SC1173 Semtech Corporation, SC1173 Datasheet - Page 3

• Manufacturer Part Number: SC1173
• Description: PROGRAMMABLE SYNCHRONOUS DC/DC CONVERTER WITH LOW DROPOUT REGULATOR CONTROLLER
• Manufacturer: Semtech Corporation

October 25, 1999
PIN DESCRIPTION
© 1999 SEMTECH CORP.
Pin
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
1
2
3
4
5
6
7
8
9
Pin Name
AGND
NC
NC
LDOS
VCC
OVP
PWRGOOD
CS-
CS+
PGNDH
DH
PGNDL
DL
BSTL
BSTH
EN
VOSENSE
VID4
VID3
VID2
VID1
VID0
LDOV
GATE
(1)
(1)
(1)
(1)
(1)
(1)
(1)
Pin Function
Small Signal Analog and Digital Ground
No connection
No Connection
Sense Input for LDO
Input Voltage
High Signal out if V
Open collector logic output, high if V
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 LDO
O
PROGRAMMABLE SYNCHRONOUS DC/DC
CONVERTER WITH LOW DROPOUT
REGULATOR CONTROLLER
>setpoint +20%
O
652 MITCHELL ROAD NEWBURY PARK CA 91320
Note:
(1) All logic level inputs and outputs are open
collector TTL compatible.
PWRGOOD
PGNDH
PGNDL
AGND
LDOS
VCC
OVP
CS+
CS-
NC
NC
DH
(24 Pin SOIC)
Top View
1
2
3
4
5
6
7
8
9
10
11
12
24
23
22
21
20
19
18
17
16
15
14
13
SC1172/3
GATE
LDOV
VID0
VID1
VID2
VID3
VID4
VOSENSE
EN
BSTH
BSTL
DL
3