 3.0 3.0 3.5 VIN (V) OUTPUT VOLTAGE VS. INPUT VOLTAGE 4.1 4.2 4.0
VOUT (V)
4.0
3.45 -50
0 TA (C)
50
100
TK11940
OUTPUT VOLTAGE VS. OUTPUT CURRENT LOW VOLTAGE DETECTOR VS. INPUT VOLTAGE 5.0 VOUT
VOUT (V)
VDET (V)
3.9 3.8 3.7
4.0
2.5
3.8 0 50 IOUT (mA)
QUIESCENT CURRENT VS. INPUT VOLTAGE 500 4.5
100
3.6 0
0 10 VIN (V)
OUTPUT VOLTAGE VS. INPUT VOLTAGE 4.05
20
0
2.5 VIN (V)
OUTPUT VOLTAGE VS. AMBIENT TEMPERATURE
5.0
VOUT (V)
IOUT = 0 mA 4.0
250
VOUT (V)
IQ (mA)
4.00
30 mA 60 mA 0 0 10 VIN (V) 20 3.5 3.5 4.0 VIN (V) 4.5 3.95 -50 0 TA (C) 50 100
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VOUT (V)
TK119xx
TYPICAL PERFORMANCE CHARACTERISTICS (CONT.)
TA = 25 C, unless otherwise specified.
OUTPUT VOLTAGE VS. INPUT VOLTAGE 4.9 5.0 4.8
VDET (V) VOUT (V)
TK11948
OUTPUT VOLTAGE VS. OUTPUT CURRENT LOW VOLTAGE DETECTOR VS. INPUT VOLTAGE 5.0
VOUT (V)
4.7 4.6 4.5
4.8
2.5
VOUT
4.6 0 50 IOUT (mA) QUIESCENT CURRENT VS. INPUT VOLTAGE 500
5.3
100
4.4 0
0 10 VIN (V)
OUTPUT VOLTAGE VS. INPUT VOLTAGE 4.85
20
0
2.5 VIN (V)
5.0
OUTPUT VOLTAGE VS. AMBIENT TEMPERATURE
VOUT (V)
IOUT = 0 mA 4.8
250
VOUT (V)
IQ (mA)
4.80
30 mA 60 mA
0 0 10 VIN (V) 20
4.3 4.3
4.8 VIN (V)
5.3
4.75 -50
0 TA (C)
50
100
TK11950
OUTPUT VOLTAGE VS. OUTPUT CURRENT 5.1 5.2 5.0 5.0 OUTPUT VOLTAGE VS. INPUT VOLTAGE LOW VOLTAGE DETECTOR VS. INPUT VOLTAGE
VOUT (V)
VOUT (V)
VDET (V)
4.9 4.8 4.7
5.0
2.5
VOUT
4.8 0 50 IOUT (mA) 100 4.6 0 0 10 VIN (V) 20 0 2.5 VIN (V) 5.0
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VOUT (V)
VOUT (V)
TK119xx
TYPICAL PERFORMANCE CHARACTERISTICS (CONT.)
TA = 25 C, unless otherwise specified. TK11950 (CONT.)
QUIESCENT CURRENT VS. INPUT VOLTAGE 500 5.5 OUTPUT VOLTAGE VS. INPUT VOLTAGE 5.05 OUTPUT VOLTAGE VS. AMBIENT TEMPERATURE
VOUT (V)
IOUT = 0 mA 5.0
250
VOUT (V)
IQ (mA)
5.00
30 mA 60 mA 0 0 10 VIN (V) 20 4.5 4.5 5.0 VIN (V) 5.5 4.95 -50 0 TA (C) 50 100
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January 1999 TOKO, Inc.
