SC1185A Ver la hoja de datos (PDF) - Semtech Corporation
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SC1185A
Semtech Corporation
SC1185A Datasheet PDF : 12 Pages
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PROGRAMMABLE SYNCHRONOUS DC/DC
CONVERTER, DUAL LOW DROPOUT
REGULATOR CONTROLLER
SC1185
SC1185A
PRELIMINARY - January 6, 1999
PIN DESCRIPTION
Pin Pin Name
1 AGND
2 GATE1
3 LDOS1
4 LDOS2
5 VCC
6 REF
7 PWRGOOD(1)
8 CS-
9 CS+
10 PGNDH
11 DH
12 PGNDL
13 DL
14 BSTL
15 BSTH
16 EN(1)
17 VOSENSE
18 VID4(1)
19 VID3(1)
20 VID2(1)
21 VID1(1)
22 VID0(1)
23 LDOV
24 GATE2
Pin Function
Small Signal Analog and Digital Ground
Gate Drive Output LDO1
Sense Input for LDO1
Sense Input for LDO2
Input Voltage
Buffered Reference Voltage output
Open collector logic output, high if VO
within 10% of setpoint
Current Sense Input (negative)
Current Sense Input (positive)
Power Ground for High Side Switch
High Side Driver Output
Power Ground for Low Side Switch
Low Side Driver Output
Supply for Low Side Driver
Supply for High Side Driver
Logic low shuts down the converter;
High or open for normal operation.
Top end of internal feedback chain
Programming Input (MSB)
Programming Input
Programming Input
Programming Input
Programming Input (LSB)
+12V for LDO section
Gate Drive Output LDO2
Top View
AGND 1
GATE1
2
LDOS1
3
LDOS2
4
VCC
5
REF
6
PWRGOOD
7
CS-
8
CS+
9
PGNDH 10
DH 11
PGNDL 12
24 GATE2
23 LDOV
22 VID0
21 VID1
20 VID2
19 VID3
18 VID4
17 VOSENSE
16 EN
15
BSTH
14 BSTL
13 DL
(24 Pin SOIC)
Note:
(1) All logic level inputs and outputs are open
collector TTL compatible.
© 1999 SEMTECH CORP.
3
652 MITCHELL ROAD NEWBURY PARK CA 91320
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