The LM2731 switching regulators are current-mode boost converters operating at fixed frequencies of 1.6 MHz (X option) and 600 kHz (Y option).
The use of SOT-23 package, made possible by the minimal power loss of the internal 1.8-A switch, and use of small inductors and capacitors result in the highest power density of the industry. The 22-V internal switch makes these solutions perfect for boosting to voltages up to 20 V.
These parts have a logic-level shutdown pin that can reduce quiescent current and extend battery life.
Protection is provided through cycle-by-cycle current limiting and thermal shutdown. Internal compensation simplifies design and reduces component count.
PART NUMBER | PACKAGE | BODY SIZE (NOM) |
---|---|---|
LM2731 | SOT-23 (5) | 1.60 mm × 2.90 mm |
Changes from F Revision (November 2012) to G Revision
PIN | I/O | DESCRIPTION | |
---|---|---|---|
NAME | NO. | ||
FB | 3 | I | Feedback point that connects to external resistive divider. |
GND | 2 | PWR | Analog and power ground |
SHDN | 4 | I | Shutdown control input. Connect to VIN if the feature is not used. |
SW | 1 | O | Drain of the internal FET switch |
VIN | 5 | PWR | Analog and power input |