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Texas Instruments LM53635-Q1 | Demoboard TIDA-01055
2.5/3.5A, 36 V Synchronous, 2.1MHz, Automotive Step Down DC-DC Converter
Overview
| Topology | Buck Converter |
| Input voltage | 3.9-36 V |
| Switching frequency | 1850-2350 kHz |
| Output 1 | 5.2 V / 3.5 A |
| IC revision | A |
Description
The LM53625-Q1/LM53635-Q1 synchronous buck regulator is optimized for automotive applications, providing an output voltage of 5 V, 3.3 V, or an adjustable output. Advanced high-speed circuitry allows the LM53625-Q1/LM53635-Q1 to regulate from an input of 18 V to an output of 3.3 V at a fixed frequency of 2.1 MHz. Innovative architecture allows this device to regulate a 3.3-V output from an input voltage of only 3.55 V. All aspects of the LM53625-Q1/LM53635-Q1 are optimized for automotive and performance-driven industrial customers. An input voltage range up to 36 V, with transient tolerance up to 42 V, eases input surge protection design. The automotive-qualified Hotrod QFN package with wettable flanks reduces parasitic inductance and resistance while increasing efficiency, minimizing switch node ringing, and dramatically lowering electromagnetic interference (EMI). An open-drain reset output, with built-in filtering and delay, provides a true indication of system status. This feature negates the requirement for an additional supervisory component, saving cost and board space. Seamless transition between PWM and PFM modes and low quiescent current (only 15 µA for the 3.3 V option) ensure high efficiency and superior transient responses at all loads.
Features
- AEC-Q100 Automotive Qualified:
- Device Temperature Grade 1: –40°C to +125°C Ambient Operating Temperature Range
- Device HBM Classification Level 2
- Device CDM Classification Level C6
- –40°C to +150°C Junction Temperature Range
- 15-µA Quiescent Current at no Load (Typical) with 3.3-V Output
- 4 mm × 5 mm, 0.5-mm Pitch VQFN Package With Wettable Flanks and 0.6-mm VIN Spacing
- Low EMI and Switch Noise
- Spread Spectrum Option
- External Frequency Synchronization
- RESET Output with Internal Filter and 3-ms Release Timer
- Pin-Selectable Forced PWM Mode
- Built-In Compensation, Soft Start, Current Limit, Thermal Shutdown, and UVLO
- 0.6-V Dropout at 3.5 A at 105°C TA
- ±1% Output Voltage Tolerance (–40°C to 125°C TJ)
- Available With Fixed 5-V, 3.3-V or Adjustable Output
Typical applications
- Automotive Telematics, In-Dash Instrumentation, Navigation Systems
- Battery-Powered Applications
More information
Products
Order Code | Datasheet | Simulation | Downloads | Status | Product series | Pins | PCB/Cable/Panel | Modularity | Type | Wire Section | λDom typ.(nm) | Emitting Color | λPeak typ.(nm) | IV typ.(mcd) | VF typ.(V) | Chip Technology | 2θ50% typ.(°) | C | Tol. C | VR(V (DC)) | Size | Operating Temperature | Q(%) | RISO | Ceramic Type | L(mm) | W(mm) | H(mm) | Fl(mm) | Packaging | L(µH) | IR(A) | ISAT(A) | fres(MHz) | Mount | Ti | Ø ID(mm) | Ø OD(mm) | Qty. | Working Voltage(V (AC)) | Samples | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
 | WE-TPC SMT Tiny Power Inductor, 2, – | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWE-TPC SMT Tiny Power Inductor | Pins2 | – | – | – | – | – | – | – | – | – | – | – | – | – | – | Size2828 | Operating Temperature -40 °C up to +125 °C | – | – | – | Length2.8 mm | Width2.8 mm | Height2.8 mm | – | – | Inductance6.8 µH | Rated Current1.1 A | Saturation Current1.3 A | Self Resonant Frequency59 MHz | MountSMT | – | – | – | Packaging Unit550 | – | ||||
