DATA SHEET
LMx37 3-Terminal Adjustable Regulators
1 Features
- Output Voltage Range Adjustable From –1.2 V to –37 V
- Output Current Capability of 1.5 A Max
- Input Regulation Typically 0.01% Per Input-Voltage Change
- Output Regulation Typically 0.3%
- Peak Output Current Constant Over Temperature Range of Regulator
- Ripple Rejection Typically 77 dB
- Direct Replacement for Industry-Standard LM237 and LM337
2 Applications
- Applications Requiring Negative Output Voltage or Precision Current Regulation
- Consumer Electronics
- End Equipment
- Portable Applications
3 Description
The LM237 and LM337 are adjustable 3-terminal negative-voltage regulators capable of supplying in excess of –1.5 A over an output voltage range of –1.2 V to –37 V. They require only two external resistors to set the output voltage and one output capacitor for frequency compensation.
Device Information(1)
| PART NUMBER | PACKAGE | BODY SIZE (NOM) |
|---|---|---|
| LMx37 | TO-220 (4) | 10.16 mm x 8.82 mm |
| TO-263 (4) | 10.16 mm x 9.02 mm | |
| TO-252 (4) | 6.6 mm x 6.10 mm |
- For all available packages, see the orderable addendum at the end of the data sheet.
4 Simplified Schematic
5 Revision History
Changes from K Revision (November 2007) to L Revision
- Added Applications, Device Information table, Pin Functions table, ESD Ratings table, Thermal Information table, Typical Characteristics, 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
- Deleted Ordering Information table.Go
6 Pin Configuration and Functions
Pin Functions
| PIN | TYPE | DESCRIPTION | |
|---|---|---|---|
| NAME | NO. | ||
| ADJUSTMENT | 1 | I | Adjustment pin for the output voltage. Connect two external resistors to adjust the output voltage. |
| INPUT | 2 | I | Input voltage. The input voltage and current will be designated VI and II respectively. |
| OUTPUT | 3 | O | Output voltage. The output voltage and current will be designated VO and IO respectively. |