Product Summary

The LM340S-12 is a monolithic 3-terminal positive voltage regulator. The LM340S-12 employs internal current-limiting, thermal shutdown and safe-area compensation, making them essentially indestructible. If adequate heat sinking is provided, they can deliver over 1.0A output current. The LM340S-12 is intended as fixed voltage regulators in a wide range of applications including local (on-card) regulation for elimination of noise and distribution problems associated with single-point regulation. In addition to use as fixed voltage regulators, these devices can be used with external components to obtain adjustable output voltages and currents.

Parametrics

LM340S-12 absolute maximum ratings: (1)DC Input Voltage: 35V; (2)Internal Power Dissipation: Internally Limited; (3)Maximum Junction Temperature: 150℃; (4)Storage Temperature Range: -65℃ to +150℃; (5)Lead Temperature (Soldering, 10 sec.): 300℃.

Features

LM340S-12 features: (1)Complete specifications at 1A load; (2)Output voltage tolerances of ±2% at Tj = 25℃ and ±4%; (3)over the temperature range (LM340A); (4)Line regulatioof 0.01% of VOUT/V of ΔVIN at 1A load (LM340A); (5)Load regulatioof 0.3% of VOUT/A (LM340A); (6)Internal thermal overload protection; (7)Internal short-circuit current limit; (8)Output transistor safe area protection; (9)P+ Product Enhancement tested.

Diagrams

LM340S-12 pin connection

Image Part No Mfg Description Data Sheet Download Pricing
(USD)		 Quantity
LM340S-12
LM340S-12
National Semiconductor (TI)
Linear Regulators - Standard
Data Sheet
0-675: $0.54
675-1035: $0.50
1035-2520: $0.46
2520-5040: $0.45
LM340S-12/NOPB
LM340S-12/NOPB
National Semiconductor (TI)
Linear Regulators - Standard 3-TERMINAL POS REG
Data Sheet
0-1: $1.00
1-25: $0.79
25-100: $0.69
100-250: $0.61