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UNISONIC TECHNOLOGIES CO., LTD P1696
150KHZ, 2A PWM STEP-DOWN DC/DC CONVERTER
DESCRIPTION
The UTC P1696 series is a step-down switching regulator able to provide 2A output current. The available output voltages are 2.5V 3.3V, 5V, 12V, and an adjustable output version.
LINEAR INTEGRATED CIRCUIT
SOP-8
FEATURES
*Output load current: 2A *Adjustable version output voltage range, 1.23V ~ 27.5V4% *Operating voltage can be up to 30V (VIN->30V) *Low power standby mode *High efficiency *Internal current and thermal limit
*Pb-free plating product number:P1696L
ORDERING INFORMATION
Order Number Normal Lead Free Plating P1696-XX-S08-R P1696L-xx-S08-R P1696-xx-S08-T P1696L-xx-S08-T Package SOP-8 SOP-8 Packing Tape Reel Tube
P1696L-xx-S08-R (1)Packing Type (2)Package Type (3)Output Voltage Code (4)Lead Plating
(1) R: Tape Reel, T: Tube (2) S08: SOP-8 (3) xx: 2 5 :2 . 5 V, 3 3 : 3 .3 V ,5 0 : 5 . 0 V, 1 2 :1 2 V ,AD :AD J (4) L: Lead Free Plating, Blank: Pb/Sn
PIN DESCRIPTION
PIN NO. 1 2 3 4 5,6,7,8 PIN NAME VIN Output FB (Feedback) SD (Shutdown) GND DESCRIPTION Operating voltage input Switching output Output voltage feedback control ON/OFF shutdown Circuit Ground
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BLOCK DIAGRAM
ON / OFF
LINEAR INTEGRATED CIRCUIT
VIN
Current Source bias
1.235V Reference
2.5V Regulator
Start up
+ Comp Comp +
FB
+ Amp -
Frequency Compensation
Comp +
Pre-driver
2A Switch Output
150kHz OSC.
Thermal Shutdown
Gnd
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ABSOLUTE MAXIMUM RATINGS
LINEAR INTEGRATED CIRCUIT
PARAMETER SYMBOL RATINGS UNIT Maximum Supply Voltage VCC 40 V Operating Voltage VOPR 3.8 ~ 30 V ON/OFF Pin Input Voltage VON/OFF -0.3 ~ +25 V Feedback Pin Voltage VFB -0.3 ~ +25 V Output Voltage to Ground (Steady State) VOUT -1 V Power Dissipation PD Internally limited mW Junction Temperature TJ +150 Operating Temperature TOPR -40 ~ +125 Storage Temperature TSTG -40 ~ +150 Note: Absolute maximum ratings are those values beyond which the device could be permanently damaged. Absolute maximum ratings are stress ratings only and functional device operation is not implied.
ELECTRICAL CHARACTERISTICS
(TJ=25 , VIN=12V for the 2.5V 3.3V, 5V, and Adjustable version and VIN=24V for the 12V version, ILOAD=500mA.) PARAMETER SYMBOL TEST CONDITIONS MIN TYP MAX UNIT 2.5V 3.8V VIN 30V, 0.2A ILOAD 2A V 2.4 2.5 2.6 3.3V 4.75V VIN 30V, 0.2A ILOAD 2A 3.168 3.3 3.432 V Output Voltage VOUT 5.0V 7V VIN 30V, 0.2A ILOAD 2A 4.8 5.0 5.2 V 12V 15V VIN 30V, 0.2A ILOAD 2A 11.52 12.0 12.48 V 2.5V VIN=12V, ILOAD=2A % 73 3.3V VIN=12V, ILOAD=2A 75 % Efficiency 5.0V VIN=12V, ILOAD=2A 80 % 12V 80 % VIN=25V, ILOAD=2A UTC P1696-ADJ 4.5V VIN 30V, 0.2A ILOAD 2A 1.19 1.230 1.267 V Feedback Voltage VFB VOUT programmed for 3V Efficiency VIN=12V, VOUT=3V, ILOAD=2A % 75 ALL OUTPUT VOLTAGE Feedback Bias Current IBIAS Adjustable Version Only, VFB=1.3V 10 50 nA Oscillator Frequency fOSC (Note 1) 127 150 173 kHz Saturation Voltage VSAT IOUT=2A (Note 2, 3) 1.16 1.4 V (Note 3) 100 Max Duty Cycle (ON) DC % (Note 4) 0 Min Duty Cycle (OFF) Current Limit ICL Peak Current (Notes 2, 3) 2 A Output=0V (Notes 2, 4) A 50 Output Leakage Current IL Output=-1V (Note 5) 2 30 mA Quiescent Current IQ (Note 4) 5 10 mA Standby Quiescent Current ISTBY ON/OFF pin=5V (OFF) (Note 5) 80 200 A ON/OFF CONTROL ON/OFF Pin Logic Input VIH Low (Regulator ON) 1.3 0.6 V Threshold Voltage VIL High (Regulator OFF) 2.0 1.3 V ON/OFF Pin Input Current IH VLOGIC=2.5V (Regulator OFF) 5 15 A IL VLOGIC=0.5V (Regulator ON) 0.02 5 A Note 1: The switching frequency is reduced when the second stage current limit is activated. 2: No diode, inductor or capacitor connected to output pin. 3: Feedback pin removed from output and connected to 0V to force the output transistor switch ON. 4: Feedback pin removed from output and connected to 12V for the 2.5V 3.3V, 5V, and the ADJ. version, and 15V for the 12V version, to force the output transistor switch OFF. 5: VIN = 30V
