AAT1145_08 Datasheet, PDF (4/17 Pages) Advanced Analogic Technologies – 1.5A Step-Down Converter

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PRODUCT DATASHEET
AAT1145
1.5A Step-Down Converter
Electrical Characteristics¹
V_IN = 3.6V, T_A = -40°C to +85°C unless otherwise noted; typical values are T_A = 25°C.
Symbol
V_IN
V_OUT
I_Q
I_FB
V_FB
ΔV_LINEREG/
ΔV_IN
ΔV_LOADREG/
ΔI_OUT
V_FB
V_OUT
F_OSC
T_S
T_SD
T_HYS
I_LIM
R_DS(ON)
V_EN(L)
V_EN(H)
I_EN
Description
Input Voltage Range²
Output Voltage Range
Input DC Supply Active Mode
Current
Shutdown Mode
Feedback Input Bias Current
Regulated Feedback Voltage³
Line Regulation
Load Regulation
Output Voltage Accuracy
Oscillator Frequency
Startup Time
Over-Temperature Shutdown
Threshold
Over-Temperature Shutdown
Hysteresis
Peak Switch Current
P-CH MOSFET
N-CH MOSFET
Enable Threshold Low
Enable Threshold High
Input Low Current
Conditions
V_FB = 0.5V
V_EN = 0V, V_AIN = 5.5V
V_FB = 0.65V
T_A = 25°C
T_A = 0°C ≤ T_A ≤ 85°C
T_A = -40°C ≤ T_A ≤ 85°C
V_IN = 2.5V to 5.5V, I_OUT = 10mA
I_OUT = 10mA to 1500mA
V_IN = 2.5 to 4.2V, I_OUT = 10 to 1500mA
V_FB = 0.6V
From Enable to Output Regulation
V_IN = 3.6V
V_IN = 3.6V
V_IN = V_EN = 5.5V
Min
2.5
0.6
0.5880
0.5865
0.5850
Typ
300
0.1
0.6000
0.6000
0.6000
0.10
Max
5.5
V_IN
500
1
30
0.6120
0.6135
0.6150
0.20
Units
V
V
μA
μA
nA
V
%/V
0.20
%/A
-3
+3
%
0.96
1.2
1.44
MHz
1.3
ms
170
°C
10
°C
2.5
A
135
200
mΩ
95
150
0.3
V
1.5
V
-1.0
1.0
μA
1. The AAT1145 is guaranteed to meet performance specifications over the -40°C to +85°C operating temperature range and is assured by design, characterization, and correla-
tion with statistical process controls.
2. VIN should be not less than VOUT + VDROPOUT, where VDROPOUT = IOUT · (RDS(ON)PMOS + ESRINDUCTOR), typically VDROPOUT = 0.3V.
3. The regulated feedback voltage is tested in an internal test mode that connects VFB to the output of the error amplifier.
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1145.2008.01.1.2