Technology Licensed from International Rectifier
APU1206/APU1207/APU1208/APU1209
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1A VERY LOW DROPOUT POSITIVE FIXED AND ADJUSTABLE REGULATORS 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.
FEATURES
Low Dropout Voltage (500mV at 1A) 1% Voltage Reference Accuracy Low Ground Current 1µA 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
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.
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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 ...................................... -65°C To 150°C Operating Junction Temperature Range ..................... 0°C To 135°C
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
θJA=70°C/W for 0.5" Sq pad 8-PIN PLASTIC SOIC (M) APU1208
TOP VIEW
Tab is Gnd
2 1
θJA=90°C/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
θJA=55°C/W for 1" Sq pad
Flag VIN VOUT Adj
1 2 3 4
8 7 6 5
Gnd Gnd Gnd Gnd
θJA=55°C/W for 1" Sq pad
Enable VIN VOUT Adj
1 2 3 4
8 7 6 5
Gnd Gnd Gnd Gnd
θJA=55°C/W for 1" Sq pad
ELECTRICAL SPECIFICATIONS
Unless otherwise specified, these specifications apply over CIN=COUT=10µF, VIN=Vo+1V, VOUT=VFB (For adjustable version only), and TA=25°C. Typical values refer to TA=25°C. 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=25¢J (Note 4) Vo + 1V
