bl8530c
high efficiency, low supply current, multi-funtion step-up dc/dc controller
outline：
the bl8530c series are cmos-based pfm step-up dc-dc controller with low supply current and high output voltage accuracy. quiescent current drawn from power source is as low as 6ua. it is capable of delivering 500ma output current at 4.0v output with 2v input voltage. only four external components are necessary: an inductor, a schottky diode, an output filter capacitor and a nmosfet or a
npn transistor all of these features make bl8530c series be suitable for the portable devices, which are supplied by a single battery to four-cell batteries.
bl8530c has a drive pin (ext) for external transistor. so it is possible to load a
large output current with a power transistor which has a low saturation voltage.
bl8530c integrates stable reference circuits and trimming technology, so it can
afford high precision and low temperature-drift coefficient of the output voltage.
bl8530c is available in sot-23-3 and sot-23-5 packages which are pb free. and in sot-23-5 the device can be switch on or off easily by ce pin, to minimize the standby
supply current.
features：
. deliver 500ma at 4.0v output voltage with 2v input voltage
. the converter output voltage can be adjusted from 2.5v～6.0v(in 0.1v step)
. output voltage accuracy -----------±2％
. low temperature-drift coefficient of the output voltage------------------±100ppm/℃
. only four external components are necessary: an inductor, a schottky diode,
an output filter capacitor and a nmosfet or a npn transistor
. high power conversion efficiency---90％
. low quiescent current drawn from power source----------------------------------------- 6ua
. small package----- sot-23-3、sot-23-5
applications：
. power source for pda、dsc、mp3 player、electronic toy and wireless mouse
. power source for a single or dual-cell battery-powered equipments
. power source for led
package type：
rn：sot-23-5
rm：sot-23-3
function description：
1：without enable circuit
2：with enable circuit
output voltage：
25..2.5v
30..3.0v
..
60 .. 6.0v (in 0.1v
step)