HL7542

HL7542 is a synchronous buck converter optimized to supply different sub systems of portable applications. Its input voltage range is 2.2V to 5.5V.HL7542 can deliver up to 0.8A with high efficiency, while maintaining over 92% efficiency at load currents as low as 1mA. It operates at a high frequency of 1.5MHz, which greatly reduces the value of the external components. At light load conditions, it seamlessly enters Power Save Mode to reduce switching cycles and maintain high efficiency with a typical non-switching quiescent current of 1.8uA, even with such a low quiescent current, HL7542 maintains excellent load and line transient responses. Connecting the VSEL/MODE pin to GND selects a fixed output voltage. With only one external resistor connected to VSEL/MODE pin, 16 internally set output voltages can be selected. An integrated R2D(resistor to digital) converter reads out the external resistor and sets the output voltage. The same device part number can be used for different applications and voltage rails just by changing a single resistor. Once the device has started up, the DC/DC converter enters Forced PWM Mode by applying a high level at the VSEL/MODE pin. In this operating mode, the device runs at a typical 1.5-MHz switching frequency, enabling lowest output voltage ripple and highest efficiency.The HL7542 is available in a 1.193x 0.783mm WLCSP-6 package.

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- Commodity name: HL7542
- 产品名称: 0.8A Synchronous Step-Down Converter
- 产品简介: HL7542 is a synchronous buck converter optimized to supply different sub systems of portable applications. Its input voltage range is 2.2V to 5.5V.HL7542 can deliver up to 0.8A with high efficiency, while maintaining over 92% efficiency at load currents as low as 1mA. It operates at a high frequency of 1.5MHz, which greatly reduces the value of the external components. At light load conditions, it seamlessly enters Power Save Mode to reduce switching cycles and maintain high efficiency with a typical non-switching quiescent current of 1.8uA, even with such a low quiescent current, HL7542 maintains excellent load and line transient responses. Connecting the VSEL/MODE pin to GND selects a fixed output voltage. With only one external resistor connected to VSEL/MODE pin, 16 internally set output voltages can be selected. An integrated R2D(resistor to digital) converter reads out the external resistor and sets the output voltage. The same device part number can be used for different applications and voltage rails just by changing a single resistor. Once the device has started up, the DC/DC converter enters Forced PWM Mode by applying a high level at the VSEL/MODE pin. In this operating mode, the device runs at a typical 1.5-MHz switching frequency, enabling lowest output voltage ripple and highest efficiency.The HL7542 is available in a 1.193x 0.783mm WLCSP-6 package.
- 1.8-μA Operating quiescent current
- Up to 1.5-MHz switching frequency
- Output Current 0.8A
- 1% Output voltage accuracy
- Selectable Power Save / Forced PWM Mode
- 16 Selectable + 1 Fixed Output Voltages
  - HL7542WL01: 0.4 V to 0.775 V, 25mV/step
  - HL7542WL02: 0.8 V to 1.55 V, 50mV/step
  - HL7542WL03: 1.8 V to 3.3 V, 100mV/step
  - HL7542WL04: 0.6 V to 3.3 V, 16 selectable
- Optimized pinout to support 0201 components
- Output Discharge
- Tiny 6-pin, 0.35 mm Pitch WCSP package
- Supports <5 mm² solution size
- Supports <0.6 mm solution height
- Comprehensive Protections
  - Input Under-Voltage Lockout (UVLO)
  - Over-Current Protection
  - Short-Circuit Protection
  - Thermal Shut-down
- 1.193mm x 0.783mm 6Bump WLCSP Package
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- Wearables
- Fitness Trackers
- Smart Watches
For more information or a full datasheet request, please contact the factory at sales@halomicro.com.

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