TK119xx
DEFINITION AND EXPLANATION OF TECHNICAL TERMS
QUIESCENT CURRENT (IQ) The quiescent current is the current which flows through the ground terminal under no load conditions (IOUT = 0 mA). GROUND CURRENT (IGND) Ground current is the current which flows through the ground pin(s). It is defined as IIN - IOUT, excluding control current. LINE REGULATION (LINE REG) Line regulation is the relationship between change in output voltage due to a change in input voltage. LOAD REGULATION (LOAD REG) Load regulation is the relationship between change in output voltage due to a change in load current. DROPOUT VOLTAGE (VDROP) This is a measure of how well the regulator performs as the input voltage decreases. The smaller the number, the further the input voltage can decrease before regulation problems occur. Nominal output voltage is first measured when VIN = VOUT(TYP) + 1 at a chosen load current. When the output voltage has dropped 100 mV from the nominal, VIN - VOUT is the dropout voltage. This voltage is affected by load current and junction temperature. OUTPUT NOISE VOLTAGE Tj = 0jA x PD + TA This is the effective AC voltage that occurs on the output voltage under the condition where the input noise is low and with a given load, filter capacitor, and frequency range. THERMAL PROTECTION This is an internal feature which turns the regulator off when the junction temperature rises above 150 C. After the regulator turns off, the temperature drops and the regulator output turns back on. Under certain conditions, the output waveform may appear to be an oscillation as the output turns off and on and back again in succession. For Toko ICs, the internal limit for junction temperature is 150 C. If the ambient temperature (TA) is 25 C, then: 150 C = 0jA x PD + 25 C 0jA = 125 C/ PD PD is the value when the thermal sensor is activated. A simple way to determine PD is to calculate VIN x IIN when the output side is shorted. Input current gradually falls as temperature rises. You should use the value when thermal equilibrium is reached. PACKAGE POWER DISSIPATION (PD) This is the power dissipation level at which the thermal sensor is activated. The IC contains an internal thermal sensor which monitors the junction temperature. When the junction temperature exceeds the monitor threshold of 150 C, the IC is shut down. The junction temperature rises as the difference between the input power (VIN x IIN) and the output power (VOUT x IOUT) increases. The rate of temperature rise is greatly affected by the mounting pad configuration on the PCB, the board material, and the ambient temperature. When the IC mounting has good thermal conductivity, the junction temperature will be low even if the power dissipation is great. When mounted on the recommended mounting pad, the power dissipation of the SOT-23L is increased to 400 mW. For operation at ambient temperatures over 25 C, the power dissipation of the SOT-23L device should be derated at 3.2 mW/C. To determine the power dissipation for shutdown when mounted, attach the device on the actual PCB and deliberately increase the output current (or raise the input voltage) until the thermal protection circuit is activated. Calculate the power dissipation of the device by subtracting the output power from the input power. These measurements should allow for the ambient temperature of the PCB. The value obtained from PD /(150 C - TA) is the derating factor. The PCB mounting pad should provide maximum thermal conductivity in order to maintain low device temperatures. As a general rule, the lower the temperature, the better the reliability of the device. The thermal resistance when mounted is expressed as follows:
January 1999 TOKO, Inc.
Page 19
TK119xx
DEFINITION AND EXPLANATION OF TECHNICAL TERMS (CONT.)
The range of usable currents can also be found from the graph below.
(mW) PD 3
DPD
6 4 5
25
50
75 TA (C)
150
Procedure: 1) 2) 3) 4) Find PD PD1 is taken to be PD x (~ 0.8 - 0.9) Plot PD1 against 25 C Connect PD1 to the point corresponding to the 150 C with a straight line. 5) In design, take a vertical line from the maximum operating temperature (e.g., 75 C) to the derating curve. 6) Read off the value of PD against the point at which the vertical line intersects the derating curve. This is taken as the maximum power dissipation, DPD. The maximum operating current is: IOUT = (DPD / (VIN(MAX) - VOUT)
500 400
PD (mW)
MOUNTED
300 200 100 0 0 50 TA (C)
FREE AIR
100
150
SOT-23L POWER DISSIPATION Page 20 January 1999 TOKO, Inc.
TK119xx
APPLICATION INFORMATION
INPUT/OUTPUT DECOUPLING CONSIDERATIONS CAPACITOR
VIN GND VOUT
Voltage regulators require input and output decoupling capacitors. The required values of these capacitors vary with application. Capacitors made by different manufacturers can have different characteristics, particularly with regard to high frequencies and Equivalent Series Resistance (ESR) over temperature. The type of capacitor is also important. For example, a 4.7 F aluminum electrolytic may be required for a certain application. If a tantalum capacitor is used, a lower value of 2.2 F would be adequate. It is important to consider the temperature characteristics of the decoupling capacitors. While Toko regulators are designed to operate as low as -30 C, many capacitors will not operate properly at this temperature. The capacitance of aluminum electrolytic capacitors may decrease to 0 at low temperatures. This may cause oscillation on the output of the regulator since some capacitance is required to guarantee stability. Thus, it is important to consider the characteristics of the capacitor over temperature when selecting decoupling capacitors. The ESR is another important parameter. The ESR will increase with temperature but low ESR capacitors are often larger and more costly. In general, tantalum capacitors offer lower ESR than aluminum electrolytic, but new low ESR aluminum electrolytic capacitors are now available from several manufacturers. Usually a bench test is sufficient to determine the minimum capacitance required for a particular application. After taking thermal characteristics and tolerance into account, the minimum capacitance value should be approximately two times the value. The recommended minimum capacitance for the TK119xx is 2.2 F for a tantalum capacitor or 3.3 F for an aluminum electrolytic. Please note that linear regulators with a low dropout voltage have high internal loop gains which require care in guarding against oscillation caused by insufficient decoupling capacitance. The use of high quality decoupling capacitors suited for your application will guarantee proper operation of the circuit. BOARD LAYOUT Copper pattern should be as large as possible. Power dissipation is 400 mW for the SOT-23L package. A low ESR capacitor is recommended. For low temperature operation, select a capacitor with a low ESR at the lowest operating temperature to prevent oscillation, degradation of ripple rejection and increase in noise. The minimum recommended capacitance is 2.2 F. January 1999 TOKO, Inc.
