SI9142 Datasheet, PDF (2/11 Pages) Vishay Siliconix – Synchronous Buck Controller for High Performance Processors

Si9142
Vishay Siliconix
ABSOLUTE MAXIMUM RATINGS
Voltages Referenced to AGND
V_{SYNC_IN}. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.3 to 7 V
V_{SYNC_OUT} . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.3 to 7 V
V_CC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.3 to 15 V
Voltages Referenced to PGND
V_BST . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.3 to 20 V
V_PGND to V_AGND . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±2 V
V_L Short to GND . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Continuous
V_REF(OUT) Short to GND. . . . . . . . . . . . . . . . . . . . . . . . . . Continuous
Continuous Power Dissipation
20-Pin SOIC Wide-Body^b. . . .
(T_A
...
= 25°C)^a
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1.45
W
Operating Temperature Range. . . . . . . . . . . . . . . . . . . . . . . 0 to 70°C
Storage Temperature Range . . . . . . . . . . . . . . . . . . . . . . -65 to 125°C
Lead Temperature (soldering, 10 sec) . . . . . . . . . . . . . . . . . . . . 300°C
T_JMAX . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 150°C
Θ_JA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .86°C/W
Notes
a. Device mounted with all leads soldered or welded to PC board.
b. Derate 11.6 mW/°C above 25°C.
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute
maximum rating conditions for extended periods may affect device reliability.
RECOMMENDED OPERATING CONDITIONS
V_CC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4.75 V to 13.2 V
R_OSC . . . . . . . . . . . . . . . . . . . . . . 100 kΩ (100 kHz) to 10 kΩ (1 MHz)
V_{L(out), (in)} Capacitance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4.7 µF
V_L(out) Load . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ≤1 mA
V_REF Capacitance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.1 µF
V_REF Load . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ≤1 mA
Analog and Digital Inputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0 to V_L
SPECIFICATIONS
Parameter
Reference
Output Voltage
Regulation
Line Rejection
Oscillator
Operating Frequency
PWM Maximum Duty Cycle
SYNC High
SYNC Low
Output Drivers
Source/Sink I (Peak)
Supply
Quiescent Current PWM
Standby Current Shutdown
V_L
Output Voltage
Line Rejection
S-60752—Rev. C, 05-Apr-99
2
Test Conditions
Unless Otherwise Specifed
V_CC = 4.75 V to 13.2 V
Min^a
Limits
T_A = 0 to 70°C
Typ^b
Max^a
Unit
I_REF = 0
I_REF = 0 to 1 mA
At 10 kHz
1.30 -1.6%
1.30
1.30 +1.6%
V
-10
10
mV
80
dB
Sync = Open
f_OSC = 200 kHz
f_OSC = 400 kHz
I_OH = -100 µA
I_OL = 500 µA
100
1000
kHz
94
%
88
0.7 V_L
V
0.3 V_L
BST - LX = 4.5 V
H Driver
500
1000
mA
V_CC = 4.75 V
L Driver
500
1000
f_osc = 200 kHz
V_CC < 3.5 V
800
1200
µA
150
225
I_VL = 0, V_CC = 5.7 to 13.2 V
I_VL = 0, V_CC = 4.7 to 5.7 V
At 10 kHz
4.95
5.7
6.05
V
V_IN - 0.2 V
30
dB
FaxBack 408-970-5600, request 70750
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