Sharp LC-32SH25E, Service Manual

Page: 45 / 113

2008-03-14
LC-32SH25E
45
programed should have page in the erased state first)
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Status Register Feature
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Electronic Identification
- JEDEC 1-byte manufacturer ID and 2-byte device ID
- RES command for 1-byte Device ID
- Both REMS and REMS2 commands for 1-byte manufacturer ID and 1-byte device ID
HARDWARE FEATURES
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SCLK Input
- Serial clock input
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SI Input
- Serial Data Input
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SO Output
- Serial Data Output
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WP#/ACC pin
- Hardware write protection and program/erase acceleration
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HOLD# pin
- pause the chip without diselecting the chip
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PACKAGE
- 16-pin SOP (300mil)
- 8-land WSON (8x6mm or6x5mm)
- 8-pin SOP (200mil, 150mil)
- 8-pin PDIP (300mil)
- All Pb-free devices are RoHS Compliant
1.8. U155 (IC TPS5430DDAR SO-8(DDA))
FEATURES
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Wide Input Voltage Range:
– TPS5430: 5.5 V to 36 V
– TPS5431: 5.5 V to 23 V
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Up to 3-A Continuous (4-A Peak) Output Current
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High Efficiency up to 95% Enabled by 110-m
Ω
Integrated MOSFET Switch
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Wide Output Voltage Range: Adjustable Down to 1.22 V with 1.5% Initial Accuracy
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Internal Compensation Minimizes External Parts Count
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Fixed 500 kHz Switching Frequency for Small Filter Size
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Improved Line Regulation and Transient Response by Input Voltage Feed Forward
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System Protected by Over Current Limiting and Thermal Shutdown
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–40°C to 125°C Operating Junction Temperature Range
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Available in Small Thermally Enhanced 8-Pin SOIC PowerPAD™ Package
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For SWIFT Documentation, Application Notes and Design Software, See the TI Website at www.ti.com/swift
DESCRIPTION
As a member of the SWIFT™ family of DC/DC regulators, the TPS5430/TPS5431 is a high-output-current PWM converter that integrates a low resistance
high side N-channel MOSFET. Included on the substrate with the listed features are a high performance voltage error amplifier that provides tight voltage
regulation accuracy under transient conditions; an undervoltage-lockout circuit to prevent start-up until the input voltage reaches 5.5 V; an internally set
slow-start circuit to limit inrush currents; and a voltage feed-forward circuit to improve the transient response. Using the ENA pin, shutdown supply current
is reduced to 18 mA typically. Other features include an active-high enable, over-current protection, and thermal shutdown. To reduce design complexity
and external component count, the TPS5430/TPS5431 feedback loop is internally compensated. The TPS5431 is intended to operate from power rails up
to 23 V. The TPS5430 regulates a wide variety of power sources including 24-V bus.
The TPS5430/TPS5431 device is available in a thermally enhanced, easy to use 8-pin SOIC PowerPAD™ package. TI provides evaluation modules and
the SWIFT™ Designer software tool to aid in quickly achieving high-performance power supply designs to meet aggressive equipment development cycles.
1.9. U605 (IC MT8292 QFN-48)