Datasheet
Table Of Contents

1
2
3
4
5
6
7
8
20
19
18
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16
15
14
13
ILIM
SS/TRK
EN
AVIN
PVIN
PVIN
PVIN
PGND
SW
SW
SW
SW
AGND
FB
COMP
PGOOD
EP
Top View
PGND
PGND
12
11 SW
9
10
SW
LM21215
SNVS625E –FEBRUARY 2011–REVISED MARCH 2013
www.ti.com
DESCRIPTION (CONTINUED)
The LM21215 features internal over voltage protection (OVP) and resistor-programmable over-current protection
(OCP) for increased system reliability. A precision enable pin and integrated UVLO allow turn-on of the device to
be tightly controlled and sequenced. Startup inrush currents are limited by both an internally fixed and externally
adjustable soft-start circuit. Fault detection and supply sequencing are possible with the integrated power good
circuit.
The LM21215 is designed to work well in multi-rail power supply architectures. The output voltage of the device
can be configured to track an external voltage rail using the SS/TRK pin. If the output is pre-biased at startup, it
will not sink current, allowing the output to smoothly rise past the pre-biased voltage. The regulator is offered in a
20-pin HTSSOP package with an exposed pad that can be soldered to the PCB, eliminating the need for bulky
heatsinks.
Connection Diagram
Figure 1. Top View
HTSSOP-20 Package
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Product Folder Links: LM21215