18V Input, 3A/1A/1A Triple Synchronous Step-Down Converter with 200mA/100mA Dual LDOs - TPS65262

TPS65262 (PREVIEW)

18V Input, 3A/1A/1A Triple Synchronous Step-Down Converter with 200mA/100mA Dual LDOs

Description

The TPS65262 is a monolithic triple synchronous step-down (buck) converter with 3-A/1-A/1-A output current. A wide 4.5- to 18-V input supply voltage range encompasses the most intermediate bus voltage operating off 5-, 9-, 12-, or 15-V power bus. The converter, with constant frequency peak current mode, is designed to simplify its application while giving designers options to optimize the system according to targeted applications. The device operates at 600-kHz fixed switching frequency. The loop compensations for buck 2 and buck3 have been integrated for less external components. The 180° out-of-phase operation between buck1 and buck2, 3 (buck2 and buck3 run in phase) minimizes the input filter requirements. At light load, the device automatically operates in PSM, which provides high efficiency by reducing switching losses.

Two low dropout voltage linear regulators (LDO) are also built in TPS65262 with input voltage range 1.3 to 18 V, continuous output current 200 mA/100 mA, independent enable and adjustable output voltage.

The TPS65262 features an automatic power sequence with driving MODE pin to high and configuring EN1, EN2, and EN3 pins.

The device features overvoltage protection, overcurrent and short-circuit protection, and overtemperature protection. A power good pin asserts when any output voltages are out of regulation.

Features

  • Operating Input Voltage Range: 4.5 to 18 V
  • Feedback Reference Voltage: 0.6 V ±1%
  • Maximum Continuous Output Current: 3 A/1 A/1 A
  • Fixed 600-kHz Switching Frequency
  • Integrated Dual LDOs With Input Voltage Range:
    1.3 to 18 V and Continuous Output Current:
    200 mA/100 mA
  • Programmable Soft Start Time for Buck1
  • Fixed 1-ms Soft Start Time for Buck2 and Buck3
  • Internal Loop Compensation for Buck2 and Buck3
  • Dedicated Enable Pins for Each Buck
  • Automatic Power-Up/Power-Down Sequence
  • Pulse Skipping Mode (PSM) at Light Load
  • Output Voltage Power Good Indicator
  • Thermal Overloading Protection
  • 32-Pin VQFN (RHB) 5-mm × 5-mm Package

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Parametrics Compare all products in Step-Down (Buck) Converter

 
Regulated Outputs (#)
Vin (Min) (V)
Vin (Max) (V)
Vout (Min) (V)
Vout (Max) (V)
Iout (Max) (A)
Topology
Switching Frequency (Max) (kHz)
Switch Current Limit (Typ) (A)
Iq (Typ) (mA)
Duty Cycle (Max) (%)
Soft Start
Compensation
Special Features
Brand
Control Mode
Preset Vout (V)
Vref Accuracy (Typ) (%)
Rating
Operating Temperature Range (C)
Pin/Package
Approx. Price (US$)
TPS65262 LM2596 LM2576 TPS5430 LM2576HV TPS54340 LM2675 TPS54620 TPS50601-SP TPS54331 TPS62740 LM5010A-Q1 TPS62730
      1       1       1     1       1     1     1    
      5.5       4.5       4.5     3       2.2     6     1.9    
      36       42       17     6.3       5.5     75     3.9    
      1.23       0.8       0.8     0.785       1.8     2.5     2.1    
      31       41       15     5.5       3.3     70     2.1    
  3     3     3     3     3.5     1     6     6     3     0.3     1     0.1    
      Buck
Inverting Buck-Boost    
  Buck
Inverting Buck-Boost    
  Buck     Buck       Buck     Buck     Buck    
      500       2500       1600     1000         1000      
      4       5.5       8     11       0.6     1.25     0.41    
      3       0.146     2.5     0.6     5     0.11     0.0003     0.65     0.025    
      87       98     95     98     85     90     100     99     100    
      Fixed       Fixed       Adjustable     Adjustable       Fixed     Adjustable     Fixed    
  Internal     Internal     Internal     Internal     External     Internal     External     External     External     Internal     Not Needed     Internal    
      Enable       Enable
Frequency Synchronization
Light Load Efficiency
Adjustable UVLO    
  Enable
Frequency Synchronization
Power Good
Tracking
Synchronous Rectification    
Enable
Frequency Synchronization
Power Good
Tracking    
  Dynamic Voltage Scaling
Enable
Light Load Efficiency
Output Discharge
Synchronous Rectification    
Enable     Enable
Light Load Efficiency
Synchronous Rectification    
  SIMPLE SWITCHER     SIMPLE SWITCHER     SWIFT     SIMPLE SWITCHER       SIMPLE SWITCHER     SWIFT         DCS-Control       DCS-Control    
  Voltage Mode     Voltage Mode     Voltage Mode     Voltage Mode     Current Mode     Voltage Mode     Current Mode     Current Mode     Current Mode       Constant on-time (COT)      
                        2.1    
      1.5       1       1     1.258       2.5     2     1.5    
  Catalog     Catalog     Catalog     Catalog     Catalog     Catalog     Catalog     Space     Catalog     Catalog     Automotive     Catalog    
  -40 to 125     -40 to 125     -40 to 125     -40 to 125     -40 to 125     -40 to 125     -40 to 150     -55 to 125
25 Only    
-40 to 150     -40 to 85     -40 to 125
-40 to 150    
-40 to 85    
  5DDPAK/TO-263
5TO-220    
5DDPAK/TO-263
5TO-220    
8SO PowerPAD     5DDPAK/TO-263
5TO-220    
8SO PowerPAD     16WSON
8PDIP
8SOIC    
14VQFN     20CFP     8SO PowerPAD
8SOIC    
12WSON     14HTSSOP     6SON    
  1.80 | 1ku     1.19 | 1ku     1.85 | 1ku     2.30 | 1ku     1.68 | 1ku     1.60 | 1ku     2.50 | 1ku       0.60 | 1ku     1.15 | 1ku     1.75 | 1ku     0.65 | 1ku    
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