• 8-Channel DC/DC Converter and Low Dropout (LDO)
• Integrated Power MOSFET Switch Except CH8
  • Boost (CH5/7)
  • Buck (CH1/3)
  • Buck-Boost (CH2/4)
  • Invert (CH6)
• Low-Power Suspend Mode (Sleep Mode)
• Power ON/OFF Sequence (CH1/2/3 and CH5/6)
• LED-Back Light Brightness Control (CH7)
• Fixed Switching Frequency (CH1–4: 1.5 MHz, CH5–8: 750 kHz)
• Fixed Max Duty Cycle Internally
• Soft Start
• Undervoltage Lockout (UVLO)
• Protection
  • Thermal Shutdown (TSD)
  • Overvoltage Protection (OVP)
  • Overcurrent Protection (OCP) Except CH8
• Supply Voltage Range: 1.5 V to 5.5 V
• Operating Temperature Range: –25°C to 85°C
• 6 × 6 mm, 0.4-mm Pitch, 48-Pin QFN Package
• APPLICATIONS
  • Digital Still Cameras (DSCs)
  • Portable Electronics Equipment

PowerPAD is a trademark of Texas Instruments.

DESCRIPTION/ORDERING INFORMATION

The TPS65530A is a fully integrated 8-channel switching dc/dc converter, and seven channels have integrated power FET.

CH2/4 are configured for H bridge for buck-boost topology and single inductor supports. These channels achieve higher efficiency in spite of input/output voltage conditions.

CH7 has a brightness control and drives white LED by constant current. Also, CH7 supports overvoltage protection (OVP) for open load.

CH1/2/3 have a power ON/OFF sequence suitable for a digital still camera (DSC) system. CH5/6 have a power ON/OFF sequence, depending on the CCD. Power ON/OFF for CCD block (CH5/6) is selectable by the input voltage level at the SEQ56 pin. CH4 and CH7 have individual ON/OFF sequences.

The TPS65530A high switching frequency is achieved by an integrated power MOSFET switch. It reduces external parts dynamically. Shutdown current consumption is less than 1 µA as a typical value.