PRODUCT DATASHEET
AAT2784
SystemPowerTM
3-Channel Step-Down DC/DC Converter
Electrical Characteristics1
VIN = VP = 3.6V; TA = -40°C to 85°C, unless noted otherwise. Typical values are at TA = 25°C.
Symbol Description
Conditions
Min
Typ
Max
Units
VIN
Input Voltage
2.7
5.5
V
IOUT1 = 0 to 1.5A; IOUT2,3 = 0 to 300mA;
VIN = 2.7 to 5.5V
VOUT
Output Voltage Tolerance
-3.0
0.6
3.0
%
VOUT
IQ1,2
IQ3
Output Voltage Range
Quiescent Current Channels 1, 2
Quiescent Current Channel 3
Shutdown Current
LX Reverse Leakage Current
LX Leakage Current
Feedback Leakage
P-Channel Current Limit
P-Channel Current Limit
VIN
100
90
1.0
1.0
1.0
0.2
V
μA
μA
μA
μA
μA
μA
A
Per Channel, No Load
No Load
VEN1 = VEN2 = VEN3 = GND
VIN Open, VLX= 5.5V; VEN = 0V
VIN = 5.5V, VLX = 0 to VIN
VFB = 1.0V
50
45
ISHDN
ILX
_
LEAK
ILX
_
LEAK
IFB
ILIM1,2
ILIM3
1.8
3.81
480
400
150
120
0.8
0.5
1.8
1.8
A
RDS(ON)H1,2 High Side Switch On-Resistance
mΩ
mΩ
mΩ
mΩ
%
RDS(ON)L1,2
RDS(ON)H3
RDS(ON)L3
ΔVLOADREG
ΔVLINEREG
FOSC1,2
FOSC3
Low Side Switch On-Resistance
High Side Switch On-Resistance
Low Side Switch On-Resistance
Load Regulation
ILOAD1,2 = 0 to 300 mA; ILOAD3 = 0 to 1.5A
VIN = 2.7 to 5.5V
Line Regulation
%
Oscillator Frequency Channels 1, 2
Oscillator Frequency Channel 3
Start-Up Time
Over-Temperature Shutdown Threshold
Over-Temperature Shutdown Hysteresis
Enable Threshold Low
MHz
MHz
μs
°C
°C
V
TS
TSD
THYS
VIL
VIH
IEN
From Enable to Output Regulation
150
140
15
0.6
1.0
Enable Threshold High
Enable Input Current
1.4
-1.0
V
ꢀA
VIN = VEN = 5.5V
1. The AAT2784 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.
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2784.2007.11.1.1
ANALOGICTECH [ ADVANCED ANALOGIC TECHNOLOGIES ]
