Specifications
| Type | Description |
|---|---|
| Part Number | LM2733 |
| Manufacturer | Texas Instruments |
| Product Type | LDO Regulator |
| Category | Power Management |
| Package / Case | 5-pin SOT-23 / DBV, 2.90 mm x 1.60 mm nominal body |
| Component Type | Power_IC |
| Converter topology | Boost converter; current-mode switching regulator |
| Internal switch voltage rating | 40 V; internal DMOS FET switch |
| Switch current capability | up to 1 A; internal switch |
| Switching frequency option X | 1.6 MHz; X option |
| Switching frequency option Y | 0.6 MHz; Y option |
| Input supply voltage range | 2.7 to 14 V; recommended operating condition |
| Shutdown current | < 1 uA; low shutdown current feature |
| Input supply voltage absolute maximum | -0.4 to 14.5 V; VIN |
| FB pin voltage absolute maximum | -0.4 to 6 V |
| SW pin voltage absolute maximum | -0.4 to 40 V |
| SHDN pin voltage absolute maximum | -0.4 to VIN + 0.3 V |
| Power dissipation | Internally limited |
| Lead temperature | 300 °C; soldering, 5 sec |
| Storage temperature | -65 to 150 °C |
| ESD rating HBM | ±2000 V; ANSI/ESDA/JEDEC JS-001, all pins |
| ESD rating machine model | ±200 V |
| SHDN pin voltage operating range | 0 to VIN V; recommended operating condition |
| Junction temperature operating range | -40 to 125 °C |
| Junction-to-ambient thermal resistance | 210 °C/W; DBV SOT-23, 5 pins |
| Junction-to-case top thermal resistance | 122 °C/W; DBV SOT-23, 5 pins |
| Junction-to-board thermal resistance | 38.4 °C/W; DBV SOT-23, 5 pins |
| Junction-to-top characterization parameter | 12.8 °C/W; DBV SOT-23, 5 pins |
| Junction-to-board characterization parameter | 37.5 °C/W; DBV SOT-23, 5 pins |
| Junction-to-case bottom thermal resistance | n/a; DBV SOT-23, 5 pins |
| Switch current limit | 1 A min, 1.5 A typ; duty cycle <= 50%, VIN = 5 V, VSHDN = 5 V, IL = 0 A, TJ = 25 °C unless otherwise specified |
| Switch ON resistance | 500 mOhm typ, 650 mOhm max; ISW = 100 mA, VIN = 5 V, VSHDN = 5 V, IL = 0 A, TJ = 25 °C unless otherwise specified |
| Shutdown threshold ON | 1.5 V min; device ON, -40 °C <= TJ <= +125 °C |
| Shutdown threshold OFF | 0.50 V max; device OFF, -40 °C <= TJ <= +125 °C |
| Shutdown pin bias current, VSHDN = 0 V | 0 uA typ |
| Shutdown pin bias current, VSHDN = 5 V at TJ = 25 °C | 0 uA typ |
| Shutdown pin bias current, VSHDN = 5 V over temperature | 2 uA max; -40 °C <= TJ <= +125 °C |
| Feedback reference voltage, typical | 1.230 V typ; VIN = 3 V, TJ = 25 °C |
| Feedback reference voltage, over temperature | 1.205 V min, 1.255 V max; VIN = 3 V, -40 °C <= TJ <= +125 °C |
| Feedback pin bias current | 60 nA typ; VFB = 1.23 V |
| Quiescent current, X option switching typical | 2.1 mA typ; VSHDN = 5 V, switching X, TJ = 25 °C |
| Quiescent current, X option switching maximum | 3 mA max; VSHDN = 5 V, switching X, -40 °C <= TJ <= +125 °C |
| Quiescent current, Y option switching typical | 1.1 mA typ; VSHDN = 5 V, switching Y, TJ = 25 °C |
| Quiescent current, Y option switching maximum | 2 mA max; VSHDN = 5 V, switching Y, -40 °C <= TJ <= +125 °C |
| Quiescent current, not switching typical | 400 uA typ; VSHDN = 5 V, not switching, TJ = 25 °C |
| Quiescent current, not switching maximum | 500 uA max; VSHDN = 5 V, not switching, -40 °C <= TJ <= +125 °C |
| Shutdown quiescent current | 0.024 uA typ, 1 uA max; VSHDN = 0 V |
| FB voltage line regulation | 0.02 %/V typ; 2.7 V <= VIN <= 14 V |
| Switching frequency, X option typical | 1.6 MHz typ; TJ = 25 °C |
| Switching frequency, X option range | 1.15 MHz min, 1.85 MHz max; -40 °C <= TJ <= +125 °C |
| Switching frequency, Y option typical | 0.60 MHz typ; TJ = 25 °C |
| Switching frequency, Y option range | 0.40 MHz min, 0.8 MHz max; -40 °C <= TJ <= +125 °C |
| Maximum duty cycle, X option typical | 93% typ; TJ = 25 °C |
| Maximum duty cycle, X option minimum | 87% min; -40 °C <= TJ <= +125 °C |
| Maximum duty cycle, Y option typical | 96% typ; TJ = 25 °C |
| Maximum duty cycle, Y option minimum | 93% min; -40 °C <= TJ <= +125 °C |
