Datasheet

R2
GND
Fast Turn
On Circuit
V
reference
1.23V
Over Current &
Thermal Protection
V
IN
V
EN
Bypass
V
OUT
R1
1.40V
ON
t
0.4V
OFF
d
LP3985
SNVS087AC –OCTOBER 2000–REVISED MAY 2013 www.ti.com
DESCRIPTION (CONTINUED)
The LP3985 is available in a 5-bump thin DSBGA and a 5-pin USON package. Performance is specified for
−40°C to +125°C temperature range and is available in 2.5V, 2.6V, 2.7V, 2.8V, 2.85V, 2.9V, 3.0V. 3.1V, 3.2V,
3.3V, 4.7V, 4.75V, 4.8V and 5.0V output voltages. For other output voltage options between 2.5V to 5.0V or for a
dual LP3985, please contact a Texas Instruments sales office.
Block Diagram
Figure 2.
PIN DESCRIPTIONS
Name * DSBGA USON Function
V
EN
A1 3 Enable Input Logic, Enable High
GND B2 2 Common Ground
V
OUT
C1 5 Output Voltage of the LDO
V
IN
C3 1 Input Voltage of the LDO
BYPASS A3 4 Optional Bypass Capacitor for Noise Reduction
Connection Diagram
Figure 3. Top View USON 5-Pin Package Figure 4. Top View 5-Bump DSBGA Package
Package Number MF05A Package Number TLA05
These devices have limited built-in ESD protection. The leads should be shorted together or the device placed in conductive foam
during storage or handling to prevent electrostatic damage to the MOS gates.
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Product Folder Links: LP3985