MB3800 Fujitsu Microelectronics, Inc., MB3800 Datasheet
MB3800
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MB3800 Summary of contents
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... Voltage) MB3800 DESCRIPTION The MB3800 is a single-channel switching regulator control IC for low voltage applications incorporating a soft start function and short circuit detection function. The device has a low minimum operating voltage of 1.8 V and is ideal for the power supply of battery-operated electronic equipment. ...
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... MB3800 PIN ASSIGNMENT –IN SCP V CC BR/CTL PIN DESCRIPTION Pin No. Symbol I/O 1 –IN 2 SCP — 3 VCC — 4 BR/CTL 5 OUT 6 GND — 7 OSC — (TOP VIEW (FPT-8P-M01) (FPT-8P-M02) (FPT-8P-M03) Description I Error amplifier inverting input pin Soft start and SCP setting capacitor connection pin ...
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... BLOCK DIAGRAM Reference 0.6 V– voltage supply 0.1 V– 1.25 V –IN – Error Amp. 0.5 V 500 FB 8 Soft start SCP 6 GND OSC 7 Sawtooth wave oscillator 0.1 V PWM – Comp. + Output drive + control circuit + 0.3 V DTC 0 SCP BR/CTL MB3800 OUT pin) 3 ...
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... MB3800 ABSOLUTE MAXIMUM RATINGS Parameter Symbol Power supply voltage V Output source current I Output sink current I Allowable dissipation P Operating temperature T Storage temperature When mounted square double-sided epoxy board WARNING: Semiconductor devices can be permanently damaged by application of stress (voltage, current, temperature, etc.) in excess of absolute maximum ratings. Do not exceed these ratings. ...
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... — — – 0. – 3 270 DUTY MB3800 ( + Value Unit Min. Typ. Max. — — 0.9 V 1.1 1.3 1.5 V –1.5 –1.0 –0.7 A 0.7 0.8 0.9 V –1.5 –1.0 –0.7 A 0.7 0.8 0.9 V 400 ...
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... MB3800 (Continued) Parameter Output voltage Output section Output source current Output sink current Pull down resistance Pin voltage Output current Input off condition setting section/ Input on condition Control section Pin current range Stand-by current Entire device Average supply current DIAGRAM FB pin voltage ...
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... When the voltage at the SCP pin reaches approximately 0.8V, the output PE pin is set low and the SCP pin stays low. Once the protection circuit operates, the circuit can be restored by resetting the power supply. • Short circuit detection time t [s] 0 MB3800 7 ...
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... MB3800 TYPICAL CHARACTERISTICS Supply voltage vs. Supply current Supply voltage V CC Supply voltage vs. Input threshold voltage 1.0 0.8 0.6 0.4 0 1.0 2.0 3.0 Supply voltage V CC High level output 2.0 1.6 1.2 0.8 0 –10 –20 –30 High level output current I 8 Supply voltage vs. Input threshold voltage ...
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... A) Ambient temperature vs. Frequency variation ratio 10 = 270 3 + –5 –10 – –40 –20 (V) MB3800 + –0.4 –0.8 –1.2 –1.6 –2.0 BR/CTL pin current I (mA + 100 1000 pF = 10000 pF ...
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... Output pin voltage and current waveforms (reference data 200 ns 0 0.4 0.8 1.2 1.6 Note: The OFF delay time of V depends on the OUT characteristics of the external transistor. Measurement circuit diagram MB3800 5 I OUT OUT 4 390 270 1 2 – ...
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... ON/OFF current can be set by a resistor connected to the BR/CTL pin (pin 4). 2. Power Supply Control Function Stand-by mode (supply current less) can be set by connecting the BR/CTL pin (pin the pin open circuit. SW Mode OFF Stand-by mode ON Operating mode MB3800 4 BR/CTL RB SW MB3800 or by making CC 11 ...
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... APPLICATION EXAMPLE 0 CTL 12 to the SCP pin (pin 2). Soft start prevents a current spike – SCP OSC 2 7 MB3800 V GND BR/CTL OUT 4 5 390 270 pF + and capacitor C starts charging ...
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... After mounting the device on a printed circuit board, store or transport the board in a conductive bag or container. • Earth work benches, tools, and measuring equipment. • Ensure that maintenance personnel have a resistance of 250 series between their body and earth. MB3800 13 ...
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... MB3800 ORDERING INFORMATION Part number MB3800PF MB3800PNF MB3800PFV 14 Package 8-pin Plastic SOP (FPT-8P-M01) 8-pin Plastic SOL (FPT-8P-M02) 8-pin Plastic SSOP (FPT-8P-M03) Remarks ...
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... FUJITSU LIMITED F08002S-4C-4 C 2.25(.089)MAX 0.05(.002)MIN (STAND OFF) 5.30±0.30 7.80±0.40 (.209±.012) (.307±.016) 0.15 Ø0.13(.005) M .006 Details of "A" part MB3800 +0.40 6.80 –0.20 +.016 .268 –.008 +0.05 0.50±0.20 –0.02 +.002 (.020±.008) –.001 0.20(.008) 0.50(.020) 0.18(.007)MAX ...
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... MB3800 (Continued) 8-pin Plastic SOL (FPT-8P-M02) +0.25 +.010 5.05 .199 –0.20 –.008 1.27(.050)TYP "A" 3.81(.150)REF 1994 FUJITSU LIMITED F08004S-2C 3.90±0.30 6.00±0.40 (.154±.012) (.236±.016) 45° 0.40(.016) 0.42±0.10 Ø0.13(.005) M (.017±.004) 0.10(.004) 1.55±0.20(.061±.008) 0.15± ...
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... NOM "A" +0.05 0.15 –0.02 0.10(.004) M +.002 .006 –.001 MB3800 0.10(.004) 6.20±0.20 (.244±.008) Details of "A" part 0.10±0.10(.004±.004) (STAND OFF) 0 10° 0.50±0.20 (.020±.008) Dimensions in mm (inches). 17 ...
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... MB3800 FUJITSU LIMITED All Rights Reserved. The contents of this document are subject to change without notice. Customers are advised to consult with FUJITSU sales representatives before ordering. The information and circuit diagrams in this document are presented as examples of semiconductor device applications, and are not intended to be incorporated in devices for actual use. Also, ...