RoHS Compliance Information	Size in Kbytes	Date
LM140L/LM340L Series 3-Terminal Positive Regulators	618 Kbytes	19-Jul-05	Download
LM140LQML Series 3-Terminal Positive Regulators	595 Kbytes	10-Mar-06	Download

Part Number

Package

Factory Lead Time

Models

Samples & Electronic Orders

Budgetary Pricing

Std Pack Size

Package Marking Format

Type

Pins

Spec.

MSL Rating

Peak Reflow

RoHS Report

CAD Symbols

Weeks

Qty

Qty

$US each

LM140LAH-12

TO-39

3

NOPB STD

1 1

NA NA

RoHS

N/A

Full production

N/A

1K+

$5.21

box of 500

NSZXYTTE# LM140LAH-12

6 weeks

1000

LM140LAH-15

TO-39

3

NOPB STD

1 1

NA NA

RoHS

N/A

Full production

N/A

1K+

$5.21

box of 500

NSZXYTTE# LM140LAH-15

6 weeks

1000

LM140LAH-5.0

TO-39

3

NOPB STD

1 1

NA NA

RoHS

N/A

Full production

N/A

1K+

$5.21

box of 500

NSZXYTTE# LM140LAH-5.0

6 weeks

1000

LM140LAH-12/883

TO-39

3

STD

1

NA

RoHS

N/A

Full production

N/A

50+

$14.30

tray of 20

NS ZSSXXYYA LM140LAH-12/883 Q

8 weeks

500

LM140LAH-15/883

TO-39

3

STD

1

NA

RoHS

N/A

Full production

N/A

50+

$14.30

tray of 20

NS ZSSXXYYA LM140LAH-15/883 Q

8 weeks

500

LM140LAH5.0/883

TO-39

3

STD

1

NA

RoHS

N/A

Full production

N/A

50+

$14.30

tray of 20

NS ZSSXXYYA LM140LAH5.0/883 Q

8 weeks

500

Obsolete Versions

General Description

The LM140L series of three terminal positive regulators is available with several fixed output voltages making them useful in a wide range of applications. The LM140LA is an improved version of the LM78LXX series with a tighter output voltage tolerance (specified over the full military temperature range), higher ripple rejection, better regulation and lower quiescent current. The LM140LA regulators have ±2% V_OUT specification, 0.04%/V line regulation, and 0.01%/mA load regulation. When used as a zener diode/resistor combination replacement, the LM140LA usually results in an effective output impedance improvement of two orders of magnitude, and lower quiescent current. These regulators can provide local on card regulation, eliminating the distribution problems associated with single point regulation. The voltages available allow the LM140LA to be used in logic systems, instrumentation, Hi-Fi, and other solid state electronic equipment. Although designed primarily as fixed voltage regulators, these devices can be used with external components to obtain adjustable voltages and currents.

The LM140LA/LM340LA are available in the low profile metal three lead TO-39 (H) and the LM340LA are also available in the plastic TO-92 (Z). With adequate heat sinking the regulator can deliver 100 mA output current. Current limiting is included to limit the peak output current to a safe value. Safe area protection for the output transistor is provided to limit internal power dissipation. If internal power dissipation becomes too high for the heat sinking provided, the thermal shut-down circuit takes over, preventing the IC from overheating.

For applications requiring other voltages, see LM117L Data Sheet.