| Switch leakage current | 1 uA max; not switching, VSW = 5 V |
| Pin 1 function | SW, drain of internal FET switch |
| Pin 2 function | GND, analog and power ground |
| Pin 3 function | FB, feedback point for external resistive divider |
| Pin 4 function | SHDN, shutdown control input; connect to VIN if shutdown feature is not used |
| Pin 5 function | VIN, analog and power input |
| Datasheet Status | request_only |
Product Overview
The recommended input supply voltage range is 2.7 to 14 V, with an absolute maximum VIN range of -0.4 to 14.5 V. The feedback reference is 1.230 V typical at VIN = 3 V and TJ = 25 °C, with a 1.205 V to 1.255 V range over -40 °C to +125 °C. Shutdown control supports an ON threshold of 1.5 V minimum and an OFF threshold of 0.50 V maximum.
The package is a 5-pin SOT-23 / DBV with a 2.90 mm x 1.60 mm nominal body. Pin functions include SW, GND, FB, SHDN, and VIN. Thermal data for the DBV package includes 210 °C/W junction-to-ambient resistance and 122 °C/W junction-to-case top resistance. Applications align with compact boost-regulated power rails requiring shutdown control, external feedback divider setting, and SOT-23 assembly.
Key Features
- Current-mode boost converter regulator topology
- Internal 40 V DMOS FET switch
- Internal switch current capability up to 1 A
- X option switching frequency is 1.6 MHz typical
- Y option switching frequency is 0.60 MHz typical
- Recommended input supply range is 2.7 to 14 V
- Shutdown quiescent current is 0.024 uA typical
- Feedback reference is 1.230 V typical
- Switch ON resistance is 500 mOhm typical
- Maximum duty cycle reaches 96% typical on Y option
- 5-pin SOT-23 / DBV package
- Junction operating range is -40 to 125 °C
Typical Applications
- Boost-regulated power rails
- Step-up voltage conversion
- Compact SOT-23 power modules
- Shutdown-controlled power supplies
- External divider feedback regulation
- 2.7 to 14 V input systems
- 40 V switch-node boost designs
Procurement Notes
When requesting a quote for LM2733, buyers should confirm the manufacturer, package or case, required quantity, target date code, compliance documents, packing method, destination country and expected delivery schedule.
If alternatives are acceptable, buyers should share the approved vendor list, required electrical or optical limits, package constraints and qualification requirements. Any alternative part should be reviewed by the buyer's engineering team before production use.
For power IC and power device sourcing, voltage rating, current rating, power dissipation, package thermal performance, protection features, qualification grade and application conditions should be reviewed before approval.
FAQ
What type of regulator is the LM2733?
The LM2733 is a Texas Instruments boost converter regulator. The extracted datasheet facts identify it as a current-mode switching regulator with an internal DMOS FET switch rated at 40 V.
What input voltage range does the LM2733 support?
The recommended input supply voltage range is 2.7 to 14 V. The VIN absolute maximum rating is listed separately as -0.4 to 14.5 V.
What are the LM2733 switching frequency options?
The LM2733 has two frequency options. The X option is 1.6 MHz typical, with a 1.15 MHz to 1.85 MHz range over temperature. The Y option is 0.60 MHz typical, with a 0.40 MHz to 0.8 MHz range.
What package and pin functions are specified for LM2733?
The package is a 5-pin SOT-23 / DBV with a 2.90 mm x 1.60 mm nominal body. The pins are SW, GND, FB, SHDN, and VIN.
Technical Review & Sourcing Note
Prepared by LDeepAI Component Sourcing Team. Reviewed for RFQ, documentation and alternative sourcing use. Last updated: June 30, 2026.
This page is based on manufacturer datasheet information and LDeepAI sourcing review. Specifications should be verified against the official manufacturer datasheet before final procurement or design approval. Final electrical, optical and reliability approval should be confirmed by the buyer's engineering team.