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TYPICAL APPLICATION
(Fixed Output Voltage Versions)
LINEAR INTEGRATED CIRCUIT
FB 12V DC Input VIN + C IN Capacitor 1 3 UTC P1696 -5.0V 4 on / off Output L1 Inductor + D1 Schottky Diode Co Capacitor 5.0V/2A Output Load
2
5,6,7,8 Gnd
ADJUSTABLE OUTPUT VOLTAGE VERSIONS
CFF R1 1k +
UNREGULATED + DC INPUT
R2
Locate The Programming Resistors Near The Feedback Pin Using Short Leads Keep Feedback Wiring Away From Inductor Flux Output 2
ON/OFF
3 Feedback L1 D1
+VIN P 1696-ADJ 1 5,6,7,8 GND 4 CIN
Regulated Output
+
COUT
L O A D
Heavy Lines Must be Kept Short and Use Ground Plane Construction for Best Results
VOUT
(
R1 R1 + R2
) = VREF
VOUT = VREF (1+
R2 R1
)
Where VREF = 1.23V R2 = R1(
VOUT VREF
-1)
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TYPICAL CHARACTERISTICS
Normalized Output Voltage 5.15 VIN=20V,LLOAD=2A Normalized at TJ=25 5.10
LINEAR INTEGRATED CIRCUIT
Line Regulation 5.15 5.10 VOUT=5V, I LOAD=100mA Normalized at TJ=25
Output Voltage (V)
Output Voltage (V)
5.05
5.05
5.00 4.95
5.00
4.95
4.90 4.85
4.90 4.85
-50
-25
0
25
50
75
)
100
125
0
5
10
15
20
25
30
Junction Temperature (
Input Voltage (V)
Efficiency 90 2A Load 1.60 1 : -40 2 : 25 3 : 125
Switch Saturation Voltage
85 5.0V
Saturation Voltage (V)
1.40
80
Efficiency (%)
1.20
75 3.3V 70
1.00
1 2 3
65 60 0 5 10 15 20 25 30
0.80
0.60 0 0.5 1 2 Switch Current(A) 3
Input Voltage (V)
Switch Current Limit 5.00 VIN =12V, VOUT =5V 4.75
Switch Current Limit (A)
Operating Quiescent Current 30.0 4.5V< VIN < 30V ISWITCH =0 25.0
Supply Current (mA)
4.50
20.0 Switch ON 15.0
4.25
4.00
10.0 Switch OFF 5.00 0.00
3.75 3.50 -50 -25 0 25 50 75 ) 100 125
-50
-25
0
25
50
75 )
100
125
Junction Temperature (
Junction Temperature (
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TYPICAL CHARACTERISTICS(Cont.)
Shutdown Quiescent Current 200 VON/OFF =5V 1 : -40 2 : 25 3 : 125
Supply Voltage (V)
LINEAR INTEGRATED CIRCUIT
Minimum Operating Supply Voltage 6.0 VOUT=1.23V ILOAD =200mA 5.0 4.0 3.0 2.0 1.0 0.0 -50
160
Current (uA)
120
80 1 40 2 3
00 0 5 10 15 20 25 30 Supply Voltage (V)
-25
0
25
50
75 )
100
125
Juntion Temperature (
ON/OFF Threshold Voltage 6.0 5.0
Threshold Voltage (V)
ON/OFF Pin Current (Sinking) 180 VIN =40V -40 < TJ <125 150 120 90 60 30
3.0 2.0 1.0
OFF
ON 0.0 -50 -25 0 25 50 75 ) 100 125 0.0 0.0 10 15 20 22 23 24 25
Current (uA)
4.0
Junction Temperature (
ON/OFF Pin Voltage (V)
Switch Frequency 300 250 200 150 100 50 0.0 -50 VIN =20V, I LOAD=2A Normalized at TJ=25 60 50
Bias Current (nA)
Feedback Pin Bias Current
Frequency (kHz)
40 30 20 Adjustable Version Only 10 0.0
-25
0
25
50
75 )
100
125
-50
-25
0
25
50
75
100
125
Junction Temperature (
Junction Temperature ( )
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LINEAR INTEGRATED CIRCUIT
UTC assumes no responsibility for equipment failures that result from using products at values that exceed, even momentarily, rated values (such as maximum ratings, operating condition ranges, or other parameters) listed in products specifications of any and all UTC products described or contained herein. UTC products are not designed for use in life support appliances, devices or systems where malfunction of these products can be reasonably expected to result in personal injury. Reproduction in whole or in part is prohibited without the prior written consent of the copyright owner. The information presented in this document does not form part of any quotation or contract, is believed to be accurate and reliable and may be changed without notice.
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