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| AAT2500M Datasheet, PDF (4/22 Pages) Advanced Analogic Technologies – 400mA Step-Down Converter and 300mA LDO | |||
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AAT2500M
400mA Step-Down Converter and 300mA LDO
Electrical Characteristics1
VIN_BUCK = VIN_LDO = 5.0V. TA = -40°C to +85°C unless noted otherwise. Typical values are at TA = +25°C.
Symbol Description
Conditions
Power Supply
VINBUCK,
VINLDO
Input Voltage
VUVLO Under-Voltage Lockout
IQ
Quiescent Current
ISHDN
Shutdown Current
Step-Down Converter
VIN Rising
VIN Falling
VEN = VIN, No Load
VEN = GND
VFB
Feedback Voltage Tolerance
`
ILXLEAK LX Reverse Leakage Current
IFB
Feedback Leakage
ILIM
P-Channel Current Limit
RDS(ON)H High Side Switch On Resistance
RDS(ON)L Low Side Switch On Resistance
âVOUT/VOUT Load Regulation
âVOUT/VOUT Line Regulation
FOSC
Oscillator Frequency
TS
Start-Up Time
LDO (VOUT = 3.3V)
VOUT
Output Voltage Tolerance
VOUT
Output Voltage Range
No Load, TA = 25°C
IOUT = 0 to 400mA; VIN = 2.7 to 5.5V
VIN = 5.5V, VLX = 0 to VIN, VEN = GND
VFB = 1.0 V
ILOAD = 0 to 400mA
VIN = 2.7V to 5.5V
From Enable to Output Regulation
No Load, 25°C
IOUT = 0 to 300mA
VIN
Input Voltage
IOUT
Output Current
ILIM
Current Limit
VDO
Dropout Voltage3
âVOUT/VOUT Load Regulation
âVOUT/VOUT Line Regulation
TS
Start-Up Time
Logic Signals
VEN(L)
VEN(H)
IEN(H)
TSD
Enable Threshold Low
Enable Threshold High
Enable Current Consumption
Over-Temperature Shutdown
Threshold
THYS
Over-Temperature Shutdown
Hysteresis
IOUT = 300mA
ILOAD = 0 to 300mA
VIN = 3.7V to 5.5V
From Enable to Output Regulation
Min
2.7
0.591
-3
-1.0
3.24
-3
VOUT +
VDO2
300
1.5
-1.0
Typ
2.35
130
1.2
0.4
0.25
0.25
0.3
1.8
120
3.30
1
160
1.2
0.6
100
150
15
Max
5.5
2.7
1.0
0.609
+3
1.0
0.2
3.36
3
5.5
240
0.6
1.0
Units
V
V
V
µA
µA
V
%
µA
µA
A
â¦
â¦
%
%
MHz
µs
V
%
V
mA
A
mV
%
%
µs
V
V
µA
°C
°C
1. Specification over the -40°C to +85°C operating temperature ranges is assured by design, characterization and correlation with sta-
tistical process controls.
2. To calculate the minimum LDO input voltage, use the following equation: VIN(MIN) = VOUT(MAX) + VDO(MAX).
3. VDO is defined as VIN - VOUT when VOUT is 98% of nominal.
4
2500M.2007.06.1.0
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