DATA SHEET
LM2765 Switched-Capacitor Voltage Converter
1 Features
- Doubles Input Supply Voltage
- SOT-23 6-Pin Package
- 20-Ω Typical Output Impedance
- 90% Typical Conversion Efficiency at 20 mA
- 0.1-µA Typical Shutdown Current
2 Applications
- Cellular Phones
- Pagers
- PDAs
- Operational Amplifier Power Supplies
- Interface Power Supplies
- Handheld Instruments
3 Description
The LM2765 CMOS charge-pump voltage converter operates as a voltage doubler for an input voltage in the range of 1.8 V to 5.5 V. Two low-cost capacitors and a diode are used in this circuit to provide up to 20 mA of output current.
The LM2765 operates at 50-kHz switching frequency to reduce output resistance and voltage ripple. With an operating current of only 130 µA (operating efficiency greater than 90% with most loads) and 0.1-µA typical shutdown current, the LM2765 provides ideal performance for battery powered systems. The device is manufactured in a 6-pin SOT-23 package.
Device Information(1)
| PART NUMBER | PACKAGE | BODY SIZE (NOM) |
|---|---|---|
| LM2765 | SOT-23 (6) | 2.90 mm × 1.60 mm |
- For all available packages, see the orderable addendum at the end of the data sheet.
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Voltage Doubler
4 Revision History
Changes from C Revision (May 2013) to D Revision
- Added Pin Configuration and Functions section, ESD Rating table, Feature Description , Device Functional Modes, Application and Implementation, Power Supply Recommendations, Layout, Device and Documentation Support, and Mechanical, Packaging, and Orderable Information sections; change pin name "VOUT" to "OUT"Go
- Added top nav icon for TI design Go
- Changed RθJA value from 210°C/W to 185.2°C/W; add additional thermal valuesGo
Changes from B Revision (May 2013) to C Revision
- Changed layout of National Semiconductor data sheet to TI formatGo
5 Pin Configuration and Functions
DBV Package
6-Pin SOT-23
Top View
Pin Functions
| PIN | TYPE | DESCRIPTION | |
|---|---|---|---|
| NO. | NAME | ||
| 1 | V+ | Power | Power supply positive voltage input |
| 2 | GND | Ground | Power supply ground input |
| 3 | CAP− | Power | Connect this pin to the negative terminal of the charge-pump capacitor. |
| 4 | SD | Input | Shutdown control pin; tie this pin to ground in normal operation. |
| 5 | OUT | Power | Positive voltage output |
| 6 | CAP+ | Power | Connect this pin to the positive terminal of the charge-pump capacitor. |
