SH3100IMTR SEMTECH [Semtech Corporation], SH3100IMTR Datasheet - Page 12

• Manufacturer Part Number: SH3100IMTR
• Description: Supervisory IC with I2C Interface and PWM
• Manufacturer: SEMTECH [Semtech Corporation]

© 2006 Semtech Corp.
POWER MANAGEMENT
Operating Modes
Mode
7
8
9
LDO
NO
NO
NO
Switching
Regulator
(continued)
YES
YES
YES
Control
Fan
NO
NO
NO
Duration
Reset
NO
NO
NO
Normal boost regulation from VDD to VBAK with external
switching FET and transfer diode. Operation is as mode six
but regulator feedback is determined by the internal VBAK
divider
Buck regulation from VDD to a separate supply with external
switching FET and transfer diode. Regulator feedback is input
on the SNSE pin. The PWM pin drives an external PMOS
or PNP switching the inductor to VDD and is Low during the
inductor energize period and High during the transfer period
(to allow current to fl ow through the external diode)
Buck regulation from VDD to VBAK with external switching
FET and transfer diode. Operation is as mode 8 but regulator
feedback is determined by the internal VBAK divider
12
Notes
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SH3100