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 Power Management Multi-Channel IC (PMIC) Solutions

 
Regulated Outputs (#)
Vin (Min) (V)
Vin (Max) (V)
LDO
Step-Down DC/DC Converter
Iout (Max) (A)
Iq (Typ) (mA)
Special Features
Shutdown Current (Typ) (uA)
Rating
Operating Temperature Range (C)
Pin/Package
Approx. Price (US$)
TPS65261 TPS65261-1 TPS65262-1 TPS65263
3     3     5     3    
4.5     4.5     4.5     4.5    
18     18     18     18    
0     0     2      
3     3     3     3    
3     3     3     3    
0.6     0.6     0.79     0.74    
    Adjustable
Enable
Over Current Protection
PFM/PWM
Power Good
Synchronous Rectification
Thermal Shutdown
UVLO
VFB accuracy 1%
nPOR/Power good    
Adjustable
Dynamic Voltage Scaling
Enable
Ext Adjustable
I2C Control
Over Current Protection
Power Good
Thermal Shutdown
UVLO
VFB accuracy 1%    
9.2     9.2     12     8    
Catalog     Catalog     Catalog     Catalog    
-40 to 85     -40 to 85     -40 to 85     -40 to 85    
32VQFN     32VQFN     32VQFN     32VQFN    
1.90 | 1ku     1.90 | 1ku     2.05 | 1ku     2.35 | 1ku    
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