LP2985 Datasheet, PDF (2/21 Pages) National Semiconductor (TI) – Micropower 150 mA Low-Noise Ultra Low-Dropout Regulator Designed for Use with Very Low ESR Output Capacitors

Basic Application Circuit
10014002
*ON/OFF input must be actively terminated. Tie to V_IN if this function is not to be used.
**Minimum capacitance is shown to ensure stability (may be increased without limit). Ceramic capacitor required for output (see Application Hints).
***Reduces output noise (may be omitted if application is not noise critical). Use ceramic or film type with very low leakage current (see Application Hints).
Connection Diagrams
5-Lead Small Outline Package (M5)
micro SMD, 5 Bump Package (BPA05, TPA05 & BLA05)
10014003
Top View
See NS Package Number MF05A
For ordering information see Table 1
Pin Descrption
Name
V_IN
GND
ON/OFF
BYPASS
V_OUT
Pin Number
SOT-23
micro SMD
1
C3
2
A1
3
A3
4
B2
5
C1
10014046
Note: The actual physical placement of the package marking will vary from
part to part. Package marking contains date code and lot traceability
information, and will vary considerably. Package marking does not correlate
to device type.
Top View
See NS Package Number BPA05, TPA05 & BLA05
Function
Input Voltage
Common Ground (device substrate)
Logic high enable input
Bypass capacitor for low noise operation
Regulated output voltage
www.national.com
2