AAT2749 Datasheet, PDF (4/17 Pages) Skyworks Solutions Inc. – 3.0MHz Step-Down Converter and Low-V in LDO

DATA SHEET
AAT2749
3.0MHz Step-Down Converter and Low-V_IN LDO
Electrical Characteristics¹
V_IN = 3.6V; C_IN = C_{OUT_BUCK} = 4.7μF; C_{IN_LDO} = 1.0μF; C_{OUT_LDO} = 2.2μF; T_A = -40^oC to 85^oC unless otherwise noted.
Typical values are at T_A = 25^oC.
Symbol Description
Step-Down Converter
V_{IN_BUCK}
Input Voltage
V_{OUT_BUCK_ACC} Output Voltage Accuracy
V_{OUT_BUCK_TOL} Output Voltage Tolerance
V_OUTB/V_IN Line Regulation
I_LIM
P-Channel Current Limit
R_DS(ON)H
R_DS(ON)L
High Side Switch On Resistance
Low Side Switch On Resistance
I_{OUT_BUCK}
T_S
Out_BUCK Leakage Current
Start-Up Time
F_OSC
Oscillator Frequency
LDO Regulator
V_{IN_LDO}
Input Voltage
V_{OUT_LDO_ACC} Output Voltage Accuracy
V_{OUT_LDO_TOL} Output Voltage Tolerance
V_OUT/V_IN Line Regulation
ΔV_OUT/I_OUT Load Regulation
I_OUT(MAX) Maximum Output Current
I_LIM
Output Current Limit
V_DO
Dropout Voltage
System Quiescent Curent
I_Q
I_SHDN
Logic
V_CE(L)
V_CE(H)
I_CE
Thermal
T_SD
T_HYS
System Quiescent Current
Shutdown Current
Enable Threshold Low
Enable Threshold High
Input Low Current
Over-Temperature Shutdown Threshold
Over-Temperature Shutdown Hysteresis
Conditions
Min Typ Max Units
V_IN = 3.6V, 1mA Load, T_A = 25°C, PWM
Mode
0mA to 600mA load, V_IN = 2.5V to 5.5V
V_IN = 2.5V to 5.5V
V_{out_BUCK} = 1.8V
From Enable to Output Regulation
T_A = 25°C
2.3
5.5
591 600 609
-3.0
3.0
0.1
1000
360
200
20
50
3.0
V
mV
%
%/V
mA
mΩ
mΩ
μA
μs
MHz
V_{IN_BUCK} = 3.6V, V_{IN_LDO} = 1.8V, 1mA Load,
T_A = 25°C
0mA to 300mA load; V_{IN_LDO} = 2.5V to 5.5V
V_INL = 2.5V to 5.5V
0mA to 300mA load
V_{IN_BUCK} = 3.6V, V_{IN_LDO} = 1.8V, 200mA load
1.62
-2
-3
300
0.6
1.2
1
300
V_{IN_BUCK}
+2
+3
V
%
%
%/V
%
mA
A
mV
V_{OUT_BUCK} = 1.8V, No load on LDO, LL Mode
PWM Mode
V_CE = GND
100
μA
7
mA
1
μA
V_IN = V_OUT = 5.5V
1.4
-1.0
0.4
V
V
1.0
μA
140
°C
15
°C
Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [e-mail] • www.skyworksinc.com
4
202037A • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • June 8, 2012