TPS65051-Q1 Automotive 1.5V to 6.5V, 2 Buck & 4 LDO Power Management IC |

TPS65051-Q1 (ACTIVE)

Automotive 1.5V to 6.5V, 2 Buck & 4 LDO Power Management IC



The TPS65051-Q1 device is an integrated power-management IC for applications powered by one Li-Ion or Li-Polymer cell, which requires multiple power rails. The TPS65051-Q1 device provides two efficient, 2.25-MHz step-down converters targeted at providing the core voltage and I/O voltage in a processor-based system. Both step-down converters enter a low-power mode at light load for maximum efficiency across the widest possible range of load currents.

For low-noise applications, the user can force the devices into fixed-frequency PWM mode by pulling the MODE pin high. Operating in the shutdown mode reduces the current consumption to less than 1 μA. The devices allow the use of small inductors and capacitors to achieve a small solution size. The TPS65051-Q1 device provides an output current of up to 1 A (DCDC1) and 0.6 A (DCDC2). The TPS65051-Q1 device also integrates two 400-mA LDO and two 200-mA LDO voltage regulators, which one can turn on or off using separate enable pins on each LDO. Each LDO operates with an input voltage range between 1.5 V and 6.5 V, allowing the supply to be from one of the step-down converters or directly from the main battery.

The LDO voltage of the TPS65051-Q1 device is adjustable using external resistor dividers.

For all available packages, see the orderable addendum at the end of the datasheet.


  • Qualified for Automotive Applications
  • AEC-Q100 Qualified With the Following Results:
    • Device Temperature Grade 1: –40°C to +125°C Ambient Operating Temperature Range
    • Device HBM ESD Classification Level H2
    • Device CDM ESD Classification Level C3B
  • Up To 95% Efficiency
  • Output Current for DC-DC Converter:
    DCDC1 = 1 A; DCDC2 = 0.6 A
  • Externally Adjustable Output Voltage for DC-DC Converter
  • VI Range for DC-DC Converters
    From 2.5 V to 6 V
  • 2.25-MHz Fixed-Frequency Operation
  • Power-Save Mode at Light Load Current
  • 180° Out-of-Phase Operation
  • Output-Voltage Accuracy in PWM Mode ±1%
  • Low-Ripple PFM Mode
  • Total Typical 32-μA Quiescent Current for Both DC-DC Converters
  • 100% Duty Cycle for Lowest Dropout
  • Two General-Purpose 400-mA, High-PSRR LDOs
  • Two General-Purpose 200-mA, High-PSRR LDOs
  • VI Range for LDOs from 1.5 V to 6.5 V
  • Digital Voltage Selection for the LDOs
  • Available in a 4-mm × 4-mm 32-Pin VQFN Package

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Parametrics Compare all products in Multi-channel ICs (PMIC)

Regulated outputs (#)
Processor supplier
Processor name
Vin (Min) (V)
Vin (Max) (V)
Step-Up DC/DC Controller
Step-Down DC/DC Controller
Step-Up DC/DC Converter
Step-Down DC/DC Converter
Iout (Max) (A)
Iq (Typ) (mA)
Operating temperature range (C)
Package Group
Package size: mm2:W x L (PKG)
-40 to 125    
VQFN | 32    
32VQFN: 16 mm2: 4 x 4 (VQFN | 32)