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| SI9176_04 Datasheet, PDF (3/17 Pages) Vishay Siliconix – High Performance Step-Down DC-DC Converter With Adjustable Output Voltage | |||
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Si9176
Vishay Siliconix
SPECIFICATIONS
Parameter
Modef
Converter Operation
Symbol
Test Conditions Unless Specified
â40_C to 85_C, VIN = VDD,, CIN = 10 mF, COUT = 4.7 mF
L = 2.2 mH, 2.6 V v VIN v 5.5 V, R1 = 11.3 kW, R2 = 20 kW
Maximum Output
Current
PWM
ILOAD
VIN = 3.6 V
Maximum Output
Current
PSM
Dropout Voltagee
Closed Loop Bandwidth
Load Regulationc
PWM
PSM
Line Regulation
PWM
PSM
PWM/PSM Switch Threshold Current
Maximum Inductor Peak Current Limit
On Resistance
P-Channel
N-Channel
Output Ripple Voltage
PWM
PSM
Efficiency
PWM
PSM
Frequency
PSM
ILOAD
VDD
BW
IAUpk
ILpk
rDS(on)
VIN = 3.6 V
VIN = 2.6 V, IOUT = 600 mA
VIN = 3.6 V
VOUT = 1.9 V @ 25_C
IOUT = 30 mA to 600 mA
IOUT = 30 mA to 75 mA
VOUT = 3.0 V, VIN = 3.5 V to 5.5 V
VIN = 3.6 V
0.05 W COUT(ESR)
VIN = 3.6 V, VOUT = 3.3 V
IOUT w 30 mA
IOUT = 600 mA
IOUT = 30 mA
IOUT = 600 mA
IOUT = 30 mA
Supply Current
Limits
Mina Typb Maxa Unit
600
mA
150
mA
190
300
mV
300
kHz
0.5
%
0.25
"0.1
%/V
"0.1
200
mA
1500
250
mW
250
60
80
mVp-p
90
%
80
20
kHz
Input Supply Current
Shutdown Supply Current
PWM
PSM
ISUPPLY
(VDD &
VIN)
ISD
IOUT = 0 mA, VIN = 3.6 V (not switching, FB = GND)
SD = Low
450
750
400
mA
2
Thermal Shutdown
Thermal Shutdown Temperaturec
Thermal Hysteresisc
TJ(S/D)
165
_C
20
Notes
a. The algebraic convention whereby the most negative value is a minimum and the most positive a maximum, is used in this data sheet.
b. Typical values are for DESIGN AID ONLY, not guaranteed or subject to production testing.
c. Guaranteed by design.
d. Settling times, ts, apply after ten.
e. Bypass is a device mode of operation, in which, the device is in 100% duty cycle. Bypass operation is possible in either PWM or PSM.
f. Operating modes are controlled with the MODE pin where Auto mode = MODE = LOW, PWM Mode = MODE = HIGH, and PSM mode = MODE = OPEN.
Document Number: 71753
S-41148âRev. C, 14-Jun-04
www.vishay.com
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