11 s-8323/8327 series features consisting of a reference voltage source, an oscillation cir- cuit, a power mosfet and an error amplifier, this series of devices offer high efficiency over a wide range because the control circuit has the ability to change the duty ratio between 0% and 83% according to the load. a step-up switching regulator can be constructed by exter- nally connecting only a coil, a capacitor and a diode to the s-8323 series. these features, along with its small package and low current consumptions, make the s-8323 series ideal as a power supply for portable equipment requiring low noise. for applications requiring a high output current, the s-8327 series is also available with an external transistor. for making an external coil smaller, high frequency type (250khz) is also available. ? low voltage operation : 0.9v(iout=1ma) : 1.4v(h,j series) ? low current consumption operation : 17.2 m a typ.(volt=3v, 50khz) : 59.4 m a typ.(s-8327h33) shutdown : 0.5 m a max. ? duty ratio : built-in pwm controlled circuit ? external components : coil, diode, capacitors ? output voltage : accurate to 2.4% ? oscillation frequency : 30khz, 50khz, 100khz, 250khz ? built-in soft start function ? shutdown function ? large output currents can be obtained with an external transistor (s-8327 series) ? small package : sot-23-5, sot-23-3, sot-89-3 ? step-down and inverting type can be also made. applications ? power supplies for portable equipment such as pagers, handy calculators, and remote controllers ? constant voltage power supplies for cameras, video equipment, and communications equipment ? power supply for microcomputers pin configurations small-package pwm control step-up switching regulator selection guide shutdown pin "h" : nomal operation (stepping up operation) "l" : stop stepping up (whole circuit stop) 1 2 5 v out cont ext on / off pin no. pin name functions output voltage pin and power supply pin n.c. (non connection) gnd pin external inductor connection pin (for s-8323 series) external transistor connection pin (for s-8327 series) 3 - 4 v ss external inductor connection pin (for s-8323 series) external transistor connection pin (for s-8327 series) output voltage pin power supply pin n.c. (non connection) gnd pin v out v dd - v ss 1 2 3 4 cont ext 5 pin no. pin name functions 2 3 v out cont ext pin no. pin name functions output voltage pin and power supply pin external inductor connection pin (for s-8323 series) external transistor connection pin (for s-8327 series) gnd pin 1 v ss s-8323axxmc s-8323axxma s-8323axxua with a shutdown function without shutdown function without shutdown function s-8323dxxmc for variable output voltage by step-up dc/dc converter and step-down, inverted output dc/dc converter with an external resister for variable output voltage by step-up dc/dc converter and step-down, inverted output dc/dc converter with an external resister s-8323cxxma for pagers s-8327bxxmc s-8327bxxma s-8327bxxua s-8327exxmc s-8323hxxmc s-8323jxxmc s-8327hxxmc s-8327jxxmc for large load current with shutdown function for large load current without shutdown function for large load current without shutdown function for variable output voltage by step-up dc/dc converter with an external resister for making external parts smaller with a shutdown function for large load current without shutdown function for variable output voltage by step-up dc/dc converter with an external resister - - - - - - - - 50 50 50 50 30 100 100 100 100 250 250 250 250 sot-23-5 sot-23-3 sot-89-3 sot-23-5 sot-23-3 sot-23-5 sot-23-3 sot-89-3 sot-23-5 sot-23-5 sot-23-5 sot-23-5 sot-23-5 product name built in power transistor with external power trasistor switching frequency(khz) shutdown function v dd /v out separate type package application - - - - - - - - - - - - - - - - - - - - - - - - top view 54 13 2 sot-23-5 1 3 2 top view sot-23-3 top view sot-89-3 13 2 s-8323axxmc/s-8327bxxmc/s-8323hxxmc/s-8327hxxmc sot-23-5 s-8323axxma/s-8323axxua/s-8323cxxma s-8327bxxma/s-8327bxxua sot-23-3, sot-89-3 s-8323dxxmc/s-8327exxmc/s-8323jxxmc/s-8327jxxmc sot-23-5
12 power supply product list item output voltage (v) 2.0 2.5 2.7 3.0 3.3 5.0 5.2 - s-8323a25mc-elf-t2 s-8323a27mc-elh-t2 s-8323a30mc-elk-t2 s-8323a33mc-eln-t2 s-8323a50mc-eme-t2 S-8323A52MC-EMG-T2 - s-8323a25ma-elf-t2 s-8323a27ma-elh-t2 s-8323a30ma-elk-t2 s-8323a33ma-eln-t2 s-8323a50ma-eme-t2 - - s-8323a25ua-elf-t2 s-8323a27ua-elh-t2 s-8323a30ua-elk-t2 s-8323a33ua-eln-t2 s-8323a50ua-eme-t2 - - s-8323c25ma-enf-t2 s-8323c27ma-enh-t2 s-8323c30ma-enk-t2 - - - s-8323d20mc-eza-t2 - - s-8323d30mc-ezk-t2 - s-8323d50mc-e3e-t2 - - - - - - - - s-8323j20mc-fqa-t2 - - - - - - s-8323axxmc series s-8323axxma series s-8323axxua series s-8323cxxma series s-8323dxxmc series s-8323hxxmc series s-8323jxxmc series 2.0 2.5 2.7 2.8 3.0 3.3 3.6 5.0 5.4 - s-8327b25mc-erf-t2 s-8327b27mc-erh-t2 s-8327b28mc-eri-t2 s-8327b30mc-erk-t2 s-8327b33mc-ern-t2 s-8327b36mc-erq-t2 s-8327b50mc-ese-t2 s-8327b54mc-esi-t2 - s-8327b25ma-erf-t2 s-8327b27ma-erh-t2 - s-8327b30ma-erk-t2 s-8327b33ma-ern-t2 - s-8327b50ma-ese-t2 - - s-8327b25ua-erf-t2 s-8327b27ua-erh-t2 s-8327b30ua-erk-t2 s-8327b33ua-ern-t2 - s-8327b50ua-ese-t2 - s-8327e20mc-eva-t2 - - - - - - s-8327e50mc-eke-t2 - item output voltage (v) s-8327bxxmc series s-8327bxxma series s-8327bxxua series s-8327exxmc series - - - - - s-8327h33mc-fwn-t2 - s-8327h50mc-fxe-t2 - s-8327hxxmc series - - - - - - - - - s-8327jxxmc series block diagram v out v ss + - c in v in l sd cont on/off + - + - c out vref soft start circuit pwm control circuit please ask an sii representative if you need another output voltage product. (1) s-8323axxmc, s-8323hxxmc (3) s-8323axxma, s-8323axxua, s-8323cxxma (2) s-8327bxxmc, s-8327hxxmc (4) s-8327bxxma, s-8327bxxua (6) s-8327exxmc, s-8327jxxmc (output voltage adjustment circuit with external resistors) (5) s-8323dxxmc, s-8323jxxmc (output voltage adjustment circuit with external resistors) v out v ss pwm control circuit + - c in v in l sd ext on/off + - + - c out 2200pf 1k w vref soft start circuit v out v ss + - c in v in l sd cont + - + - c out vref pwm control circuit soft start circuit v out v out v ss pwm control circuit vref + - c in v in l sd ext + - soft start circuit + - c out 2200pf 1k w v dd v cc v out r 1 r 2 v ss pwm control circuit vref + - c in v in l sd cont r a r b + - soft start circuit + - c out c c v dd v cc v out r 1 r 2 v ss pwm control circuit vref sd r a r b + - soft start circuit + - c out c c + - c in v in l ext 2200pf 1k w
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