SC1408 Semtech Corporation, SC1408 Datasheet - Page 4

• Manufacturer Part Number: SC1408
• Description: LOW VOLTAGE/ BOOST DC-DC CONTROLLER
• Manufacturer: Semtech Corporation

August 22, 2000
BLOCK DIAGRAM
PIN CONFIGURATION
© 2000 SEMTECH CORP.
(SO-8/MSOP-8)
Top View
1.20V
REFERENCE
AGND
MAX ON TIME
ONE SHOT
TRIG
16uS
Q
ERROR
COMP
MIN OFF TIME
ONE SHOT
Q
2.3uS
+
-
TRIG
LOW VOLTAGE, BOOST DC-DC
CONTROLLER
REF
LOW
VOLTAGE
OSCILLATOR
PIN DESCRIPTION
S
R
Pin #
1
2
3
4
5
6
7
8
Q
MODE
DETECT
CURRENT
SENSE AMP
Pin Name
ISENSE
652 MITCHELL ROAD NEWBURY PARK CA 91320
+
-
SHDN
AGND
GATE
GND
BST
REF
FB
START
UP
COMP
FB
+
-
50mV
+
-
Pin Function
Gate drive output.
Supply voltage.
Voltage feedback.
Logic high shuts down the converter.
Reference output pin.
Small signal analog and digital ground.
Power ground.
Current sense pin.
2.5V
0.1V
INTERNAL BIAS
BIAS
SHDN
BST
GATE
GND
ISENSE
SC1408
4