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

TPS65262 (ACTIVE)

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

 

Recommended alternative parts

  • TPS65261  - The device has SIMILAR FUNCTIONALITY but is not functionally equivalent to the compared device.   4.5V to 18V Input, 3A/2A/2A Triple Synchronous Step-Down Converter

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 Buck Converter (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)
Special Features
Control Mode
Duty Cycle (Max) (%)
Operating Temperature Range (C)
Rating
Package Group
Approx. Price (US$)
TPS65251 TPS65251-1 TPS65251-2 TPS65251-3 TPS65261 TPS65261-1 TPS65262-1 TPS65262-2 TPS65263
4.5     4.5     4.5     4.5     4.5     4.5     1.3     1.3     4.5    
18     17     17     17     18     18     18     18     18    
0.8     0.8     0.8     0.8     0.6     0.6       0.6      
17     17     17     17           17      
3     3     3     3     3     3     3     3     3    
3     3     3     3     3     3     5     5     3    
300     300     300     300     250     250          
2200     2200     2200     2200     2000     2000          
20     1     1     1     0.6     0.6     0.79     0.79     0.74    
Adjustable Current Limit
Enable
Frequency Synchronization
Phase Interleaving
Power Good
Synchronous Rectification
UVLO Adjustable    
Adjustable Current Limit
Enable
Frequency Synchronization
Light Load Efficiency
Phase Interleaving
Power Good
Synchronous Rectification
UVLO Adjustable    
Adjustable Current Limit
Enable
Frequency Synchronization
Light Load Efficiency
Phase Interleaving
Power Good
Synchronous Rectification
UVLO Adjustable    
Adjustable Current Limit
Enable
Frequency Synchronization
Light Load Efficiency
Phase Interleaving
Power Good
Synchronous Rectification
UVLO Adjustable    
Enable
Light Load Efficiency
Power Good
Synchronous Rectification
UVLO Adjustable    
Enable
Power Good
Synchronous Rectification
UVLO Adjustable    
Adjustable Current Limit
Enable
Light Load Efficiency
Power Good
Synchronous Rectification
UVLO Adjustable    
Adjustable Current Limit     Adjustable Current Limit
Dynamic Voltage Scaling
Enable
Light Load Efficiency
Power Good
Synchronous Rectification
UVLO Adjustable    
Current Mode     Current Mode     Current Mode     Current Mode     Current Mode     Current Mode     Current Mode     Current Mode     Current Mode    
  90     90     90     95     95     100     100     100    
-40 to 125     -40 to 125     -40 to 125     -40 to 125     -40 to 85     -40 to 85     -40 to 85     -40 to 85     -40 to 85    
Catalog     Catalog     Catalog     Catalog     Catalog     Catalog     Catalog     Catalog     Catalog    
VQFN     VQFN     VQFN     VQFN     VQFN     VQFN     VQFN     VQFN     VQFN    
2.10 | 1ku     2.10 | 1ku     2.10 | 1ku     2.10 | 1ku     1.60 | 1ku     1.60 | 1ku     2.05 | 1ku     2.05 | 1ku     2.35 | 1ku    

WEBENCH® Designer TPS65262

  Min   Max Range
Vin1  V 4.50 to 18.00V
Vout1  V 0.60 to 5.50V
Iout1  A ≤ 3.00A
 
Vin2  V 4.50 to 18.00V
Vout2  V 0.60 to 5.50V
Iout2  A ≤ 1.00A
 
Vin3  V 4.50 to 18.00V
Vout3  V 0.60 to 5.50V
Iout3  A ≤ 1.00A
 
Vin4  V 1.30 to 18.00V
Vout4  V 1.00 to 5.50V
Iout4  A ≤ 0.33A

Vin5  V 1.30 to 18.00V
Vout5  V 1.00 to 5.50V
Iout5  A ≤ 0.18A

Ambient Temp  °C -40 to 125°C


Footprint BOM Cost Efficiency

 
'Cvdd Cldo12 Rp L1_ch1 Cin_ch1 Rfbb_ch1 Rfbt_ch1 C1_ch1 Cout_ch1 L1_ch2 Cin_ch2 Rfbb_ch2 Rfbt_ch2 C1_ch2 Cout_ch2 Cin_ch3 Cout_ch3 Rfbt_ch3 Rfbb_ch3 Cin_ch4 Cout_ch4 Rfbt_ch4 Rfbb_ch4'