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MB3827, MB3828PFV, MB3829

Table of contents:
Info of MB3827
Info of MB3828PFV
Info of MB3829

MB3827, MB3828PFV, MB3829 Selling Leads, Datasheet

MFG:FUJ Package Cooled:QFP D/C:98

MB3827, MB3828PFV, MB3829 Datasheet download

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Part Number: MB3827

MFG: FUJ

Package Cooled: QFP

D/C: 98

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MB3827 General Description

The MB3827 is a pulse width modulation (PWM) type 6-channel DC/DC converter IC with, synchronous rectification for voltage step-up and step-down. The MB3827 is ideal for low voltage, high efficiency, compact applications and for down conversion and up/down conversion (with two types of voltage step-up/step-down methods allowing input/output relations to be set independently).

In addition the MB3827 features a built-in self-supply power channel (channel 7) providing a wide range of supply voltages, and operates from two dry-cell batteries.

This product is ideal for high performance portable devices such as digital still cameras.

MB3827 Maximum Ratings

Parameter	Symbol	Conditions	Rating		Unit
Parameter	Symbol	Conditions	Min.	Max.	Unit
Power supply voltage	V_CC	-	-	17	V
Power supply voltage	V_G	-	-	17	V
Output current	I_o	OUT pin	-	20	mA
Peak output current	I_o	OUT pin, Duty 5%	-	200	mA
Power dissipation	P_D	Ta +25°C	-	1000*	mW
Storage temperature	T_stg	-	55	+125	°C

* : The packages are mounted on the dual-sided epoxy board (10 cm ´ 10 cm).
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.

MB3827 Features

• Compatible with step-up/step-down switching methods (channel 1)
• Compatible with step-up/step-down Zeta methods (channels 2 to 6)
• Synchronous rectification (channels 1 and 2)
• Low start-up voltage : 1.8 V (channel 7 for self-power supply)
• Power supply voltage range : 4 V to 13 V (channels 1 to 6)
• Built-in high-precision reference voltage generator : 2.5 V±1%
• Oscillator frequency range : 100 kHz to 800 kHz
• Error amplifier output for soft start (channels 1 to 6)

MB3827 Connection Diagram

MB3829 General Description

This power supply IC incorporates a 4-channel series regulator and a battery backup function. It is a multi - function power supply IC with an output control function and momentary power- loss detection circuit, which are both required for mobile telephones. It also incorporates a speaker amplifier and a buzzer driver. Since it has a built - in power system suitable for mobile telephones, it promises equipment downsizing.

MB3829 Maximum Ratings

Parameter		Symbol	Conditions	Value	Unit
SCommon to all	Power-supply voltage	V_CC		10	V
SCommon to all	Power dissipation	P_D	T_A +25°C	860*	mW
sections	Storage temperature	T_stg		-50 to +125	°C
Power supply control	Output current	I_O1 to I_O3		-60	mA
section		I_O4		-12	mA
Speaker amplifier	Output current	I_O		150	mA
section
Sounder section	Output current	I_O1	Duty = 50%	240	mA
		I_O2	Duty = 50%	120	mA
		I_O3	Duty = 50%	60	mA
Voltage monitoring	Reset output current	I_OL, I_OH	DC	-10 to 10	mA
section	Reset output current	I_OL, I_OH	DC	-10 to 10	mA

*: Value as mounted on double-sided epoxy board 10 *10 cm
NOTE: Permanent device damage may occur if the above Absolute Maximum Ratings are exceeded. Functional operation should be
restricted to the conditions as detailed in the operational sections of this data sheet. Exposure to absolute maximum rating conditions
for extended periods may affect device reliability.

MB3829 Features

Power consumption during standby       : 0.22 mW (typ.)
4-channel low- saturation voltage type : 6 typ. for channels 1-3
series regulator                                       20 typ. for channel 4
Battery backup function
Momentary power- loss and power- restoration functions
ON/OFF switch circuit with an operating error prevention function
BTL amplifier for driving the speaker    : Output power= 90 mW typ.
Buzzer driver to permit changing the sound volume : 200 mA max.
Power supply voltage drops are accurately detected.
Hysteresis is provided for detection voltage.
Watchdog timer stop function is provided (inhibit pin).
Watchdog monitoring time and reset time are set independently.

MB3829 Connection Diagram

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