PRODUCT DATASHEET
AAT2504178
SystemPowerTM
Adjustable 3-Channel Regulator
Electrical Characteristics1
VIN = 3.6V; TA = -40°C to +85°C, unless otherwise noted. Typical values are TA = 25°C.
Symbol
Description
Conditions
Min Typ Max
Units
Bias Power Supply
IQ
ISHDN
Quiescent Current
Shutdown Current
ENA = ENB = EN = VIN; ILOAD = 0
ENA = ENB = EN = GND
VIN Rising
80
145
1.0
2.2
μA
μA
V
UVLO
Under-Voltage Lockout Voltage
Hysteresis
VIN Falling
250
mV
V
1.7
LDOA, LDOB
VLDO
Input Voltage
1.62
-1.5
-2.5
5.5
1.5
2.5
V
IOUT = 1mA
to 300mA
TA = 25°C
TA = -40°C to +85°C
VOUT
Output Voltage Tolerance
%
VFB
VDO
ΔVLINEREG/VIN
VEN(L)
VEN(H)
IOUT
Feedback Voltage
0.593
0.6
0.607
300
0.09
0.6
V
mV
%/V
V
Dropout Voltage2, 3
IOUT = 300mA
VIN = VOUT + 1 to 5.0V
Line Regulation4
Enable Threshold Low
Enable Threshold High
Output Current
Shutdown Current
Over-Temperature Shutdown Threshold
Over-Temperature Shutdown Hysteresis
1.4
300
V
VLDO (MIN) = 2.5
VIN = 5V
mA
μA
°C
°C
ISHT
TSD
THYS
1.0
140
15
LDOA
VPOK
Power-OK Trip Threshold
VOUT Rising, TA = 25°C
80
90
98
% of VOUT
VPOKHYS
VPOK(LO)
IPOK
Power-OK Hysteresis
Power-OK Output Voltage Low
Power-OK Output Leakage Current
1.0
% of VOUT
ISINK = 1mA
VPOK <5.5V, VOUT in Regulation
0.4
1.0
V
μA
Step-Down Converter
VIN
VOUT
VOUT
Input Voltage
2.7
-3.0
0.9
5.5
3.0
VIN
0.909
1.0
1.0
V
%
V
Output Voltage Tolerance
VOUT Programmable Range
Feedback Threshold Voltage
Shutdown Current
LX Leakage Current
Feedback Leakage
IOUT = 0 to 800mA; VIN = 2.7V to 5.5V
VFB
0.891
0.9
V
ISHDN
ILX_LEAK
IFB
EN = GND
VIN = 5.5, VLX = 0 - VIN
VFB = 1.0V
μA
μA
μA
A
0.2
1.2
ILIM
Current Limit
RDS(ON)H
RDS(ON)L
High Side Switch On Resistance
Low Side Switch On Resistance
280
160
0.2
0.2
2.0
140
15
mΩ
mΩ
%
%/V
MHz
°C
°C
V
ΔVLOADREG/VOUT Load Regulation
ΔVLINEREG/VIN
FOSC
ILOAD = 10 to 800mA
Line Regulation
Oscillator Frequency
Over-Temperature Shutdown Threshold
Over-Temperature Shutdown Hysteresis
Enable Threshold Low
1.6
2.4
TSD
THYS
VEN(L)
VEN(H)
IEN
0.6
1.0
Enable Threshold High
EN Input Leakage
1.4
-1.0
V
μA
VEN = 5V, VIN = 5V
1. The AAT2504 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. VDO is defined as VIN - VOUT when VOUT is 98% of nominal.
3. For VOUT < 1.5V, VDO = 1.8 - VOUT
.
4. CIN = 10μF.
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2504.2008.02.1.2
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