XC9509 series

Synchronous DC/DC with Built-in VR and VD

  • XC9509 - VR input from Vin

The XC9509 series is a family of synchronous rectification type DC/DC converters with a built in high speed, low noise, LDO voltage regulator and an internal comparator for low voltage detection. The internal 0.6 Ohm P-channel driver transistor and N-channel switching transistor mean that efficiencies over 90% can be achieved without needing an external Schottky diode. The XC9509 series is designed for use with ceramic capacitors and small chip style inductors, making it ideal for space conscious applications. The XC9509 is available in MSOP-10 and USP-10 (chip-scale) packages.

Features:

  • Input Voltage: 2.0V ~ 6.0V
  • Output Voltage: 0.9V ~ 4.0V (0.1V steps)
  • Switching Frequency: 300kHz, 600kHz or 1.2MHz
  • Output Current: DC/DC 600mA, VR 300mA
  • VR Dropout Voltage: 300mV @ 300mA (typ)
  • VD Function: N-Ch open Drain
  • PWM or PWM/PFM auto-switch control, selectable via MODE pin.
  • Compatible with Low ESR Ceramic Capacitors
  • Built-in current limit and internal soft start circuit (set to 10ms)
  • Under Voltage Lock Out Circuit

Packages: MSOP-10 , USP-10

PropertyXC9509XC9509XC9509
TypeStep-DownStep-DownStep-Down
ControlSynchronous PWM or PFM/PWMSynchronous PWM or PFM/PWMSynchronous PWM or PFM/PWM
MOSFETInternalInternalInternal
Typical Efficiency (%)949494
Min Operating Voltage (V)2.42.42.4
Max Operating Voltage (V)666
Min Output Voltage (V)0.90.90.9
Max Output Voltage (V)444
Accuracy (%)222
Min Switching Frequency (kHz)3006001200
Max Switching Frequency (kHz)3006001200
Built-In Voltage DetectorYesYesYes
Built-In Voltage RegulatorYesYesYes
Max Output Current (mA)600600600
Quiescent Current (uA)N/AN/AN/A
PackagesMSOP-10, USP-10MSOP-10, USP-10MSOP-10, USP-10