FUJITSU SEMICONDUCTOR
DATA SHEET
DS04-27203-6E
ASSP
Switching Regulator Controller
MB3778
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DESCRIPTION
The MB3778 is a dual switching regulator control IC. It has a two-channel basic circuit that controls PWM system
switching regulator power. Complete synchronization is achieved by using the same oscillator output wave.
This IC can accept any two of the following types of output voltage: step-down, step-up, or voltage inversion
(inverting voltage can be output to only one circuit). The MB3778’s low power consumption makes it ideal for use
in portable equipment.
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FEATURES
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Wide input voltage range : 3.6 V to 18 V
Low current consumption : 1.7 mA typ. operation, 10
µA
max. stand-by
Wide oscillation frequency range:1 kHz to 500 kHz
Built-in timer latch short-circuit protection circuit
Built-in under-voltage lockout circuit
Built-in 2.46 V reference voltage circuit : 1.23 V output can be obtained from R
T
terminal
Variable dead-time provides control over total range
Built-in stand-by function: power on/off function
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PACKAGES
16-pin, Plastic DIP
16-pin, Plastic SSOP
v
16-pin, Plastic SOP
(DIP-16P-M04)
(FPT-16P-M05)
(FPT-16P-M06)
FUJITSU [ FUJITSU COMPONENT LIMITED. ]
