LMR36506 3-V to 65-V, 0.6-A ultra-small synchronous buck converter with 4 μA IQ | TI.com

LMR36506
This product is prototype/experimental and has not been released to the market. Testing and final processes may not be complete. This product may be subject to further changes or possible discontinuation.
3-V to 65-V, 0.6-A ultra-small synchronous buck converter with 4 μA IQ

 

Sample availability

Preproduction samples are available (PLMR36506RRPET). Request now

Description

The LMR36506 is the industry’s smallest 65 V, 0.6 A synchronous step-down DC/DC converter in 2-mm x 2-mm HotRod™ package. This robust and highly reliable converter can handle input voltage transients up to 70 V, provide excellent EMI performance and support fixed 3.3 V and other adjustable output voltages. The transient tolerance reduces the necessary design effort to protect against input overvoltage and meets the surge immunity requirements of IEC 61000-4-5.

The LMR36506 uses the peak current mode control architecture with internal compensation to maintain stable operation with minimal output capacitance. The LMR36506 with the right resistor selection from the RT pin to ground can be externally programmed to any desired switching frequency of operation over a wide range from 200 kHz to 2.2 MHz. The precision EN/UVLO feature allows precise control of the device during the start-up and shutdown. The power-good flag, with built-in glitch filter and delayed release, offers a true indication of the system status, eliminating the requirement for an external supervisor. The compact solution size and rich feature set of LMR36506 simplifies implementation for a wide range of industrial applications.

Features

  • Designed for rugged industrial applications:
    • Junction temperature range –40°C to +150°C
    • Input transient protection up to 70 V
    • Wide input voltage range: 3.0 V (falling threshold) to 65 V
    • Low EMI and minimized switch node ringing
    • Adjustable fixed output voltage options available
  • Suited for scalable industrial power supplies:
    • Pin compatible with LMR36503 (65 V, 300 mA)
    • Adjustable switching frequency: 200 kHz to 2.2 MHz with RT pin variant
  • Minimized solution size and cost:
    • Highest power density with internal compensation and reduced external component count
    • Ultra-small, 2-mm × 2-mm HotRod™ package with wettable flanks
  • High efficiency across load range with low power dissipation:
    • 93% peak efficiency at 400 kHz (12 VIN, 3.3 VOUT fixed)
    • 90% peak efficiency at 400 kHz (24 VIN, 3.3 VOUT fixed)
  • Ultra-low operating quiescent current at no load
    • 4 µA at 24 VIN to 3.3 VOUT (fixed output option)

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Parametrics

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Part number Order Vin (Min) (V) Vin (Max) (V) Vout (Min) (V) Vout (Max) (V) Iout (Max) (A) Regulated outputs (#) Switching frequency (Min) (kHz) Switching frequency (Max) (kHz) Iq (Typ) (mA) Features Control mode Duty cycle (Max) (%) Operating temperature range (C) Package Group Rating Type Package size: mm2:W x L (PKG)
LMR36506 Order now 3     65     1     60     0.6     1     200     2200     0.007     Enable
Fixed Output
Forced PWM
Frequency Synchronization
Light Load Efficiency
Over Current Protection
Power Good
Pre-Bias Start-Up
Soft Start Fixed
Synchronous Rectification
Wettable Flanks Package    
Current Mode     98     -40 to 150     VQFN-HR | 9     Catalog     Converter     9VQFN-HR: 4 mm2: 2 x 2 (VQFN-HR | 9)    
LMR36006 Order now 4.2     60     1     57     0.6     1     1000     2100     0.023     Enable
Light Load Efficiency
Over Current Protection
Power Good
Pre-Bias Start-Up
Synchronous Rectification
Wettable Flanks Package    
Current Mode     98     -40 to 150     VQFN-HR | 12     Catalog     Converter     12VQFN-HR: 6 mm2: 3 x 2 (VQFN-HR | 12)    
LMR36015 Order now 4.2     60     1     57     1.5     1     400     1000     0.023     Enable
Forced PWM
Light Load Efficiency
Over Current Protection
Power Good
Pre-Bias Start-Up
Synchronous Rectification
Wettable Flanks Package    
Current Mode     98     -40 to 150     VQFN-HR | 12     Catalog     Converter     12VQFN-HR: 6 mm2: 3 x 2 (VQFN-HR | 12)    
LMR36503 Samples not available 3     65     1     60     0.3       200     2200     0.007     Enable
Fixed Output
Forced PWM
Frequency Synchronization
Light Load Efficiency
Over Current Protection
Power Good
Pre-Bias Start-Up
Soft Start Fixed
Synchronous Rectification
Wettable Flanks Package    
  98     -40 to 150     VQFN-HR | 9     Catalog     Converter     9VQFN-HR: 4 mm2: 2 x 2 (VQFN-HR | 9)    
LMR36510 Samples not available 4.2     65     1     62     1     1     340     460     0.026     Enable
Light Load Efficiency
Over Current Protection
Power Good
Soft Start Fixed
UVLO Fixed    
Current Mode     98     -40 to 125     SO PowerPAD | 8     Catalog     Converter     8SO PowerPAD: 19 mm2: 3.9 x 4.89 (SO PowerPAD | 8)    
LMR36520 Order now 4.2     65