Dual 400mA High Frequency Buck Converter
Electrical Characteristics
1
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
V
OUT
I
Q
I
SHDN
I
LX_LEAK
I
FB
I
LIM
R
DS(ON)H
R
DS(ON)L
ΔV
LINE
F
OSC
T
S
T
SD
T
HYS
V
EN(L)
V
EN(H)
I
EN
AAT2512
Description
Input Voltage
Output Voltage Tolerance
Output Voltage Range
Quiescent Current
Shutdown Current
LX Leakage Current
Feedback Leakage
P-Channel Current Limit
High Side Switch On Resistance
Low Side Switch On Resistance
Line Regulation
Oscillator Frequency
Start-Up Time
Over-Temperature Shutdown
Threshold
Over-Temperature Shutdown
Hysteresis
Enable Threshold Low
Enable Threshold High
Input Low Current
Conditions
I
OUT
= 0 to 400mA;
V
IN
= 2.7V to 5.5V
Per Channel
EN1 = EN2 = GND
V
IN
= 5.5V, V
LX
= 0 to V
IN
V
FB
= 1.0V
Both Channels
Min
2.7
-3.0
0.6
Typ
Max Units
5.5
3.0
V
%
V
µA
µA
µA
µA
A
Ω
Ω
%
MHz
µs
°C
°C
0.6
V
V
µA
27
V
IN
70
1.0
1.0
0.2
V
IN
= 2.7V to 5.5V
From Enable to Output Regulation;
Both Channels
1.2
0.45
0.40
0.2
1.4
150
140
15
1.4
-1.0
V
IN
= V
FB
= 5.5V
1.0
1. The AAT2512 is guaranteed to meet performance specifications over the -40°C to +85°C operating temperature range and is assured
by design, characterization, and correlation with statistical process controls.
4
2512.2006.06.1.4
ANALOGICTECH [ ADVANCED ANALOGIC TECHNOLOGIES ]
