BA9700AF Rohm, BA9700AF Datasheet
BA9700AF
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BA9700AF Summary of contents
Page 1
... 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 ...
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... Input bias current 〈PWM comparator section〉 Threshold voltage 1 Threshold voltage 2 〈Output section〉 Output transistor leakage current Output saturation voltage 〈Total device〉 Quiescent current Standby current Operating voltage BA9700A / BA9700AF / BA9700AFV = 5.0V 10kΩ, and Symbol Min. Typ. Max. Unit V 2 ...
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... COLLECTOR Application examples V IN GND 8 2.57V Voltage 11 Regulator 30k 13 1.29V 30k R 1 43k ERROR AMP − 680p 15k 0.047µ 7 BA9700A / BA9700AF / BA9700AFV Fig.1 C 1000p R 15k 470µ 47k Triangle Oscillator V ref PWM COMPARATOR 1 C 1µ 15k R 20k 4 5 Fig.2 Step-down converter ...
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... GND 8 Voltage 2.57V 11 Regulator 30k 13 1.29V 30k R 1 39k ERROR AMP + 14 − 4. 7.5k C 680p 2 4 0.047µ 7 BA9700A / BA9700AF / BA9700AFV C 1000p R 10k 47k Triangle Oscillator V ref PWM COMPARATOR 1 C 1µ 22k R 39k 4 5 Fig.3 Inverting converter C 1000p R 10k R SW ...
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... Regulator ICs Basic application board patterns and component arrangemrnts Fig.6 Inverting converter (BA9700A) Fig.7 Step-up converter (BA9700A) BA9700A / BA9700AF / BA9700AFV C 2 BA9700A V IN GND SW + BA9700A - 1 Fig.5 Step-down converter C 2 BA9700A GND + C 2 BA9700A GND + ( ) ( ) + + OUT + GND OUT GND BA9700A - OUT GND ...
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... FREQUENCY (Hz) Fig.11 Phase and gain vs. frequency for the error amplifier BA9700A / BA9700AF / BA9700AFV 1M 100k = 20kΩ 10k 1k 100p 1000p 0.01µ 0.1µ CT (F) Fig.9 Oscillation frequency characteristic vs. triangular wave oscillator resistance (2) 10M 4.00 3 ...
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... Regulator ICs External dimensions (Units : mm) BA9700A 19.4±0 7.62 0°∼15° 2.54 0.5±0.1 DIP14 BA9700AFV 5.0±0 0.65 0.22±0.1 0.3Min. SSOP - B14 BA9700A / BA9700AF / BA9700AFV BA9700AF 8.7±0 1.27 0.4±0.1 SOP14 0.1 0.3Min. 0.15 ...