LM2775-Q1 Switched Capacitor 5-V Boost Converter
1 Features
- Qualified for automotive applications
- AEC-Q100 qualified with the following results
- Device temperature grade 1: –40°C to +125°C ambient operating temperature range
- 2.7-V to 5.5-V input range
- Fixed 5-V output
- 200-mA output current
- Inductor-less solution: only requires 3 small ceramic capacitors
- Shutdown disconnects load from VIN
- Current limit and thermal protection
- 2-MHz switching frequency
- PFM operation during light load currents (PFM pin tied high)
3 Description
The LM2775-Q1 is a regulated switched-capacitor doubler that produces a low-noise output voltage. The LM2775-Q1 can supply up to 200 mA of output current over a 3.1-V to 5.5-V input range, as well as up to 125 mA of output current when the input voltage is as low as 2.7 V. The LM2775-Q1 provides a cost-optimized 5V, 200mA supply for powering CAN transceivers and other loads, boosting from a regulated 3.3-V system rail. It can be used as a post-boost in automotive systems that do not use a wide input voltage pre-boost or cold crank. At low output currents, the LM2775-Q1 can reduce its quiescent current by operating in a pulse frequency modulation (PFM) mode. PFM mode can be enabled or disabled by driving the PFM pin to high or low. Additionally, when the device is in shutdown, the user can chose to have the output voltage pulled to GND or left in a high impedance state by setting the OUTDIS pin high or low.
The LM2775-Q1 has been placed in TI's 8-pin WSON, a package with excellent thermal properties that keeps the part from overheating under almost all rated operating conditions.
| PART NUMBER | PACKAGE | BODY SIZE (NOM) |
|---|---|---|
| LM2775-Q1 | WSON (8) | 2.00 mm × 2.00 mm |
Typical Application
Circuit
Load Regulation4 Revision History
Changes from Revision B (November 2019) to Revision C (May 2021)
- Updated the numbering format for tables, figures and cross-references throughout the document. Go
- Corrected applicationGo
Changes from Revision A (September 2018) to Revision B (November 2019)
- Changed Load Regulation graphGo
- Changed Abs Max Ratings TJ-MAX 'Max' temp from 125 to 150Go
- Added IOUT spec to Section 6.3 tableGo
- Changed maximum ambient temp range from 85 to 125°C in the 'Condition statement of Section 6.5 tableGo
- Added Thermal shutdown spec to Electrical Characteristics table Go
- Changed TA to TJ= 25°C in Conditions statement of Section 6.7 sectionGo
- Updated Typical Characteristics graphs Go
- Updated Application Curve Figure 8-4 Go
Changes from Revision * (June 2018) to Revision A (September 2018)
- Deleted Advance Information Banner. Data sheet is Production Data. Go
