PRODUCT DATASHEET
AAT2784
SystemPower
TM
Electrical Characteristics
1
3-Channel Step-Down DC/DC Converter
V
IN
= V
P
= 3.6V; T
A
= -40°C to 85°C, unless noted otherwise. Typical values are at T
A
= 25°C.
Symbol
V
IN
V
OUT
V
OUT
I
Q1,2
I
Q3
I
SHDN
I
LX_LEAK
I
LX_LEAK
I
FB
I
LIM1,2
I
LIM3
R
DS(ON)H1,2
R
DS(ON)L1,2
R
DS(ON)H3
R
DS(ON)L3
ΔV
LOADREG
ΔV
LINEREG
F
OSC1,2
F
OSC3
T
S
T
SD
T
HYS
V
IL
V
IH
I
EN
Description
Input Voltage
Output Voltage Tolerance
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
High Side Switch On-Resistance
Low Side Switch On-Resistance
High Side Switch On-Resistance
Low Side Switch On-Resistance
Load Regulation
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
Enable Threshold High
Enable Input Current
Conditions
I
OUT1
= 0 to 1.5A; I
OUT2,3
= 0 to 300mA;
V
IN
= 2.7 to 5.5V
Per Channel, No Load
No Load
V
EN1
= V
EN2
= V
EN3
= GND
V
IN
Open, V
LX
= 5.5V; V
EN
= 0V
V
IN
= 5.5V, V
LX
= 0 to V
IN
V
FB
= 1.0V
Min
2.7
-3.0
0.6
Typ
Max
5.5
3.0
Units
V
%
V
μA
μA
μA
μA
μA
μA
A
A
mΩ
mΩ
mΩ
mΩ
%
%
MHz
MHz
μs
°C
°C
V
V
μA
50
45
V
IN
100
90
1.0
1.0
1.0
0.2
I
LOAD1,2
= 0 to 300 mA; I
LOAD3
= 0 to 1.5A
V
IN
= 2.7 to 5.5V
From Enable to Output Regulation
1.8
3.81
480
400
150
120
0.8
0.5
1.8
1.8
150
140
15
0.6
1.4
-1.0
V
IN
= V
EN
= 5.5V
1.0
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.
4
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