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Details for TPS65251RHAR by Texas Instruments
Electronic & Electrical Components > Semiconductors - ICs > Power Management
PMU 3 BUCK 2 LDO VQFN-40
TPS65251RHAR image

TPS65251RHAR by Texas Instruments

PMU 3 BUCK 2 LDO VQFN-40
Features
0.8 V, 1% Accuracy Reference
Adjustable Current Limit Set By External Resistor
Adjustable Switching Frequency 300 kHz to 2.2 MHz Set by External Resistor
Continuous Loading: 3 A (Buck 1), 2 A (Buck 2 and 3)
Current-Mode Control With Simple Compensation Circuit
Dedicated Enable for Each Buck
External Enable/Sequencing and Soft-Start Pins
External Synchronization Pin for Oscillator
Maximum Current: 3.5 A (Buck 1), 2.5 A (Buck 2 and 3)
Optional Low-Power Mode Operation for Light Loads
Powergood
Soft-Start Pins
VQFN Package, 40-Pin 6 mm u00d7 6 mm RHA
Wide Input Supply Voltage Range (4.5 to 18 V)
Part Information
TPS65251RHAR image
RoHS Compliant
Description
The TPS65251 features three synchronous wide input range high efficiency buck converters. The converters are designed to simplify its application while giving the designer the option to optimize their usage according to the target application. The converters can operate in 5-, 9-, 12- or 15-V systems and have integrated power transistors. The output voltage can be set externally using a resistor divider to any value between 0.8 V and close to the input supply. Each converter features enable pin that allows a delayed start-up for sequencing purposes, soft-start pin that allows adjustable soft-start time by choosing the soft-start capacitor, and a current limit (RLIMx) pin that enables designer to adjust current limit by selecting an external resistor and optimize the choice of inductor. The current mode control allows a simple RC compensation. The switching frequency of the converters can either be set with an external resistor connected to ROSC pin or can be synchronized to an external clock connected to SYNC pin if needed. The switching regulators are designed to operate from 300 kHz to 2.2 MHz. 180° out of phase operation between Buck 1 and Buck 2, 3 (Buck 2 and 3 run in phase) minimizes the input filter requirements.
Specifications
Supply Voltage:
18V
No. of Step-Down DC - DC Converters:
3
No. of LDO Regulators:
2
No. of Regulated Outputs:
3
Digital IC Case:
VQFN
No. of Pins:
40Pins
Operating Temperature Min:
-40°C
Operating Temperature Max:
125°C
Product Range:
-
Automotive Qualification Standard:
-
RoHS Phthalates Compliant:
Yes
MSL:
MSL 3 - 168 hours
SVHC:
No SVHC (27-Jun-2018)
Operating Temperature Range:
-40°C to +125°C
Alternate Descriptions
PMU, 3 BUCK, 2 LDO, VQFN-40; Supply Voltage:18V; No. of Step-Down DC - DC Converters:3; No. of LDO Regulators:2; No. of Regulated Outputs:3; Digital IC Case:VQFN; No. of Pins:40Pins; Operating Temperature Min:-40°C; Operating RoHS Compliant: Yes Newark Electronics
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