+
+
GND
RESET
CONTROL
SOT-23L BOARD LAYOUT
NOISE BYPASS CAPACITOR SECTION The noise bypass capacitor (CN) should be connected as close as possible to pin 1 and ground. The recommended value for CN is 0.01 F. The noise bypass terminal has a high impedance and care should be taken if the noise bypass capacitor is not used. This terminal is susceptible to external noise, and oscillation can occur when CN is not used and the solder pad for this pin is too large. RESET OUTPUT CONSIDERATIONS It is important to note the accuracy of the regulator and voltage detector functions when they are combined within one IC. The figure below illustrates the voltage regulator and voltage detector implemented with individual reference voltages.
VMAX
VMIN RMAX
RMIN
NON-TOKO APPROACH
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TK119xx
APPLICATION INFORMATION (CONT.)
Note: VMIN - RMAX 0 is possible, meaning the two ranges may overlap. The figure below illustrates the TK119xx. The TK119xx utilizes the same reference voltage for both the voltage regulator and the voltage detector functions. As a result, the detector voltage is always constant (VOUT x 0.95 %) from the output voltage. With this approach, the two ranges do not overlap.
VMAX
HANDLING MOLDED RESIN PACKAGES All plastic molded packages absorb some moisture from the air. If moisture absorption occurs prior to soldering the device into the printed circuit board, increased separation of the lead from the plastic molding may occur, degrading the moisture barrier characteristics of the device. This property of plastic molding compounds should not be overlooked, particularly in the case of very small packages, where the plastic is very thin. In order to preserve the original moisture barrier properties of the package, devices are stored and shipped in moisture proof bags filled with dry air. The bags should not be opened or damaged prior to the actual use of the devices. If this is unavoidable, the devices should be stored in a low relative humidity environment (40 to 65%) or in an enclosed environment with desiccant.
VMIN RMAX
RMIN
TOKO APPROACH
TYPICAL APPLICATIONS
CONTROL FUNCTION UTILIZED CONTROL FUNCTION NOT UTILIZED
VIN + 1 F + 4.7 F
VOUT
VIN + 1 F + 4.7 F
VOUT
RRESET
RRESET
LOW = ON RESET OUTPUT
RESET OUTPUT
CMOS OR TTL GATE
CN 0.01 F
CN 0.01 F
LOW VOLTAGE SHUTDOWN
VIN
VOUT + 1 F + 4.7 F
Note: Parallel connection of control pins is allowed if all devices use identical input voltages. 39 K RRESET 220 K Choose for correct High Logic level.
CN 0.01 F
RESET SW
Page 22
January 1999 TOKO, Inc.
TK119xx
PACKAGE OUTLINE
Marking Information
Marking G22 G27 G30 G3 G35 G40 G4 G5
SOT-23L (SOT-23L-6)
0.4 6 5 4
+0.15 - 0.05
0.1
M
0.6
1.0
Marking
TK11922 TK11927 TK11930 TK11932 TK11935 TK11940 TK11948 TK11950
e1 3.0
Product Code
Voltage Code
1 e
2 e 0.95
3 0.32 5 PL 0.95
+0.15 - 0.05
0.1
M
e 0.95
e 0.95
Recommended Mount Pad
3.5
+0.3 - 0.1
(3.4)
2.2 0.3 1.4 max
0 - 0.1
+0.15 - 0.05
15 max 0.4
+ 0.3
1.2
0.15
Dimensions are shown in millimeters Tolerance: x.x = 0.2 mm (unless otherwise specified)
3.3
Toko America, Inc. Headquarters 1250 Feehanville Drive, Mount Prospect, Illinois 60056 Tel: (847) 297-0070 Fax: (847) 699-7864
TOKO AMERICA REGIONAL OFFICES
Midwest Regional Office Toko America, Inc. 1250 Feehanville Drive Mount Prospect, IL 60056 Tel: (847) 297-0070 Fax: (847) 699-7864 Western Regional Office Toko America, Inc. 2480 North First Street , Suite 260 San Jose, CA 95131 Tel: (408) 432-8281 Fax: (408) 943-9790 Eastern Regional Office Toko America, Inc. 107 Mill Plain Road Danbury, CT 06811 Tel: (203) 748-6871 Fax: (203) 797-1223 Semiconductor Technical Support Toko Design Center 4755 Forge Road Colorado Springs, CO 80907 Tel: (719) 528-2200 Fax: (719) 528-2375
Visit our Internet site at http://www.tokoam.com
The information furnished by TOKO, Inc. is believed to be accurate and reliable. However, TOKO reserves the right to make changes or improvements in the design, specification or manufacture of its products without further notice. TOKO does not assume any liability arising from the application or use of any product or circuit described herein, nor for any infringements of patents or other rights of third parties which may result from the use of its products. No license is granted by implication or otherwise under any patent or patent rights of TOKO, Inc.
January 1999 TOKO, Inc.
(c) 1999 Toko, Inc. All Rights Reserved IC-119-TK119xx 0798O0.0K
Page 23
Printed in the USA

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