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Technology Licensed from International Rectifier
APU1206/APU1207/APU1208/APU1209
1A VERY LOW DROPOUT POSITIVE FIXED AND ADJUSTABLE REGULATORS FEATURES
Low Dropout Voltage (500mV at 1A) 1% Voltage Reference Accuracy Low Ground Current 1A Maximum Quiescent Current in Shutdown (APU1207, APU1208) Fast Transient Response Current Limit and Thermal Shutdown Error Flag Signal for Output out of Regulation (APU1207, APU1208) RoHS Compliant
DESCRIPTION
The APU1206 family of devices are ultra low dropout 1A regulators using PNP transistor as the pass element. These products are ideal when a single input supply is only available and the dropout voltage is less than 1V, exceeding the minimum dropout characteristics of NPN/ PNP hybrid regulators. One common application of these regulators is where input is 3.3V and a 2.5V output is needed. Besides the low dropout of less than 0.5V, other features of the family of the parts are: micro-power shutdown capability and output UVLO detection where Flag pin is switched low when output is below 5% of its nominal point.
APPLICATIONS
2.5V Supply from 3.3V Input for the new generation of Logic ICs Computer Mother Board, Add-On Cards High Efficiency Post Regulator in Switch Mode Power Supply (SMPS)
TYPICAL APPLICATION
VOUT
3
C2
VOUT
APU1206XX Gnd 2
VIN
1
VIN
C1
Figure 1 - Typical application of the 1206-XX in a 3-Pin SOT-223 package.
Data and specifications subject to change without notice.
200706062-1/9
APU1206/APU1207/APU1208/APU1209
PACKAGE ORDER INFORMATION
TJ (C) 0 To 125 0 To 125 0 To 125 0 To 125 0 To 125 0 To 125 0 To 125 0 To 125 2-PIN TO-252(H) APU1206H-18 APU1206H-25 APU1206H-33 NA NA NA NA NA 3-PIN SOT-223(K) APU1206K-18 APU1206K-25 APU1206K-33 NA NA NA NA NA Basic Part 8-PIN PLASTIC SOIC(M) NA NA NA APU1207M-18 APU1207M-25 APU1207M-33 APU1208M APU1209M VOLTAGE 1.8V 2.5V 3.3V 1.8V 2.5V 3.3V Adj Adj PIN FUNCTIONS VIN, VOUT, Gnd VIN, VOUT, Gnd VIN, VOUT, Gnd VIN, VOUT, Gnd, Enable, Flag VIN, VOUT, Gnd, Enable, Flag VIN, VOUT, Gnd, Enable, Flag VIN, VOUT, Gnd, Flag, Adj VIN, VOUT, Gnd, Enable, Adj
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APU1206/APU1207/APU1208/APU1209
ABSOLUTE MAXIMUM RATINGS
Input Voltage (VIN) .................................................... 10V Enable Input Voltage ................................................ 10V Storage Temperature Range ...................................... -65C To 150C Operating Junction Temperature Range ..................... 0C To 135C
PACKAGE INFORMATION
2-PIN PLASTIC TO-252 (D-Pak) APU1206
FRONT VIEW 3
3-PIN PLASTIC SOT-223 (K) APU1206
TOP VIEW 3
VOUT
Tab is Gnd
1
VOUT Gnd VIN
VIN
JA=70C/W for 0.5" Sq pad 8-PIN PLASTIC SOIC (M) APU1208
TOP VIEW
Tab is Gnd
2 1
JA=90C/W for 0.4" Sq pad
APU1207
TOP VIEW
APU1209
TOP VIEW
Enable VIN VOUT Flag
1 2 3 4
8 7 6 5
Gnd Gnd Gnd Gnd
JA=55C/W for 1" Sq pad
Flag VIN VOUT Adj
1 2 3 4
8 7 6 5
Gnd Gnd Gnd Gnd
JA=55C/W for 1" Sq pad
Enable VIN VOUT Adj
1 2 3 4
8 7 6 5
Gnd Gnd Gnd Gnd
JA=55C/W for 1" Sq pad
ELECTRICAL SPECIFICATIONS
Unless otherwise specified, these specifications apply over CIN=COUT=10F, VIN=Vo+1V, VOUT=VFB (For adjustable version only), and TA=25C. Typical values refer to TA=25C. Low duty cycle pulse testing is used which keeps junction and case temperatures equal to the ambient temperature. PARAMETER Initial Voltage Accuracy (see Table 1 for nominal values) Line Regulation Load Regulation (Note 1) Output Voltage Temp Coef. Dropout Voltage (Note 2) SYM Vo VI VL TEST CONDITION Io=10mA, TA=25J (Note 4) Vo + 1V0.5 0.5 20 100 300 500
