PROGRAMMABLE SYNCHRONOUS DC/DC
CONVERTER, DUAL LOW DROPOUT
REGULATOR CONTROLLER
August 25, 1998
SC1182/3
PIN DESCRIPTION
Pin
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
Pin Name
AGND
GATE1
LDOS1
LDOS2
VCC
OVP
(1)
PWRGOOD
CS-
CS+
PGNDH
DH
PGNDL
DL
BSTL
BSTH
(1)
EN
VOSENSE
(1)
VID4
(1)
VID3
(1)
VID2
(1)
VID1
(1)
VID0
LDOV
GATE2
Pin Function
Small Signal Analog and Digital Ground
Gate Drive Output LDO1
Sense Input for LDO1
Sense Input for LDO2
Input Voltage
High Signal out if V
O
>setpoint +20%
Open collector logic output, high if V
O
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
GATE1
LDOS1
LDOS2
VCC
OVP
PWRGOOD
CS-
CS+
PGNDH
DH
PGNDL
1
2
3
4
5
6
7
8
9
10
11
12
24
23
22
21
20
19
18
17
16
15
14
13
GATE2
LDOV
VID0
VID1
VID2
VID3
VID4
VOSENSE
EN
BSTH
BSTL
DL
(24 Pin SOIC)
Note:
(1) All logic level inputs and outputs are open
collector TTL compatible.
3
© 1998 SEMTECH CORP.
652 MITCHELL ROAD NEWBURY PARK CA 91320
SEMTECH [ SEMTECH CORPORATION ]
