描述 Description

The FAN53840 is a Power Management IC (PMIC) for mobile power applications such as camera modules. The PMIC contains a high?power regulated channel for digital rails which can operate with an input as low as 1.0 V. Three channels are designed for ultra?low noise and high PSRR for sensitive analog/RF circuit loads. Each channel can be configured to operate as a pass?through load?switch, which reduces the input to output voltage drop and operating currents in critical low power applications. The FAN53840 provides the circuitry for setting and executing start-ups and shut-downs where the outputs can be individually controlled by setting I2C register bits. The PMIC monitors the voltage on each input and prevents the channel from operating if the voltage is below a safe operating level. In LDO mode, the device?limits the current of each channel and protects againts short-circuits. Additionally, in LDO mode, if the device temperature rises too high, the device will shut down until the temperature cools to a safe operating level.

特性 Features

? Wafer?Level Chip?Scale Package (WLCSP)
? Provides extremely compact size
? Very Low Voltage Operating Levels
? The low input/output voltages ensure highest system efficiency
? Soft?Start Function to Limit Inrush Current
? Prevents high surge currents from battery during start-up
? 8mV Programmable Voltages Steps
? Allows for highly accurate compensation for line loss
? I2C Protection Fault (UVLO and OCP in LDO Operation) Registers
? System can quickly determine and respond to LDO faults
? Output Discharge When Shutdown
? I2C control of internal discharge for all channels
? System UVLO and Thermal Global Shutdown Protection in LDO Operation
? System can quickly determine and respond faults to LDO faults
? 0.5% and 0.1% Load Regulation for LDOs
? Excellent load regulation maintains overall accuracy across loads
? Over-temperature Warning in LDO Operation
? Provides warning die temperature is approaching over-temperature shut-down
? Operation Guaranteed with System Voltage Down to 2.6 V
? LDO1: 1.2A, VIN Range: 1.0V to 2.0V, VOUT Range: 0.8V to 1.504V, 1.1% to -1.5% accuracy
? LDO2, LDO3, and LDO4: 300mA, VIN Range: 1.9V to 5.5V, VOUT Range: 1.5V to 3.412V, Less than 20μV (typ) Noise
? Load-switch operation: 100/200mΩ Maximum Channel Resistance, Input Voltage Down to 1.0V and 1.8V
? Current Limit to Protect Against Short-Circuit

應(yīng)用 Application

? Camera module
? Smart phones
? Wearables
? Smart watch
? Utility and safety module
? RF module