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SEMTECH SC621AULTRT product image
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SEMTECH SC621AULTRT

Manufacturer
SEMTECH
MPN
SC621AULTRT
LCSC Part #
C2679275
Packaging
QFN-20-EP(3x3)
Customer #
Key Attributes
2.5V~5.25V 250kHz 5 Charge Pump DC-DC 3V~5.5V QFN-20-EP(3x3) LED Drivers ICs
DatasheetSEMTECH SC621AULTRT
Every Order Guarantee
100% Authentic · 30-Day Return or Replacement
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QtyUnit Price(Reference Only)Total Amount
1+$ 1.9288$ 1.93
200+$ 0.7468$ 149.36
500+$ 0.7206$ 360.30
1,000+$ 0.7083$ 708.30
Standard Packaging3000/Full Reel
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Products Specifications

All
TypeDescription
CategoryIntegrated Circuits (ICs)/Power Management (PMIC)/LED Drivers ICs
ManufacturerSEMTECH
PackagingQFN-20-EP(3x3)
Output Voltage2.5V~5.25V
Frequency - Switching250kHz
FeaturesOver Voltage Protection;Short Circuit Protection;LED open-circuit protection;Over-Temperature Protection (OTP)
Switch Tube (Built-In/External)-
Operating temperature-40℃~+85℃
Voltage - Input(AC)-
Number of Channels5
TopologyCharge Pump
TypeDC-DC
Output Current25mA;400mA
Voltage - Input(DC)3V~5.5V
Constant Current Accuracy1.5%
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Introduction

AI Translation

This device is a high-efficiency charge pump LED driver optimized for single-cell lithium-ion battery applications. The charge pump works in conjunction with four matched current sources to supply backlight current; a dedicated flash drive current source can also provide continuous or burst current for flash LEDs. Load and supply conditions determine whether the charge pump operates in 1x, 1.5x, or 2x mode. An optional ramp function is available to gradually adjust backlight current, simplifying control software. A flash timeout feature disables the flash if it remains active for more than 1 second. The device also provides two low-dropout, low-noise linear regulators for powering camera modules or other peripheral circuits. The device uses an I²C-compatible serial interface that controls all device functions, including backlight and flash currents as well as the two LDO voltage outputs. The flash/torch output can be triggered via the I²C interface or a dedicated pin. In sleep mode, the device reduces quiescent current to 100μA while continuing to monitor the serial interface. Both LDOs can be enabled while the device is in sleep mode. In shutdown mode, total current drops to 0.1μA.

Features

AI Translation
  • Input supply voltage range: 3.0V to 5.5V
  • Charge pump modes: 1×, 1.5×, and 2×
  • Four programmable current sources with 32 steps from 0.5mA to 25mA
  • Two programmable 200mA low-noise LDO regulators
  • Charge pump frequency: 250kHz
  • I²C-compatible interface up to 400kHz
  • Backlight current accuracy: ±1.5% (typical)
  • Backlight current matching: ±0.5% (typical)
  • Programmable main backlight fade-in/fade-out
  • External flash control pin for camera synchronization
  • Auto sleep mode (LED off): I0 = 100μA
  • Low shutdown current: 0.1μA (typical)
  • Ultra-thin package: 3mm × 3mm × 0.6mm
  • Lead-free and halogen-free

Applications

AI Translation
  • Mobile phone backlight and flash
  • PDA backlight and flash
  • Camera I/O and core power supply