s-8460 Seiko Instruments Inc., s-8460 Datasheet - Page 3

• Manufacturer Part Number: s-8460
• Description: Step-up Or Down, Single-coil, Pwm Control Switching Regulator Controller
• Manufacturer: Seiko Instruments Inc.

Rev.2.1
Pin Configuration
STEP-UP OR DOWN, SINGLE-COIL, PWM CONTROL SWITCHING REGULATOR CONTROLLER
1
2
3
4
5
6
7
8
16-Pin TSSOP
_00
Top view
Figure 2
16
15
14
13
12
11
10
9
*1. No use except boosting this IC is allowed.
*2. The VSS pin and DVSS pin are internally short-circuited.
*3. The NC pin is electrically open. Connection of this pin to VIN or VSS is
Pin No.
allowed.
10
11
12
13
14
15
16
Seiko Instruments Inc.
1
2
3
4
5
6
7
8
9
ON/OFF
Symbol
CPRO
DVSS
EXT3
EXT2
EXT1
CSS
VSS
BST
VIN
NC
NC
VL
FB
LX
T
IC power supply pin
Power supply pin for boost
Shutdown pin
“H” : Normal operation (step-up and down)
“L” : Halt (no step-up and down)
GND pin
Capacitor connection pin for soft-start time
Capacitor connection pin for setting protection time
Test pin, should be connected to GND
No connection
FB pin
No connection
External transistor driving pin 3
Digital GND pin
External transistor driving pin 2
Connection pin for coil
External transistor driving pin 1
Boost capacitor connection pin for SW1 driving
Table 1
*2
*3
*3
*2
Pin Description
*1
S-8460
3