 | WE-TPC SMT Tiny Power Inductor, 2, – | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWE-TPC SMT Tiny Power Inductor | Pins2 | – | – | – | – | – | – | – | – | – | – | – | – | – | – | Size3816 | Operating Temperature -40 °C up to +125 °C | – | – | – | Length3.8 mm | Width3.8 mm | Height1.65 mm | – | – | Inductance68 µH | Rated Current0.32 A | Saturation Current0.22 A | Self Resonant Frequency12 MHz | MountSMT | – | – | – | Packaging Unit1000 | – | ||||
 | WR-TBL Series 213 - 5.00 mm Horiz.l Entry Modular, 2, Rising Cage Clamp | Simulation– | Downloads6 files | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWR-TBL Series 213 - 5.00 mm Horiz.l Entry Modular | Pins2 | PCB/Cable/PanelPCB | ModularityYes | TypeHorizontal | Wire Section 26 to 16 (AWG) 0.5 to 1.5 (mm²) | – | – | – | – | – | – | – | – | – | – | – | Operating Temperature -40 °C up to +105 °C | – | – | – | Length10 mm | – | – | – | PackagingBox | – | Rated Current10 A | – | – | MountTHT | – | – | – | – | Working Voltage250 V (AC) | ||
 | WR-PHD Pin Header - Single, 2, – | Simulation– | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWR-PHD Pin Header - Single | Pins2 | – | – | TypeStraight | – | – | – | – | – | – | – | – | – | – | – | – | Operating Temperature -40 °C up to +105 °C | – | Insulation Resistance1000 MΩ | – | Length5.08 mm | – | – | – | PackagingBag | – | Rated Current3 A | – | – | MountTHT | – | – | – | – | Working Voltage250 V (AC) | |||
 | WR-PHD Pin Header - Single, 3, – | Simulation– | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWR-PHD Pin Header - Single | Pins3 | – | – | TypeStraight | – | – | – | – | – | – | – | – | – | – | – | – | Operating Temperature -40 °C up to +105 °C | – | Insulation Resistance1000 MΩ | – | Length7.62 mm | – | – | – | PackagingBag | – | Rated Current3 A | – | – | MountTHT | – | – | – | – | Working Voltage250 V (AC) | |||
 | WL-SMCW SMT Mono-color Chip LED Waterclear, –, – | Downloads27 files RAY files
| Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWL-SMCW SMT Mono-color Chip LED Waterclear | – | – | – | – | – | Dominant Wavelength [typ.]625 nm | Emitting ColorRed | Peak Wavelength [typ.]630 nm | Luminous Intensity [typ.]250 mcd | Forward Voltage [typ.]2 V | Chip TechnologyAlInGaP | Viewing Angle Phi 0° [typ.]140 ° | – | – | – | Size0603 | Operating Temperature -40 °C up to +85 °C | – | – | – | Length1.6 mm | Width0.8 mm | Height0.7 mm | – | PackagingTape and Reel | – | – | – | – | MountSMT | – | – | – | Packaging Unit4000 | – | |||
| WCAP-CSGP MLCCs 50 V(DC), –, – | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWCAP-CSGP MLCCs 50 V(DC) | – | – | – | – | – | – | – | – | – | – | – | – | Capacitance100 pF | Capacitance±5% | Rated Voltage50 V (DC) | Size0603 | Operating Temperature -55 °C up to +125 °C | Q-Factor1000 % | Insulation Resistance10 GΩ | Ceramic TypeNP0 Class I | Length1.6 mm | Width0.8 mm | Height0.8 mm | Pad Dimension0.4 mm | Packaging7" Tape & Reel | – | – | – | – | – | – | – | – | Packaging Unit4000 | – | |||||
 | WA-SMSI SMT Steel Spacer with internal Thread M3, –, – | Simulation– | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWA-SMSI SMT Steel Spacer with internal Thread M3 | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | Operating Temperature -55 °C up to +150 °C | – | – | – | Length5 mm | – | – | – | PackagingTape and Reel | – | – | – | – | – | Inner ThreadM3 | Inner Diameter4.2 mm | Outer Diameter6 mm | Packaging Unit650 | – |