Texas Instruments' LM73605, LM73606, LM73605-Q1, and LM73606-Q1 family of devices are easy-to-use synchronous step-down DC-DC converters capable of driving up to 5 A (LM73605 and LM73605-Q1) or 6 A (LM73606 and LM73606-Q1) of load current from a supply voltage ranging from 3.5 V to 36 V. The LM73605, LM73606, LM73605-Q1, and LM73606-Q1 provide exceptional efficiency and output accuracy in a very small solution size. Peak current-mode control is employed. Additional features such as adjustable switching frequency, synchronization to an external clock, FPWM option, power-good flag, precision enable, adjustable soft start, and tracking provide both flexible and easy-to-use solutions for a wide range of applications. Automatic frequency foldback at light load and optional external bias improve efficiency over the entire load range. The family requires few external components and has a pinout designed for simple PCB layout with optimal EMI and thermal performance. Protection features include thermal shutdown, input undervoltage lockout, cycle-by-cycle current limiting, and hiccup short-circuit protection. The LM73605, LM73606, LM73605-Q1, and LM73606-Q1 devices are pin-to-pin compatible for easy current scaling.
The LM73605EVM-5V-2MHZ evaluation module (EVM) is a fully assembled and tested circuit for evaluating the LM73605 synchronous step-down voltage converter. The EVM operates from 6 V to 36 V input and provides a 5 V output voltage with 5 A maximum load current.
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- AEC-Q100 qualified for automotive applications (LM73605-Q1 and LM73606-Q1)
- Device temperature Grade 1: -40°C to +125°C junction operating temperature
- Device HBM ESD Classification Level 2 kV
- Device CDM ESD Classification Level C5
- Synchronous rectification
- Wettable flanks QFN package (WQFN)
- Low quiescent current
- 0.8 µA in shutdown (typ.)
- 15 µA in active mode with no load (typ.)
- Wide voltage conversion range:
- tON_MIN = 60 ns (typ.)
- tOFF_MIN = 70 ns (typ.)
- Low MOSFET ON-resistance:
- RDS(ON)_HS = 53 mΩ (typ.)
- RDS(ON)_LS = 31 mΩ (typ.)
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- External bias input to improve efficiency
- Pin-selectable auto mode or forced PWM operation
- Adjustable frequency range: 350 kHz to 2.2 MHz
- Synchronizable to external clock
- Internal compensation
- Power-good flag
- Precision enable to program system UVLO
- Flexible soft-start features:
- Start-up into pre-biased load
- Fixed or adjustable soft-start time
- Output voltage tracking
- Cycle-by-cycle current limiting
- Short-circuit protection with hiccup mode
- Thermal shutdown protection
- Create a custom design with the WEBENCH® Power Designer using LM73605, LM73606, LM73605-Q1, or LM73606-Q1
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- Automotive distributed power applications (LM73605-Q1 and LM73606-Q1)
- Battery-powered applications
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- Industrial distributed power applications
- Telecommunications systems
- General-purpose wide VIN regulation
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Texas Instruments' LM73605, LM73606, LM73605-Q1, and LM73606-Q1 family of devices are easy-to-use synchronous step-down DC-DC converters capable of driving up to 5 A (LM73605 and LM73605-Q1) or 6 A (LM73606 and LM73606-Q1) of load current from a supply voltage ranging from 3.5 V to 36 V. The LM73605, LM73606, LM73605-Q1, and LM73606-Q1 provide exceptional efficiency and output accuracy in a very small solution size. Peak current-mode control is employed. Additional features such as adjustable switching frequency, synchronization to an external clock, FPWM option, power-good flag, precision enable, adjustable soft start, and tracking provide both flexible and easy-to-use solutions for a wide range of applications. Automatic frequency foldback at light load and optional external bias improve efficiency over the entire load range. The family requires few external components and has a pinout designed for simple PCB layout with optimal EMI and thermal performance. Protection features include thermal shutdown, input undervoltage lockout, cycle-by-cycle current limiting, and hiccup short-circuit protection. The LM73605, LM73606, LM73605-Q1, and LM73606-Q1 devices are pin-to-pin compatible for easy current scaling.
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