LM3100 View Datasheet(PDF) - Unspecified
Part Name
Description
View to exact match
LM3100 Datasheet PDF : 15 Pages
| |||
Pin Descriptions
Pin
1,9,10,12,19,20
2, 3
Name
N/C
SW
4, 5
VIN
6
BST
7
GND
8
SS
11
TST
13
FB
14
EN
15
RON
16
VCC
17, 18
DAP
PGND
EP
Description
No Connection
Switching Node
Input supply voltage
Connection for bootstrap capacitor
Analog Ground
Soft-start
Test mode enable pin
Feedback
Enable pin
On-time Control
Start-up regulator Output
Power Ground
Exposed Pad
Application Information
These pins must be left unconnected.
Internally connected to the buck switch source.
Connect to output inductor.
Supply pin to the device. Nominal input range is
4.5V to 36V.
Connect a 0.033µF capacitor from SW pin to this
pin. An internal diode charges the capacitor during
the high-side switch off-time.
Ground for all internal circuitry other than the
synchronous switches.
An internal 8µA current source charges an external
capacitor to provide the soft- start function.
Force the device into test mode. Must be connected
to ground for normal operation.
Internally connected to the regulation and
over-voltage comparators. The regulation setting is
0.8V at this pin. Connect to feedback divider.
Connect a voltage higher than 1.26V to enable the
regulator.
An external resistor from VIN to this pin sets the
high-side switch on-time.
Nominally regulated to 6V. Connect a capacitor of
not less than 680nF between VCC and GND for
stable operation.
Synchronous rectifier MOSFET source connection.
Tie to power ground plane.
Thermal connection pad, connect to GND.
3
www.national.com
|
|
Share Link: 