AAT1151
850kHz 700mA Synchronous Buck DC/DC Converter
Electrical Characteristics
1
V
IN
= V
CC
= V
P
= 5V, T
A
= -40°C to 85°C, unless otherwise noted. Typical values are at T
A
= 25°C.
Symbol
V
IN
V
OUT
V
UVLO
V
UVLO(HYS)
I
IL
I
IH
I
Q
I
SHDN
I
LIM
R
DS(ON)H
R
DS(ON)L
η
∆V
OUT
(V
OUT
*∆V
IN
)
∆V
OUT
/V
OUT
F
OSC
V
EN(L)
V
EN(H)
T
SD
T
HYS
Description
Input Voltage Range
Output Voltage Tolerance
Conditions
V
IN
= V
OUT
+ 0.2 to 5.5V,
I
OUT
= 0 to 700mA
V
IN
Rising
V
IN
Falling
V
IN
= V
FB
= 5.5V
V
IN
= V
FB
= 0 V
No Load, V
FB
= 0 V, V
IN
= 4.2V
T
A
= 25°C
V
EN
= 0 V, V
IN
= 5.5V
T
A
= 25°C
T
A
= 25°C
T
A
= 25°C
I
OUT
= 300mA, V
IN
= 3.5V
V
IN
= 4.2V, I
LOAD
= 0 to 700mA
V
IN
= 2.7V to 5.5V
T
A
= 25°C
Min
2.7
-3.0
Typ
Max
5.5
+3.0
2.5
Units
V
%
Under-Voltage Lockout
Under-Voltage Lockout Hysteresis
Input Low Current
Input High Current
Quiescent Supply Current
Shutdown Current
Current Limit
High Side Switch On Resistance
Low Side Switch On Resistance
Efficiency
Load Regulation
Line Regulation
Oscillator Frequency
Enable Threshold Low
Enable Threshold High
Over-Temperature Shutdown
Threshold
Over-Temperature Shutdown
Hysteresis
1.2
250
1.0
1.0
300
1.0
1.2
110
100
92
±0.9
±0.1
850
150
150
V
mV
µA
µA
µA
µA
A
mΩ
mΩ
%
%
%/V
KHz
V
V
°C
°C
210
600
1.4
1200
0.6
140
15
1. The AAT1151 is guaranteed to meet performance specifications over the -40°C to +85°C operating range and is assured by design,
characterization, and correlation with statistical process controls.
4
1151.2005.11.1.4
ANALOGICTECH [ ADVANCED ANALOGIC TECHNOLOGIES ]
