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ST1PS02 Datasheet(PDF) 6 Page - STMicroelectronics

Part # ST1PS02
Description  400 mA nano-quiescent synchronous step-down converter with digital voltage selection, Power Good and AUX switch
PDF  23 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

ST1PS02 Datasheet(HTML) 6 Page - STMicroelectronics

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5
Electrical characteristics
C1= 10 µF, C2= 10 µF, C3= 10 µF, L1=2.2 µH, VIN=3.6 V, VEN= VIN, VOUT=1.8 V, TA=25 °C unless otherwise
specified.
Table 6. Electrical characteristics
Symbol
Parameter
Test conditions
Min. Typ. Max. Unit
General section
IQ
Quiescent current
EN=VIN, AUX=GND, IOUT=0 µA,
VOUT=1.8 V, device does not switch,
VIN=2.5 V to 5.5 V
500 1000
nA
EN=VIN, AUX=VIN, IOUT=ouA, VOUT=1.8 V,
device not switching
2
4
µA
ISD
Shutdown current
EN=GND, shutdown current into VIN
10
200
nA
VUVLO
Undervoltage lockout threshold
VIN rising
1.63 1.72
V
VIN falling
1.51 1.57
V
Hysteresis
65
mV
Vth100%+ 100% mode leave threshold
VIN rising, 100% mode is disabled with VIN = VOUTnom
+ Vth100%+
300
mV
Vth100%- 100% mode enter threshold
VIN falling, 100% mode is entered with VIN = VOUTnom
+ Vth100%-
200
Output voltage
VOUT
Output voltage range
Output voltages are selected with pins D0, D1, D2
1.0
3.3
V
Output voltage accuracy
VIN = 3.6 V, whole VOUT range, IOUT=100 mA
-1.5
1.5
%
tONmin
Minimum on-time
VIN = 3.6 V, VOUT= 2 V, IOUT= 0 mA
225
ns
tOFFmin Minimum off-time
VIN=2.3V
50
ns
tstartupd Start-up delay time
VEN from low to high, VIN = 3.6 V, VOUT = 1.8 V
1
5
ms
ROUTDIS
Output discharge MOSFET on-
resistance
VEN= GND
30
Ω
Logic inputs (EN, D0, D1)
VIL
Low level input voltage threshold
VIN=1.8 V to 5.5 V
0.3
V
VIH
High level input voltage threshold
1
Power switch
RDS(on)
High-side MOSFET on-
resistance
VIN = 3.6 V, Isw = 400 mA
0.38 0.45
Ω
Low-side MOSFET on-resistance
0.14
0.2
ILIM1
High-side MOSFET switch
current limit
1.8 V ≤ VIN ≤ 5.5 V, CL=GND
750
1000
mA
ILIM2
High-side MOSFET switch
current limit
1.8 V ≤ VIN ≤ 5.5 V, CL=1 MΩ
500
800
ILIM3
High-side MOSFET switch
current limit
1.8 V ≤ VIN ≤ 5.5 V, CL=2.2 MΩ
250
mA
ST1PS02
Electrical characteristics
DS13206 - Rev 1
page 6/23



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