LP2950
Micropower Voltage
Regulators
The LP2950 and LP2951 are micropower voltage regulators that are
specifically designed to maintain proper regulation with an extremely
low input鈥搕o鈥搊utput voltage differential. These devices feature a very
low quiescent bias current of 75
碌A(chǔ)
and are capable of supplying
output currents in excess of 100 mA. Internal current and thermal
limiting protection is provided.
The LP2951 has three additional features. The first is the Error
Output that can be used to signal external circuitry of an out of
regulation condition, or as a microprocessor power鈥搊n reset. The
second feature allows the output voltage to be preset to 5.0 V, 3.3 V or
3.0 V output (depending on the version) or programmed from 1.25 V
to 29 V. It consists of a pinned out resistor divider along with direct
access to the Error Amplifier feedback input. The third feature is a
Shutdown input that allows a logic level signal to turn鈥搊ff or turn鈥搊n
the regulator output.
Due to the low input鈥搕o鈥搊utput voltage differential and bias current
specifications, these devices are ideally suited for battery powered
computer, consumer, and industrial equipment where an extension of
useful battery life is desirable. The LP2950 is available in the three
pin case 29 and DPAK packages, and the LP2951 is available in the
eight pin dual鈥搃n鈥搇ine, SO鈥? and Micro鈥? surface mount packages.
The 鈥楢鈥?suffix devices feature an initial output voltage tolerance
鹵
0.5%.
LP2950 and LP2951 Features:
http://onsemi.com
TO鈥?2
Z SUFFIX
CASE 29
1
2
3
Pin: 1. Output
2. Ground
3. Input
DPAK
DT SUFFIX
CASE 369A
1
3
PIN CONNECTIONS
Pin: 1. Input
2. Ground
3. Output
1
2
3
(Top View)
Heatsink surface (shown as terminal 4 in
case outline drawing) is connected to Pin 2.
SO鈥?
D SUFFIX
CASE 751
鈥?/div>
Low Quiescent Bias Current of 75
碌A(chǔ)
鈥?/div>
Low Input鈥搕o鈥揙utput Voltage Differential of 50 mV at 100
碌A(chǔ)
and
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
380 mV at 100 mA
5.0 V, 3.3 V or 3.0 V
鹵
0.5% Allows Use as a Regulator or Reference
Extremely Tight Line and Load Regulation
Requires Only a 1.0
碌F
Output Capacitor for Stability
Internal Current and Thermal Limiting
8
1
LP2951 Additional Features:
N SUFFIX
CASE 626
8
1
鈥?/div>
Error Output Signals an Out of Regulation Condition
鈥?/div>
Output Programmable from 1.25 V to 29 V
鈥?/div>
Logic Level Shutdown Input
(See Following Page for Device Information.)
Micro鈥?
DM SUFFIX
CASE 846A
8
1
PIN CONNECTIONS
Output 1
Sense 2
Shutdown 3
Gnd 4
(Top View)
8
7
6
5
Input
Feedback
VO Tap
Error Output
ORDERING INFORMATION
See detailed ordering and shipping information in the package
dimensions section on page 13 of this data sheet.
漏
Semiconductor Components Industries, LLC, 1999
1
October, 1999 鈥?Rev. 5
Publication Order Number:
LP2950/D
LP2951CD-3.3 產(chǎn)品屬性
98
集成電路 (IC)
PMIC - 穩(wěn)壓器 - 線性
-
正，固定式
3.3V
最高 30V
0.35V @ 100mA
1
100mA
-40°C ~ 125°C
表面貼裝
8-SOIC（0.154"，3.90mm 寬）
8-SOICN
管件
LP2951CD-3.3相關(guān)型號(hào)PDF文件下載
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