ELM93xxxB
CMOS High efficiency PFM step-up DC/DC converter
■Pin configuration
SOT-89 (TOP VIEW)
SOT-23 (TOP VIEW)
Pin No.
1
2
3
Pin name
VSS
VOUT
LX
Pin No.
1
2
3
Pin name
VSS
LX
VOUT
■Standard circuit
Cin : The circuit can operate without Cin, but adding Cin to the circuit can lower the feed-
back noise to the Input; this method is also effective in improving efficiency because
input voltage drop during switching can be eased. Under the condition of Iout≤10mA,
please connect tantalum capacitor of 10μF to 47μF to a coil as close as possible.
■Block diagram
8-2