illustrate

The TPS51427A is a dual synchronous buck controller designed for laptop and mobile communication applications. This device is a laptop power bus regulator low-cost kit that makes the number of external components low as part of the system design. The TPS51427A includes two pulse width modulation (PWM) controllers, SMPS1 and SMPS2. The SMPS1 output can be adjusted from 0.7 V to 5.9 V, while the output SMPS2 can be adjusted from 0.5 V to 2.5 V, and the device also has a low dropout (LDO) regulator that provides a 5-V/3.3-V output or an output adjustable from 0.7 to 4.5-V via LDOREFIN. Fixed-frequency analog adaptive on-time control reduces operating frequency under high load conditions to support seamless operation between PWM modes in the low-efficiency drop-down to light-load milliampere range.

characteristic

• Fixed-frequency analog on-time control with three options to choose from
• ð - mode 1 ™ achieves a fast transient response of less than 100 ns
• Advanced ramp compensation allows for low output ripple with minimal jitter
• Optional PWM-Only/OOA™/Auto Skip mode
• Wide input voltage range: 5.5 V to 28 V
• Dual fixed or adjustable switching power supplies:
  • 0.7 V to 5.9 V (Channel 1)
  • 0.5 V to 2.5 V (channel 2)
• Fixed 3.3-V/5-V, or LDO with adjustable output 0.7 V to 4.5-V with a capability of 100 mA
• Fixed 3.3 - VREF output 10 mA procurement capable
• Temperature-compensated low-end R DS(ON) current sensing
• Adaptive gate driver with integrated boost switch
• Bootstrap charging automatically refreshes
• Built-in soft start, soft stop tracking
• Independent PYOOD and each faith is graceful
• Out-of-band functions are prohibited. TPS51427 is a device with OOB functionality for reference
• apply
  • I/O for laptops and Rails for system buses
  • Graphics application
  • Handheld computers and mobile communication devices