sc1402 Semtech Corporation, sc1402 Datasheet - Page 2

• Manufacturer Part Number: sc1402
• Description: Multi-output, Low-noise Power Supply Controller For Notebook Computers
• Manufacturer: Semtech Corporation

ABSOLUTE MAXIMUM RATINGS
PARAMETERS
V+, BST3, BST5 to GND
PGND to GND
PHASE3 to BST3, and PHASE5 to BST5
VL to GND
REF,SYNC,SEQ,PSAVE,TIME_ON5,RESET to GND
RUN/ON3, SHDN to GND
VDD to GND
12 Out to GND
VL, REF Short to GND
12 Out Short to GND
REF Current
VL Current
12 Out Current
VDD Shunt Current
T
T
ELECTRICAL CHARACTERISTICS
(Unless otherwise noted: V+ = 15V, both PWMs on, SYNC = VL, VL load = 0mA, REF load = 0mA, PSAVE = 0V, T
Typical values are at T
PARAMETER
MAIN SMPS CONTROLLERS
Input Voltage Range
3V Output Voltage in
Adjustable Mode
3V Output Voltage in Fixed Mode V+ = 6V to 30V, 0mV < CSH3-CSL3 < 80mV,
5V Output Voltage in Adjustable
Mode
5V Output Voltage in Fixed Mode V+ = 6V to 30V, 0mV < CSH5-CSL5 < 80mV,
Output Voltage Adjust Range
Adjustable-Mode Threshold
Voltage
Load Regulation
Line Regulation
Current-Limit Threshold
PSAVE Mode Threshold
Soft-Start Ramp Time
Oscillator Frequency
Maximum Duty Factor
© 2000 SEMTECH CORP.
December 15, 2000
S
L
Lead soldering temperature
Storage Temperature
A
= +25°C).
V+ = 6V to 30V, CSH3-CSL3 = 0V,
CSL3 tied to FB3
FB3 = 0V
V+ = 6V to 30V, CSH5-CSL5 = 0V,
CSL5 tied to FB5
FB5 = 0V
From enable to 95% full current limit with
Either SMPS, 0V < CSH_-CSL_ < 80mV
PSAVE = VL or V12OUT < 11.9V
(1)
Either SMPS, 6V < V+ < 30V
CSH3-CSL3 or CSH5-CSL5
Multi-Output, Low-Noise Power Supply
Controller for Notebook Computers
PSAVE = 0V, not tested
Dual Mode comparator
respect to f
CONDITIONS
Either SMPS
SYNC = VL
SYNC = 0V
SYNC = VL
SYNC = 0V
OSC
652 MITCHELL ROAD
Note 2.
-0.3 to (VDD + 0.3V)
-0.3 to (V+ + 0.3V)
+300, 10 seconds
-0.3 to (VL+.3V)
2.45
3.17
2.45
4.82
REF
MIN
270
170
-50
6.0
0.5
80
10
-0.3 to +30V
Continuous
Continuous
-65 to +150
MAXIMUM
NEWBURY PARK CA 91320
-6 to +0.3
-0.3, +36
-0.3 to 6
± 0.3
+200
+50
+15
+5
TYP
-100
100
300
200
2.5
3.3
2.5
5.0
0.03
-0.8
512
25
94
96
A
=-40 to +85°C.
MAX UNITS
-150
30.0
2.55
3.43
2.55
5.18
120
330
235
1.3
5.5
40
SC1402
UNITS
sec.
sec.
mA
mA
mA
mA
°C
°C
V
V
V
V
V
V
V
V
%/V
clks
kHz
mV
mV
%
%
V
V
V
V
V
V
V
2