MAX8545, MAX8546, MAX8548 Low-Cost, Wide Input Range, Step-Down Controllers With Foldback Current Limit

The MAX8545 MAX8546 MAX8548 are voltage-mode pulse-width-modulated (PWM), Step-down DC-DC Controllers ideal for a variety of cost-sensitive applications. They drive low-cost N-Channel MOSFETs for both the high-side Switch and synchronous Rectifier and require no external current-sense resistor. These devices CAN supply output voltages as low as 0.8V.
The MAX8545 MAX8546 MAX8548 have a wide 2.7V to 28V input range, and do not need any additional bias voltage. The output voltage CAN be precisely regulated from 0.8V to 0.83 x VIN. These devices CAN provide efficiency up to 95%. Lossless short-circuit and current-limit protection is provided by monitoring the RDS(ON) of the low-side MOSFET The MAX8545 and MAX8548 have a current-limit threshold of 320mV, while the MAX8546 has a current-limit threshold of 165mV. All devices feature foldback-current capability to minimize power dissipation under short-circuit condition. Pulling the COMP/EN pin low with an open-collector or low-capacitance, open-drain device CAN shut down all devices.
The MAX8545 MAX8546 operate at 300kHz and the MAX8548 operates at 100kHz. The MAX8545 MAX8546 MAX8548 are compatible with low-cost aluminum electrolytic capacitors. Input undervoltage lockout prevents proper operation under power-sag operations to prevent external MOSFETs from overheating. Internal soft-start is included to reduce inrush current. These devices are offered in space-saving 10-pin MAX packages.
By Maxim Integrated Products
MAX8545 's PackagesMAX8545 's pdf datasheet
MAX8545EUB uMAX
MAX8545EUBT uMAX
MAX8545EUB-T uMAX




MAX8545 Pinout, Pinouts
MAX8545 pinout,Pin out
This is one package pinout of MAX8545,If you need more pinouts please download MAX8545's pdf datasheet.

MAX8545 Application circuits
MAX8545 circuits
This is one application circuit of MAX8545,If you need more circuits,please download MAX8545's pdf datasheet.


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