BA9700AFV

BA9700A / BA9700AF / BA9700AFV Regulator ICs Switching regulator for DC / DC Converters BA9700A / BA9700AF / BA9700AFV The BA9700A, BA9700AF and BA9700AFV are switching regulators that use a pulse width modulation (PWM) system. They use a transistor switch to stabilize the output voltage. By the use of the transistor, power loss is decreased, fluctuation efficiency is improved, and the circuit is made more compact and single. !Features 1) Output voltage can step up, step down, or invert at an arbitrary level. 2) Low current consumption. (typically 1.7mA) 3) Wide oscillation frequency range. (typically 2.8k ~ 470kHz) 4) Built-in reference voltage current. (typically 2.57V) 5) Operates at low voltage. (minimally 3.55V) !Block diagram NON INVERT INPUT 14 1/2 Vref 13 INVERT INPUT 12 Vref 11 6) Dead time controller restricts operation when overloaded. 7) Power switch can isolate all circuits in the IC. 8) Best suited for battery operated equipment. 9) Compact 14-pin SSOP package (BA9700AFV). POWER SW 10 N. C. 9 VCC 8 + − Error Amp 30k 30k Vref Voltage Regulator BA9700A BA9700AF PWM Comparator Triangle Oscillator 1 D - TIME CONT 2 RT 3 CT 4 FEED BACK 5 OUT 6 N. C. 7 GND !Absolute maximum ratings (Ta = 25°C) Parameter Power supply voltage Symbol VCC Limits 24 600 *1 350 *2 350 *3 Unit V BA9700A Power dissipation BA9700AF BA9700AFV Pd mW Operating temperature Storage temperature Topr Tstg -20~+80 -55~+150 °C °C *1 BA9700A: Reduced by 4.8 mW for each incr...