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TD9000

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<SPAN style="POSITION: relative; FONT-FAMILY: 'Arial','sans-serif'; COLOR: #4f81bd; TOP: 0.5pt; mso-bidi-font-size: 10.5pt; mso-fareast-font-family: 宋体; mso-font-kerning: 0pt; mso-text-raise: -.5pt; mso-fareast-theme-font: minor-fareast; mso-themecolor: accent1" lang=EN-US>TD9000 High-Performance PWM Controller 

<A href="http://www.techcodesemi.com/datasheet/TD9000.pdf" target=_blank>(DATASHEET)</A>

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The TD9000 is a single-phase, constant-on-time, synchronous PWM controller, which drives N-channel MOSFETs. The TD9000 steps down high voltage to generate low-voltage chipset or RAM supplies in notebook computers.
The TD9000 provides excellent transient response and accurate DC voltage output in either PFM or PWM Mode. In Pulse Frequency Mode (PFM), the TD9000 provides very high efficiency over light to heavy loads with loading- modulated switching frequencies. In PWM Mode, the converter works nearly at constant frequency for low-noise requirements.
The TD9000 is equipped with accurate positive current- limit, output under-voltage, and output over-voltage protections, perfect for NB applications. The Power-On- Reset function monitors the voltage on VCC to prevent wrong operation during power-on. The TD9000 has a 1ms digital soft-start and built-in an integrated output discharge method for soft-stop. An internal integrated soft-start ramps up the output voltage with programmable slew rate to reduce the start-up current. A soft-stop function<SPAN style="FONT-FAMILY: Arial; LETTER-SPACING: -0.1pt; FONT-SIZE: 7.5pt; mso-font-kerning: 0pt; mso-ascii-theme-font: minor-fareast; mso-hansi-theme-font: minor-fareast; mso-fareast-theme-font: minor-fareast" lang=EN-US> actively discharges the output capacitors with controlled reverse inductor current.<SPAN style="FONT-FAMILY: Arial; FONT-SIZE: 7.5pt; mso-bidi-font-family: 'Times New Roman'; mso-bidi-font-size: 11.0pt; mso-fareast-font-family: Arial; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA" lang=EN-US>The TD9000 is available in 10pin TDFN 3x3 package. 

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Features
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Adjustable Output Voltage from +0.7V to +5.5V
0.7V Reference Voltage
±1% Accuracy Over-Temperature
Operates from an Input Battery Voltage Range of +1.8V to +32V
Power-On-Reset Monitoring on VCC Pin
Excellent Line and Load Transient Responses
PFM Mode for Increased Light Load Efficiency
Selectable PWM Frequency from 4 Preset Values
Integrated MOSFET Drivers
Integrated Bootstrap Forward P-CH MOSFET
Adjustable Integrated Soft-Start and Soft-Stop
Selectable Forced PWM or Automatic PFM/PWM Mode
Power Good Monitoring
70% Under-Voltage Protection
125% Over-Voltage Protection
Adjustable Current-Limit Protection
Using Sense Low-Side MOSFET’s RDS(ON)
Over-Temperature Protection
Auto Rework from Protection Mode
TDFN-10 3x3 Package
Lead Free and Green Devices Available (RoHS Compliant)</TD>
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Applications




Notebook
Table PC
Hand-Held Portable
AIO PC
LCD Monitor / TV
Battery Charger
ADSL ModemTelecom / Networking Equipment 

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