AAT2514 Datasheet, PDF (4/16 Pages) Advanced Analogic Technologies – Dual Channel 600mA Step-Down Converter

AAT2514
Dual Channel 600mA Step-Down Converter
Electrical Characteristics
V_IN = V_EN = 3.6V, T_A = 25°C, unless otherwise noted.
Symbol Description
Step-Down Converter
V_IN Input Voltage Range
I_Q
Input DC Supply Current
V_FB
Regulated Feedback
Voltage
I_FB
FB Input Bias Current
∆V_OUT/ Output Voltage Line
V_OUT/∆V_IN Regulation
∆V_OUT/ Output Voltage Load
V_OUT/∆I_OUT Regulation
I_LIM Maximum Output Current
T_S
Startup Time
T_SD
T_HYS
F_OSC
R_DS(ON)
V_EN(L)
V_EN(H)
I_EN
Over-Temperature
Shutdown Threshold
Over-Temperature
Shutdown Hysteresis
Oscillator Frequency
P-Channel MOSFET
N-Channel MOSFET
Peak Inductor Current
Enable Threshold Low
Enable Threshold High
EN Input Current
Power-On Reset
Threshold (POR)
Conditions
Min Typ Max Units
2.5
5.5
V
Active Mode, V_FB = 0.5V
Shutdown Mode, EN1 = EN2 = 0V, V_IN = 4.2V
500
800
µA
0.3
2.0
T_A = 25°C, Channel 1 or 2
0.5880 0.6000 0.6120
T_A = 0°C ≤ T_A ≤ +85°C, Channel 1 or 2
T_A = -40°C ≤ T_A ≤ +85°C, Channel 1 or 2
(See Note 2)
0.5865 0.6000 0.6135 _V
0.5850 0.6000 0.6150
-30
30
nA
V_IN = 2.5V to 5.5V, I_OUT = 10mA
0.11 0.40 %/V
I_OUT = 10mA to 600mA
V_IN = 3.0V
From Enable to Output
Regulation
0.0015
600
100
140
%/mA
mA
µs
°C
V_FB = 0.6V
I_LX = 300mA
I_LX = 300mA
V_IN = 3V, V_FB = 0.5V; Duty Cycle <35%
V_FB Ramping Up
V_FB Ramping Down
Power-On Reset Delay
Power-On Reset On-Resistance
15
°C
1.2
1.5
1.8 MHz
0.35 0.45
0.28 0.45
Ω
1.20
A
0.3
V
1.5
V
-1.0
1.0 µA
8.5
%
-8.5
%
175
ms
100
Ω
1. Specifications over the temperature range are guaranteed by design and characterization.
2. The regulated feedback voltage is tested in an internal test mode that connects V_FB to the output of the error amplifier.
4
2514.2007.06.1.0