850kHz 1A Buck DC/DC Converter
Electrical Characteristics
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
I
LIM
I
Q
ΔV
OUT
(V
OUT
*ΔV
IN
)
ΔV
OUT
/V
OUT
F
OSC
R
DSON(H)
R
DSON(L)
V
EN(H)
V
EN(L)
I
EN
V
UVLO
V
UVLO(hys)
T
SD
T
HYS
I
SHDN
V
TH(POK)
R
POK
AAT1152
Description
Operation Voltage
DC Output Voltage Tolerance
Current Limit
Quiescent Supply Current
Load Regulation
Line Regulation
Oscillator Frequency
High-Side Switch On Resistance
Low-Side Switch On Resistance
Enable Input High Voltage
Enable Input Low Voltage
Enable Pin Leakage Current
Under-Voltage Lockout
Conditions
I
OUT
= 500mA
T
A
= 25°C
Full Temp
Min
2.7
-1.0
-2.0
1.2
Typ
Max
5.5
1.0
2.0
Units
V
%
A
μA
%
%/V
kHz
mΩ
mΩ
V
V
μA
V
mV
°C
°C
T
A
= 25°C
No Load, V
FB
= 0
V
IN
= 4.2V, I
LOAD
= 0 to 1A
V
IN
= 2.7V to 5.5V
T
A
= 25°C
T
A
= 25°C
T
A
= 25°C
V
IN
= 2.7V to 5.5V
V
IN
= 2.7V to 5.5V
V
EN
= 5.5V
V
IN
Rising
V
IN
Falling
700
160
3
0.2
850
110
100
300
1000
150
150
0.6
1
2.5
1.4
1.2
250
140
15
1
90
88
4
Under-Voltage Lockout Hysteresis
Over-Temperature Shutdown
Threshold
Over-Temperature Shutdown
Hysteresis
Shutdown Current
V
EN
= 0, V
IN
= 5.5V
V
FB
Ramping Up
Power-OK Threshold
V
FB
Ramping Down
Power-OK Pull-Down
On Resistance
μA
% of
V
FB
Ω
4
1152.2006.09.1.7
ANALOGICTECH [ ADVANCED ANALOGIC TECHNOLOGIES ]
