Specifications
| Type | Description |
|---|---|
| Part Number | LMR33630 |
| Manufacturer | Texas Instruments |
| Product Type | LDO Regulator |
| Category | Power Management |
| Component Type | Power_IC |
| Package Case | 8-pin HSOIC DDA 5.00 mm x 4.00 mm; 12-pin VQFN RNX 3.00 mm x 2.00 mm |
| Input Voltage Range | 3.8 to 36 V |
| Output Voltage Range | 1 to 24 V |
| Maximum Output Current | 3 A |
| Switching Frequency Options | 400 kHz, 1.4 MHz, 2.1 MHz |
| Control Method | Peak-current-mode control |
| Minimum On-Time | 68 ns |
| High-Side/Low-Side MOSFET On Resistance | 75 mOhm / 50 mOhm |
| Peak Efficiency | >95% |
| Operating Quiescent Current | 25 uA |
| Operating Junction Temperature Range | -40 to 125 °C |
| Absolute Maximum VIN to PGND | -0.3 to 38 V |
| Absolute Maximum EN to AGND | -0.3 to VIN + 0.3 V |
| Absolute Maximum FB to AGND | -0.3 to 5.5 V |
| Absolute Maximum PG to AGND | 0 to 22 V |
| Absolute Maximum AGND to PGND | -0.3 to 0.3 V |
| Absolute Maximum SW to PGND | -0.3 to VIN + 0.3 V |
| Absolute Maximum SW to PGND Transient Voltage | -3.5 to 38 V |
| Absolute Maximum BOOT to SW | -0.3 to 5.5 V |
| Absolute Maximum VCC to AGND | -0.3 to 5.5 V |
| Absolute Maximum Junction Temperature | -40 to 150 °C |
| Storage Temperature | -55 to 150 °C |
| ESD Rating HBM | ±2500 V |
| ESD Rating CDM | ±750 V |
| Recommended EN Input Voltage | 0 to VIN V |
| Recommended PG Voltage | 0 to 18 V |
| Package Option DDA | 8-pin HSOIC, 5 x 4 mm |
| Package Option RNX | 12-pin VQFN, 3 x 2 x 0.85 mm |
| LMR33630ADDA Frequency | 400 kHz |
| LMR33630BDDA Frequency | 1400 kHz |
| LMR33630CDDA Frequency | 2100 kHz |
| LMR33630ARNX Frequency | 400 kHz |
| LMR33630BRNX Frequency | 1400 kHz |
| LMR33630CRNX Frequency | 2100 kHz |
| VCC LDO Output | 5 V nominal |
| BOOT Capacitor | 100 nF |
| Protection Features | Thermal shutdown, input undervoltage lockout, cycle-by-cycle current limit, hiccup short-circuit protection |
| Datasheet Status | request_only |
Product Overview
The LMR33630 is a Texas Instruments synchronous step-down voltage converter in the Power_Management category. It is designed for regulated DC output conversion from a recommended VIN-to-PGND operating range of 3.8 to 36 V, with adjustable output voltage from 1 to 24 V and recommended output current up to 3 A.
The device uses peak-current-mode control and integrates power MOSFETs with 75 mOhm high-side and 50 mOhm low-side on-resistance. Frequency variants support 400 kHz, 1.4 MHz, or 2.1 MHz operation, with a specified minimum on-time of 68 ns and peak efficiency greater than 95%.
Package options include the DDA 8-pin HSOIC at 5 x 4 mm and the RNX 12-pin VQFN at 3 x 2 x 0.85 mm. The VCC LDO provides a nominal 5 V internal supply and requires a 1-uF capacitor to GND, while the BOOT pin uses a 100 nF capacitor to SW. Protection functions include thermal shutdown, input undervoltage lockout, cycle-by-cycle current limit, and hiccup short-circuit protection.
Key Features
- 3.8 to 36 V recommended input voltage range
- Adjustable 1 to 24 V output voltage range
- Up to 3 A recommended output current
- 400 kHz, 1.4 MHz, or 2.1 MHz options
- Peak-current-mode control architecture
- 68 ns specified minimum on-time
- 75 mOhm high-side and 50 mOhm low-side MOSFETs
- Greater than 95% peak efficiency
- 25 uA operating quiescent current
- -40 to 125 °C operating junction range
- 5 V nominal internal VCC LDO output
- Thermal shutdown and hiccup short-circuit protection
Typical Applications
- Step-down DC power rails
- 3 A regulated outputs
- Adjustable 1 to 24 V supplies
- 36 V input converter designs
- Compact VQFN power layouts
- HSOIC power assemblies
- Frequency-selected buck converter designs
Procurement Notes
When requesting a quote for LMR33630, 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 input range does the LMR33630 support?
The LMR33630 supports a recommended VIN-to-PGND operating input voltage range of 3.8 to 36 V. The absolute maximum VIN-to-PGND rating is -0.3 to 38 V.
What output current is specified for LMR33630?
The recommended operating output current for the LMR33630 is up to 3 A. The adjustable output voltage range is specified from 1 to 24 V.
Which packages are available for LMR33630?
Texas Instruments lists DDA and RNX package options. DDA is an 8-pin HSOIC package measuring 5 x 4 mm, while RNX is a 12-pin VQFN package measuring 3 x 2 x 0.85 mm.
What switching frequencies are offered for LMR33630 variants?
The LMR33630 family includes 400 kHz, 1400 kHz, and 2100 kHz frequency options. ADDA and ARNX are 400 kHz, BDDA and BRNX are 1400 kHz, and CDDA and CRNX are 2100 kHz.
What protection features are included in LMR33630?
The datasheet lists thermal shutdown, input undervoltage lockout, cycle-by-cycle current limit, and hiccup short-circuit protection as protection features for the LMR33630.
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.