AAT1121 Datasheet, PDF (4/20 Pages) Advanced Analogic Technologies – 1.5MHz, 250mA Step-Down Converter

AAT1121
1.5MHz, 250mA Step-Down Converter
Electrical Characteristics¹
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_UVLO
V_OUT
V_OUT
I_Q
I_SHDN
I_LIM
R_DS(ON)H
R_DS(ON)L
I_LXLEAK
ΔV_Linereg/ΔV_IN
V_FB
I_FB
F_OSC
T_S
T_SD
T_HYS
V_EN(L)
V_EN(H)
I_EN
Description
Input Voltage
UVLO Threshold
Output Voltage Tolerance²
Output Voltage Range
Quiescent Current
Shutdown Current
P-Channel Current Limit
High-Side Switch On Resistance
Low-Side Switch On Resistance
LX Leakage Current
Line Regulation
Feedback Threshold Voltage Accuracy
FB Leakage Current
Oscillator Frequency
Startup Time
Over-Temperature Shutdown Threshold
Over-Temperature Shutdown Hysteresis
Enable Threshold Low
Enable Threshold High
Input Low Current
Conditions
V_IN Rising
Hysteresis
V_IN Falling
I_OUT = 0 to 250mA,
V_IN = 2.7V to 5.5V
No Load
EN = GND
V_IN = 5.5V, V_LX = 0 to V_IN
V_IN = 2.7V to 5.5V
V_IN = 3.6V
V_OUT = 1.0V
From Enable to Output
Regulation
V_IN = V_EN = 5.5V
Min
2.7
2.0
-3.0
0.6
0.597
1.4
-1.0
Typ
250
30
600
0.59
0.42
0.2
0.606
1.5
100
140
15
Max
5.5
2.6
3.0
Units
V
V
mV
V
%
V_IN
1.0
1.0
0.615
0.2
V
μA
μA
mA
Ω
Ω
μA
%/V
V
μA
MHz
μs
°C
°C
0.6 V
V
1.0 μA
1. The AAT1121 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.
2. Output voltage tolerance is independent of feedback resistor network accuracy.
4
1121.2006.04.1.0