ADM8832 Analog Devices, ADM8832 Datasheet
ADM8832
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ADM8832 Summary of contents
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... Handheld instruments TFT LCD panels Cellular phones GENERAL DESCRIPTION The ADM8832 is a charge pump regulator used for color thin film transistor (TFT) liquid crystal displays (LCD). Using charge pump technology, the device can be used to generate three output voltages (+5.1 V ±2%, +15.3 V, −10.2 V) from a single 3 V input supply ...
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... ADM8832 TABLE OF CONTENTS Specifications..................................................................................... 3 Timing Specifications .................................................................. 4 Absolute Maximum Ratings............................................................ 5 Thermal Characteristics .............................................................. 5 ESD Caution.................................................................................. 5 Pin Configuration and Function Descriptions............................. 6 Typical Performance Characteristics ............................................. 7 REVISION HISTORY 4/04—Changed from Rev Rev. A Changes to Outline Dimensions................................................... 11 Updated Ordering Guide............................................................... 11 7/03—Revision 0: Initial Version Theory of Operation ...................................................................... 10 Scanning and Blanking.............................................................. 10 Power Sequencing ...
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... Scanning Period Blanking Period I = –100 µA L Relative to 5.1 V Output 100 µA (Scanning) L Relative to 5.1 V Output µA (Blanking) L Scanning Period SHDN Low = Shutdown Mode SHDN High = Normal Mode Low = BLANK Period High = SCAN Period Low = External LDO High = Internal LDO ADM8832 ...
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... ADM8832 Parameter CLKIN Minimum Frequency Input Voltage Digital Input Current 1 Digital Input Capacitance 1 Guaranteed by design. Not 100% production tested. Specifications are subject to change without notice. TIMING SPECIFICATIONS –40°C to +85°C, unless otherwise noted; C1, C5, C6 2.2 µF, C2, C3, C4, C8 µF, CLKIN = 1 kHz in ...
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... V to +0.3 V other conditions above those listed in the operational sections −0 + this specification is not implied. Exposure to absolute −40°C to +85°C maximum rating conditions for extended periods may affect 3.55 W device reliability. −65°C to +150°C Class I Rev Page ADM8832 ...
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... Drive Mode Input CMOS logic. A logic high places the part in scan (high current) mode, and the charge pump is driven by the internal oscillator. A logic low places the part in blanking (low current) mode, and the charge pump is driven by the (slower) external oscillator. This is a power saving feature on the ADM8832. 9 CLKIN External CLOCK Input ...
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... Figure 6. LDO Efficiency in Scanning Mode with OUTPUT CURRENT ( µ A) Figure 7. +15 V/−10 V Efficiency vs. Output Current in Blanking Mode OUTPUT CURRENT ( µ A) Figure 8. +15 V/−10 V Efficiency vs. Output Current in Scanning Mode ADM8832 100 ...
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... ADM8832 5.30 5.25 5.20 DEVICE 1 @ +85°C 5.15 DEVICE 1 @ +25°C 5.10 5.05 5.00 4.95 4.90 2.6 2.7 2.8 2.9 3.0 3.1 3.2 V (V) CC Figure 9. LDO Variation over Supply and Temperature 300 250 200 ICC (SCAN) 150 100 ICC (BLANK 2.6 2.7 2.8 2.9 3.0 3.1 3.2 V (V) CC Figure 10. Supply Current vs. Voltage TEK STOP: 2.50MS/s 23 ACQS [ T V OUT OUTPUT RIPPLE RIPPLE ...
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... T 1 –10V OUTPUT T T 5VOUT 2 CH1 5.00V CH2 5.00V M10.0ms CH1 CH3 5.00V Figure 15. +15 V and −10 V Outputs at Power-Down (Unloaded) 20.1 20.0 19.9 19.8 19.7 19.6 19.5 19.4 –40 –20 0V Figure 16. Power Dissipation over Temperature, V Rev Page ADM8832 TEMPERATURE (°C) = 3.6 V, Scanning Mode CC with All O/Ps at Maximum Load ...
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... V supply for the TFT panel to power on correctly. The ADM8832 controls this sequence. When the device is turned on (a logic high on SHDN ), the ADM8832 allows the −10 V output to ramp immediately, but holds off the +15 V output. It continues to do this until the negative output reaches − ...
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... Temperature Range ADM8832ACP −40°C to +85°C ADM8832ACP-REEL −40°C to +85°C ADM8832ACP-REEL7 −40°C to +85°C 1 ADM8832ACPZ −40°C to +85°C 1 ADM8832ACPZ-REEL −40°C to +85°C 1 ADM8832ACPZ-REEL7 −40°C to +85° Pb-free part. 0.60 4.00 MAX BSC SQ 0.60 MAX TOP 3.75 VIEW BCS SQ ...
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... ADM8832 NOTES © 2004 Analog Devices, Inc. All rights reserved. Trademarks and registered trademarks are the property of their respective owners. C03759–0–5/04(A) Rev Page ...