Ground Current (Note 3)
Current Limit Minimum Input Voltage APU1208, APU1209 Adjust Pin Current Minimum Load Current
VO(T) VI(O) Io=100mA (Note 4) Io=500mA (Note 4) Io=1000mA (Note 4) IQ VIN=Vo + 1 for all conditions: Io=100mA (Note 4) Io=500mA (Note 4) Io=1000mA (Note 4) ICL Vo=5% Below Regulation Point VIN(min) IADJ IO(min) VIN=2.5V, Vo=VADJ (Note 4)
mA
A V A mA
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APU1206/APU1207/APU1208/APU1209
PARAMETER APU1207, APU1209 Ground Current - SD Activated Enable Pin Input LO Voltage Enable Pin Input HI Voltage Enable Pin Input LO Current Enable Pin Input HI Current APU1207, APU1208 Flag Output Threshold Voltage Flag Output Hysteresis Voltage Flag Output Saturation Voltage SYM IQ(SD) VEN(L) VEN(L) TEST CONDITION Enable=Open Regulator OFF (Note 4) Regulator ON (Note 4) VEN(L)=0V to 0.8V (Note 4) VEN(L)=2V to Vin (Note 4) MIN TYP 0.01 2 0.1 100 5 0.8 400 230 2 600 MAX 1 0.8 UNITS A V V A A %VO %VO mV
VTH(FG) VHYS Output Ramping Up VF(SAT) Io=5mA Io=500A
Note 1: Low duty cycle pulse testing with Kelvin connections is required in order to maintain accurate data. Note 2: Dropout voltage is defined as the minimum differential voltage between VIN and VOUT required to maintain regulation at VOUT. It is measured when the output voltage drops 1% below its nominal value.
Note 3: Ground current is the regulator quiescent current plus the pass transistor current. The total current from the supply is the sum of the load current plus the ground pin current. Note 4: The specification applies for the junction temperature of 0 to +125J .
PIN DESCRIPTIONS
PIN DESCRIPTION The input pin of the regulator. Typically a large storage capacitor is connected from this pin to ground to insure that the input voltage does not sag below the minimum drop out voltage during the load transient response. This pin must always be 0.6V higher than VOUT in order for the device to regulate properly. VOUT The output of the regulator. A minimum of 2.2F capacitor must be connected from this pin (All devices) to ground. Gnd Ground pin. This pin must be connected to the lowest potential in the system and all other (All devices) pins must be at higher potential with respect to this pin. Enable Enable pin. A low signal or left open on this pin shuts down the output. This pin must be tied (APU1207, APU1209) HI or to VIN for normal operation. Flag An open collector output that switches low when the output voltage drops about 4% below (APU1207, APU1208) its expected regulated voltage. Adj A resistor divider from this pin to the VOUT pin and ground sets the output voltage. (APU1208, APU1209) PIN SYMBOL VIN (All devices)
APPLICATION INFORMATION
Stability The APU120X series of regulators require the use of an output capacitor as part of the frequency compensation in order to make the regulator stable. A minimum of 2.2F capacitance and the ESR in the range of 0.5 to 2[ insures the stability of the system.
Part Number APU1206-18 APU1206-25 APU1206-33 APU1207-18 APU1207-25 APU1207-33 APU1208 APU1209
Output Voltage 1.8V 2.5V 3.3V 1.8V 2.5V 3.3V 1.24V 1.24V
Table 1 - Output voltage vs. part number.
