The LP2954 is a 5-V micropower LDO with very low quiescent current (90 μA typical at 1-mA load) and very low dropout voltage (typically 60 mV at light loads and 470 mV at 250-mA load current).
The quiescent current increases only slightly at dropout (120 μA typical), which prolongs battery life.
The LP2954 with a fixed 5-V output is available in three-pin TO-220 and DDPAK/TO-263 packages. The adjustable LP2954 is provided in an 8-pin, small-outline SOIC package. The adjustable version also provides a resistor network which can be pin strapped to set the output to any voltage from to 1.23 V to 29 V.
Reverse battery protection is provided for the IN pin.
The tight line and load regulation (0.04% typical), as well as very low output temperature coefficient make the LP2954 well suited for use as a low-power voltage reference.
Output accuracy is ensured at both room temperature and over the entire operating temperature range.
PART NUMBER | PACKAGE | BODY SIZE (NOM) |
---|---|---|
LP2954 | SOIC (8) | 4.90 mm × 3.91 mm |
DDPAK/TO-263 (3) | 10.18 mm × 8.41 mm | |
TO-220 (3) | 14.986 mm × 10.16 mm |
Changes from D Revision (March 2013) to E Revision
Changes from C Revision (March 2013) to D Revision
PIN | I/O | DESCRIPTION | |||
---|---|---|---|---|---|
NAME | NDE | KTT | D | ||
ERROR | — | — | 5 | O | Error output |
FEEDBACK | — | — | 7 | I | Voltage feedback input |
IN | 1 | 1 | 8 | I | Unregulated input voltage |
GND | 2 | 2 | 4 | — | Ground |
OUT | 3 | 3 | 1 | O | Regulated output voltage. This pin requires an output capacitor to maintain stability. See Detailed Design Procedure for output capacitor details |
SENSE | — | — | 2 | I | Output voltage sense |
SHUTDOWN | — | — | 3 | I | Disable device |
5V TAP | — | — | 6 | O | Internal resistor divider |