ISSUED DATE :2004/02/10
REVISED DATE :2004/11/23C
GTM
CORPORATION
Application Information
Step-Up Converter
Test
Line Regulation
Load Regulation
Output Ripple
Efficiency
Conditions
Vin= 8V to 16V, Io = 175mA
Vin = 12V, Io = 75mA to 175 mA
Vin = 12V,Io = 175mA
Vin = 12V, Io = 175mA
Results
30mV = ± 0.05%
10mV = ± 0.017%
400mVp-p
87.7%
Output Ripple With Optional Filter Vin = 12V, Io = 175mA
40mVp-p
External Current Boost Connections for Ic Peak Greater than 1.5A
External NPN Switch
External NPN Saturated Switch (NOTE)
NOTE ΚIf the switch is driven into hard saturation (non-Darlington configuration) at low switch currents (≤ 300mA) and high driver currents (≥ 30mA)Δit may
take up to 2.0 us to come out of saturation. This condition will shorten the off time at frequencies ≥ 30kHz, and is magnified at high temperatures. This
condition does not occur with a Darlington configuration, since the output switch cannot saturate. If a non-Darlington configuration is used, the
following output drive condition is recommended.
GP34063
Page: 4/6
GTM [ GTM CORPORATION ]
