LM2936 Ultra-Low Quiescent Current LDO Voltage Regulator
1 Features
- LM2936 Operating VIN range of 5.5 V to 40 V
- LM2936HV Operating VIN range of 5.5 V to 60 V
- Ultra Low Quiescent Current (IQ ≤ 15 μA for IOUT = 100 μA)
- Fixed 3-V, 3.3-V or 5-V with 50-mA Output
- ±2% Initial Output Tolerance
- ±3% Output Tolerance Over Line, Load, and Temperature
- Dropout Voltage Typically 200 mV at IOUT = 50 mA
- –24-V Input Voltage Protection
- –50-V Input Transient Protection
- Internal Short Circuit Current Limit
- Internal Thermal Shutdown Protection
- Shutdown Pin Available with LM2936BM Package
2 Applications
- Automotive
- Industrial Controls
- Point of Load
3 Description
The LM2936 ultra-low quiescent current regulator features low dropout voltage and low current in the standby mode. With less than 15-μA quiescent current at a 100-μA load, the LM2936 is ideally suited for automotive and other battery operated systems. The LM2936 retains all of the features that are common to low dropout regulators including a low dropout PNP pass device, short circuit protection, reverse battery protection, and thermal shutdown. The LM2936 has a 40-V maximum operating voltage limit, a −40°C to 125°C operating temperature range, and ±3% output voltage tolerance over the entire output current, input voltage, and temperature range. The LM2936 is available in a TO-92 through-hole package, as well as SOIC-8, VSSOP, SOT–223, and TO-252 surface mount packages.
Device Information(1)
| PART NUMBER | PACKAGE | BODY SIZE (NOM) |
|---|---|---|
| LM2936 | SOIC (8) | 4.90 mm x 3.91 mm |
| TO-252 (3) | 6.10 mm x 6.58 mm | |
| VSSOP (8) | 3.00 mm x 3.00 mm | |
| SOT-223 (4) | 6.50 mm x 3.50 mm | |
| TO-92 (3) | 4.30 mm x 4.30 mm |
- For all available packages, see the orderable addendum at the end of the datasheet.
Simplified Schematic
** Required for stability. See Electrical Characteristics for 3-V LM2936 for required values. Must be rated over intended operating temperature range. Effective series resistance (ESR) is critical, see Typical Characteristics. Locate capacitor as close as possible to the regulator output and ground pins. Capacitance may be increased without bound.
4 Revision History
Changes from N Revision (March 2013) to O Revision
- Added Pin Configuration and Functions section, ESD Rating table, Feature Description section, Device Functional Modes, Application and Implementation section, Power Supply Recommendations section, Layout section, Device and Documentation Support section, and Mechanical, Packaging, and Orderable Information section Go
Changes from M Revision (March 2013) to N Revision
- Changed layout of National Data Sheet to TI formatGo
5 Pin Configuration and Functions
Pin Functions
| PIN | I/O | DESCRIPTION | ||||||
|---|---|---|---|---|---|---|---|---|
| NAME | D (LM2936BM) |
D (LM2936M) |
NDP | DGK | DCY | LP | ||
| IN | 8 | 8 | 1 | 8 | 1 | 3 | I | Unregulated input voltage. |
| GND | 2, 3, 6, 7 | 2, 3, 6, 7 | 4 | 7 | 2, 4 | 2 | — | Ground. |
| OUT | 1 | 1 | 3 | 1 | 3 | 1 | O | Regulated output voltage. Requires a minimum output capacitance, with specific ESR, on this pin to maintain stability. |
| SD | 5 | — | — | — | — | — | I | Shutdown. LM2936BM only. Pull this pin HIGH (> 2 V) to turn the output OFF. If this pin is left open, pull ed low (< 0.6 V), or connected to GND, the output will be ON by default. Avoid having any voltage between 0.6 V and 2 V on this pin as the output status may not be predicable across the operating range. |
| NC | 4 | 4, 5 | — | 2, 3, 4, 5, 6 | — | — | — | No internal connection, Connect to GND, or leave open. |
