AAT2552_08 Datasheet, PDF (4/31 Pages) Advanced Analogic Technologies – Total Power Solution for Portable Applications

SystemPower^TM
PRODUCT DATASHEET
AAT2552178
Total Power Solution for Portable Applications
Electrical Characteristics¹
V_INB = 3.6V; T_A = -40°C to +85°C, unless otherwise noted. Typical values are T_A = 25°C.
Symbol Description
Step-Down Converter
V_IN
Input Voltage
V_UVLO
UVLO Threshold
V_OUT
Output Voltage Tolerance²
V_OUT
Output Voltage Range
I_Q
Quiescent Current
I_SHDN
Shutdown Current
I_LIM
P-Channel Current Limit
R_DS(ON)H
High-Side Switch On Resistance
R_DS(ON)L
Low-Side Switch On Resistance
I_LXLEAK
LX Leakage Current
ΔV_OUT/ΔV_OUT Load Regulation
ΔV_Linereg/ΔV_IN Line Regulation
V_FB
Feedback Threshold Voltage Accuracy
I_FB
FB Leakage Current
F_OSC
Oscillator Frequency
T_S
Startup Time
T_SD
Over-Temperature Shutdown Threshold
T_HYS
Over-Temperature Shutdown Hysteresis
V_EN(L)
Enable Threshold Low
V_EN(H)
Enable Threshold High
I_EN
Input Low Current
Linear Regulator
V_OUT
V_OUT
V_FB
V_IN
V_DO
ΔV_OUT/
V_OUT*ΔV_IN
I_OUT
I_SC
I_Q
I_SHDN
Output Voltage Tolerance
Output Voltage Range
Feedback Voltage Accuracy
Input Voltage
Dropout Voltage⁴
Line Regulation
Output Current
Short-Circuit Current
Quiescent Current
Shutdown Current
PSRR
Power Supply Rejection Ratio
T_SD
T_HYS
e_N
T_C
V_EN(L)
V_EN(H)
I_EN
Over-Temperature Shutdown Threshold
Over-Temperature Shutdown Hysteresis
Output Noise
Output Voltage Temperature Coefficient
Enable Threshold Low
Enable Threshold High
Enable Input Current
Conditions
V_INB Rising
Hysteresis
I_OUTB = 0 to 300mA, V_INB = 2.7V to 5.5V
No Load
V_ENB = GND
V_INB = 5.5V, V_LX = 0 to V_INB
I_OUTB = 0mA to 300mA
V_INB = 2.7V to 5.5V
V_INB = 3.6V
V_OUTB = 1.0V
From Enable to Output Regulation
V_INB = V_ENB = 5.5V
I_OUTA = 1mA
to 300mA
T_A = 25°C
T_A = -40°C to +85°C
I_OUTA = 300mA; V_OUT = 3.3V
V_INA = V_OUTA + 1 to 5.0V
V_OUTA > 2.0V
V_OUTA < 0.4V
V_INA = 5V; V_ENA = V_IN
V_INA = 5V; V_ENA = 0V
1kHz
I_OUTA =10mA
10kHz
1MHz
e_NBW = 100Hz to 100kHz
V_INA = V_ENA = 5.5V
Min
2.7
-3.0
0.6
300
0.591
1.4
-1.0
-1.5
-2.5
1.2
1.22
V_OUT + V_DO3
300
1.4
Typ
250
45
0.3
0.5
0.4
0.1
0.6
1.5
120
140
15
1.24
400
400
85
70
50
30
140
15
95
8
Max
7.5
2.6
3.0
V_INB
90
1.0
1.0
0.609
0.2
0.6
1.0
1.5
2.5
3.3
1.26
5.5
650
0.09
150
1.0
0.6
1.0
Units
V
V
mV
%
V
μA
μA
mA
Ω
Ω
μA
%
%/V
V
μA
MHz
μs
°C
°C
V
V
μA
%
V
V
V
mV
%/V
mA
mA
μA
μA
dB
°C
°C
μV_RMS/√Hz
ppm/°C
V
V
μA
1. The AAT2552 is guaranteed to meet performance specifications over the -40°C to +85°C operating temperature range and is assured by design, characterization, and correla-
tion with statistical process controls.
2. Output voltage tolerance is independent of feedback resistor network accuracy.
3. VDO is defined as VIN - VOUT when VOUT is 98% of nominal.
4. For VOUT <2.3V, VDO = 2.5V - VOUT.
4
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2552.2008.02.1.2