# LMR33630-Q1 (Component)
## Description
3.8-V to 36-V, 3-A synchronous step-down voltage converter
Buck Switching Regulator IC Positive Adjustable 1V 1 Output 3A 12-PowerVFQFN
The LMR33630-Q1 automotive-qualified regulator
is an easy-to-use, synchronous, step-down DC/DC
converter that delivers best-in-class efficiency for
rugged applications. The LMR33630-Q1 drives up
to 3 A of load current from an input of up to
36 V. The LMR33630-Q1 provides high light load
efficiency and output accuracy in a very small solution
size. Features such as a power-good flag and
precision enable provide both flexible and easy-touse solutions for a wide range of applications. The
LMR33630-Q1 automatically folds back frequency at
light load to improve efficiency. Integration eliminates
most external components and provides a pinout
designed for simple PCB layout. Protection features
include thermal shutdown, input undervoltage lockout,
cycle-by-cycle current limit, and hiccup short-circuit
protection. The LMR33630-Q1 is available in a 12-pin
3 mm × 2 mm next generation VQFN package with
wettable flanks
• AEC-Q100 qualified for automotive applications:
– Temperature grade 1: –40°C to +125°C, TA
• Functional Safety-Capable
– Documentation available to aid functional safety
system design
• Configured for rugged automotive applications
– Input voltage range: 3.8 V to 36 V
– Output voltage range: 1 V to 24 V
– Output current: 3 A
– 75-mΩ/50-mΩ RDS-ON power MOSFETs
– Peak-current-mode control
– Short minimum on-time of 68 ns
– Frequency: 400 kHz, 1.4 MHz, 2.1 MHz
– Integrated compensation network
• Low EMI and switching noise
– HotRod™ package
– Parallel input current paths
• High power conversion at all loads
– Peak efficiency > 95%
– Low shutdown quiescent current of 5 µA
– Low operating quiescent current of 25 µA
#CommonPartsLibrary #IntegratedCircuit #PowerManagement #LMR33630
## Component Details
- **Owner:** adrian95
- **Created:** 5/21/2026
- **Last Updated:** 5/21/2026
- **Visibility:** Public
- **Symbol Style:** parametric-v1
- **Package or Case Code:** VQFN-HR (RNX) | 12, RNX0012B, 3 x 2 x 0.85 mm
- **Manufacturer Name:** Texas Instruments
- **Manufacturer Part Number:** LMR33630AQRNXRQ1
- **Datasheet URL:** https://www.ti.com/lit/gpn/lmr33630-q1
- **Part Type:** DC-DC Converters
- **Used in:** 64 projects
## Distributor Pricing (qty 1)
*Pricing shown for quantity 1. For price breaks and other quantities, open in Flux.*
| Distributor | Unit Price (qty 1) | Stock |
|------------|--------------------|-------|
| [Arrow](https://www.arrow.com/en/products/lmr33630aqrnxrq1/texas-instruments.html?utm_currency=USD®ion=nac) | N/A | N/A |
| [Digi-Key](https://www.digikey.com/en/products/detail/texas-instruments/LMR33630AQRNXRQ1/10820178) | N/A | N/A |
| [LCSC](https://www.lcsc.com/product-detail/C1850374.html) | $0.6257 | 817 |
| [Mouser](https://www.mouser.com/ProductDetail/Texas-Instruments/LMR33630AQRNXRQ1?qs=PqoDHHvF64%252BMwl7WEcdMPA%3D%3D) | $3.60 | 0 |
- **Part Type:** Integrated Circuits
- **Sub-Type:** Logic
- **Manufacturer:** Texas Instruments
- **MPN:** LMR33630AQRNXRQ1
- **Mount Type:** PCB
- **Package / Case Code:** 24-VQFN
- **Pin Count:** 12
- **Compliance:** AEC-Q100
## Pins
| Pin | Name | Type |
|-----|------|------|
| 1 | PGND | |
| 2 | VIN | |
| 3 | NC | |
| 4 | BST | |
| 5 | VCC | |
| 6 | AGND | |
| 7 | FB | |
| 8 | PG | |
| 9 | EN | |
| 10 | VIN | |
| 11 | PGND | |
| 12 | SW | |
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