TI LM8801TMX-2.9/NOPB

The LM8801 step-down DC-DC converter is optimized for powering ultra-low voltage circuits from a single Li-Ion cell and input voltage rails from 2.3V to 5.5V. It provides up to 600 mA load current over the entire input voltage range. The LM8801 has a mode-control pin that allows the user to select continuous PWM operation over the complete load range or an auto PFM-PWM mode that changes modes automatically depending on the load. During PWM mode, the device operates at a fixed frequency of 6 MHz (typ.). In Auto PFM-PWM mode, hysteretic PFM extends the battery life through reduction of the quiescent current during light loads and system standby. The LM8801 is available in a 6-bump DSBGA package. Only three compact external surface-mount components, an inductor and two capacitors, are required.

• Over 90% Efficiency at 6 MHz Operation
• 600 mA Maximum Load Capability
• 6 MHz PWM Fixed Switching Frequency (typ.)
• 27 μa (typ.) Quiescent Current in PFM Mode
• Wide Input Voltage Range: 2.3V to 5.5V
• VOUT = 1.0V to 2.9V with 50 mv steps
• ±1.5% DC Output Voltage Precision Over Temperature
• Best-in-Class Load Transient Response
• Low Output Ripple in PFM Mode
• Automatic PFM/PWM Mode Switching
• Current Overload and Thermal Shutdown Protection
• Internal Soft-Start
• 6-bump DSBGA Package
• Total Solution Size <7 mm² (works with 0402 capacitors)
• UVLO

• Mobile Phones
• MP3 players
• Wireless LAN
• PDAs, Pocket PCs Portable Hard Disk Drives