Datasheet

EN
LM5001
V
PWR
STANDBY
R2
OFF
OFF
STANDBY
R1
1.26V
0.45V
EN
LM5001
Disable PWM Controller
R1
Disable VCC Regulator
VIN
1.26V
0.45V
6 PA
V
PWR
R2
LM5001
SNVS484E –JANUARY 2007–REVISED MARCH 2013 www.ti.com
Figure 18. Basic EN (UVLO) Configuration
Remote configuration of the controller’s operational modes can be accomplished with open drain device(s)
connected to the EN pin as shown in Figure 19. A MOSFET or an NPN transistor connected to the EN pin can
force the regulator into the low power ‘off’ state. Adding a PN diode in the drain (or collector) provides the offset
to achieve the standby state. The advantage of standby is that the VCC LDO is not disabled and external
circuitry powered by VCC remains functional.
Figure 19. Remote Standby and Disable Control
12 Submit Documentation Feedback Copyright © 2007–2013, Texas Instruments Incorporated
Product Folder Links: LM5001