4/9
APU1206/APU1207/APU1208/APU1209
TYPICAL APPLICATION
VOUT
3
C2
VOUT
APU1206XX Gnd 2
VIN
1
VIN
C1
Note: Tab must also be connected to ground.
Figure 2 - Typical application of APU1206. Ref Desig C1 C2 Description Capacitor Capacitor Qty 1 1 Part # 10F, Tantalum 10F, Tantalum Manuf AVX AVX
5 Gnd 6 Gnd 7 Gnd 8 Gnd
Flag VOUT VIN Enable
SD Enable
4 3
R1
Error Flag VOUT
C2
APU1207
2 1
VIN
C1
Figure 3 - Typical application of APU1207. Ref Desig C1 C2 R1 Description Capacitor Capacitor Resistor Qty 1 1 1 Part # 10F, Tantalum 10F, Tantalum 10K[ ,5% Manuf AVX AVX Panasonic
5/9
APU1206/APU1207/APU1208/APU1209
TYPICAL APPLICATION
5 6 7 8
Gnd Gnd Gnd Gnd Adj VOUT VIN Flag
4 3 2 1
R3 R2
VOUT
R1 C2
APU1208
Error Flag VIN
C1
Vo = 1.24 X 1 +
(
R1 R2
)
Figure 4 - Typical application of APU1208 in 3.3V to 2.5V regulator. Ref Desig C1 C2 R1 R2 R3 Description Capacitor Capacitor Resistor Resistor Resistor Qty 1 1 1 1 1 Part # 10F, Tantalum 10F, Tantalum 127[ , 1% 124[ , 1% 10K[ , 5% Manuf AVX AVX
6/9
APU1206/APU1207/APU1208/APU1209
TYPICAL APPLICATION
5 6 7 8
Gnd Gnd Gnd Gnd Adj VOUT VIN Enable
4 3 2
R2
VOUT
R1 C2
APU1209
1
SD
Enable
VIN
C1
Vo = 1.24 X
( 1 + R1 ) R2
Figure 5 - Typical application of APU1209 in 3.3V to 2.5V regulator. Ref Desig C1 C2 R1 R2 Description Capacitor Capacitor Resistor Resistor Qty 1 1 1 1 Part # 10F, Tantalum 10F, Tantalum 127[ , 1% 124[ , 1% Manuf AVX AVX
7/9
APU1206/APU1207/APU1208/APU1209
CHARACTERISTICS
APU1209 Line Regulation @ 5mA to 100mA
Vout Percent Error Vout 1.25 1.245 1.24 1.235 1.23 1.225 1.22 1.215 1.21 1.205 1.2
4. 5V 6. 5V 8. 5V 9. 5V 7. 5V 5. 5V 3. 5V 2. 5V V V V V V 4V 6V 9V 12 11 11 10 10 .5 .5 8V 7V 5V 3V 2V
% Error 5.00% 4.50% 4.00% 3.50% 3.00% 2.50% 2.00% 1.50% 1.00% 0.50% 0.00%
Input Voltage
Figure 6
APU1209 Maximum Output Current ~ 1.25A while in the current limit mode.
APU1209 Output Voltage in Yellow. A DC offset equal to the output voltage is applied to improve resolution. The output is regulating current in this mode.
Figure 7
5 Sep 2001 15:15:05
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APU1206/APU1207/APU1208/APU1209
CHARACTERISTICS
APU1209 Voltage Drop-out Variation w ith Am bient Tem perature w ith various load currents APU1209 Vout Variation w ith Ambient Tem perature w ith Vin @ 3.5V and 12V
2.5 2.4 2.3 2.2 2.1 mA 2.0 1.9 1.8 1.7 1.6 1.5 -50 0 50 Tem pe ra ture ( J ) 100 150 100 mA 500 mA 1A
2.55 2.54 2.53 2.52 2.51 2.50 2.49 2.48 2.47 2.46 -50 0 50 100 150 3.5 V 12V
Figure 8
Figure 9
APU1209 Ground Current Variation with Ambient Temperature
100 90 80 70 60 mA 50 40 30 20 10 0
-50 0 50 100 150
Ambie nt Tem pe ra ture (J )
Figure 10
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