LM43602 3.5V to 36V, 2A Synchronous Step-Down Voltage Converter | TI.com

LM43602 (ACTIVE)

3.5V to 36V, 2A Synchronous Step-Down Voltage Converter

 

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Description

The LM43602 regulator is an easy-to-use synchronous step-down DC-DC converter capable of driving up to 2 A of load current from an input voltage ranging from 3.5 V to 36 V (42-V absolute maximum). The LM43602 provides exceptional efficiency, output accuracy, and dropout voltage in a very small solution size. An extended family is available in 0.5-A, 1-A, and 3-A load current options in pin-to-pin compatible packages. Peak current-mode control is employed to achieve simple control loop compensation and cycle-by-cycle current limiting. Optional features such as programmable switching frequency, synchronization, power-good flag, precision enable, internal soft start, extendable soft start, and tracking provide a flexible and easy-to-use platform for a wide range of applications. Discontinuous conduction and automatic frequency modulation at light loads improve light-load efficiency. The family requires few external components and terminal arrangement allows simple, optimum PCB layout. Protection features include thermal shutdown, VCC undervoltage lockout, cycle-by-cycle current limit, and output short circuit protection. The LM43602 device is available in a 16-lead HTSSOP package (5.1 mm × 6.6 mm × 1.2 mm) and 16-pin VSON package with wettable flanks.

Features

  • 27-µA Quiescent Current in Regulation
  • High Efficiency at Light Load (DCM and PFM)
  • Meets EN55022/CISPR 22 EMI standards
  • Integrated Synchronous Rectification
  • Adjustable Frequency Range: 200 kHz to 2.2 MHz (500 kHz Default)
  • Frequency Synchronization to External Clock
  • Internal Compensation
  • Stable with Almost Any Combination of Ceramic, Polymer, Tantalum, and Aluminum Capacitors
  • Power-Good Flag
  • Soft-Start into a Pre-Biased Load
  • Internal Soft Start: 4.1 ms
  • Extendable Soft-Start Time by External Capacitor
  • Output Voltage Tracking Capability
  • Precision Enable to Program System UVLO
  • Output Short Circuit Protection with Hiccup Mode
  • Overtemperature Thermal Shutdown Protection
  • Create a Custom Design Using the LM43602 with the WEBENCH® Power Designer

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Parametrics Compare all products in Buck converters (integrated switch)

 
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)
Rating
Package Group
Type
Package size: mm2:W x L (PKG)
LM43602 LM43603 LMR23630 LMR33620 LMR33630
3.5     3.5     4.5     3.8     3.8    
36     36     36     36     36    
1     1     1     1     1    
28     28     30     34     34    
2     3     3     2     3    
1     1     1     1     1    
200     200     200     400     400    
2200     2200     2200     2100     2100    
0.027     0.027     0.075     0.024     0.024    
Enable
Frequency Synchronization
Light Load Efficiency
Over Current Protection
Power Good
Pre-Bias Start-Up
Synchronous Rectification
Tracking
Wettable Flanks Package    
Enable
Frequency Synchronization
Light Load Efficiency
Over Current Protection
Power Good
Synchronous Rectification
Tracking    
Enable
Forced PWM
Frequency Synchronization
Light Load Efficiency
Over Current Protection
Pre-Bias Start-Up
Synchronous Rectification
UVLO Adjustable
Wettable Flanks Package    
Enable
Light Load Efficiency
Over Current Protection
Power Good
Pre-Bias Start-Up
Synchronous Rectification
Wettable Flanks Package    
Enable
Light Load Efficiency
Over Current Protection
Power Good
Pre-Bias Start-Up
Synchronous Rectification
Wettable Flanks Package    
Current Mode     Current Mode     Current Mode     Current Mode     Current Mode    
99     99     97     98     98    
-40 to 125     -40 to 125     -40 to 125     -40 to 125     -40 to 125    
Catalog     Catalog     Catalog     Catalog     Catalog    
HTSSOP | 16
SON | 16    
HTSSOP | 16
SON | 16    
SO PowerPAD | 8
SON | 12    
SO PowerPAD | 8
VQFN-HR | 12    
SO PowerPAD | 8
VQFN-HR | 12    
Converter     Converter     Converter     Converter     Converter    
16HTSSOP: 32 mm2: 6.4 x 5 (HTSSOP | 16)
See datasheet (SON)    
16HTSSOP: 32 mm2: 6.4 x 5 (HTSSOP | 16)
See datasheet (SON)    
8SO PowerPAD: 19 mm2: 3.9 x 4.89 (SO PowerPAD | 8)
See datasheet (SON)    
8SO PowerPAD: 19 mm2: 3.9 x 4.89 (SO PowerPAD | 8)
12VQFN-HR: 6 mm2: 3 x 2 (VQFN-HR | 12)    
8SO PowerPAD: 19 mm2: 3.9 x 4.89 (SO PowerPAD | 8)
12VQFN-HR: 6 mm2: 3 x 2 (VQFN-HR | 12)    

Design tool

WEBENCH® Designer LM43602

  Min   Max Range
Vin  V 3.5 to 36.0V
Vout  V 1.01 to 28.0V
Iout  A ≤ 2A
Ambient Temp  °C -40 to 125°C
Package