T
echcode
®
High-Performance PWM Controller
DATASHEET
TD1730
汪工 ＱＱ：１９２９７９４２３８ ＴＥＬ：１３８２８７１９４１０
General Description
The TD1730 is a single‐phase, constant‐on‐time,
synchronous PWM controller, which drives N‐channel
MOSFETs. The TD1730 steps down high voltage to
generate low‐voltage chipset or RAM supplies in notebook
computers.
The TD1730 provides excellent transient response and
accurate DC voltage output in either PFM or PWM Mode. In
Pulse Frequency Mode (PFM), the TD1730 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 TD1730 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 TD1730 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
actively discharges the output capacitors with controlled
reverse inductor current.
The TD1730 is available in 10pin TDFN 3x3 package.
Features
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 R
DS(ON)
Over‐Temperature Protection
Auto Rework from Protection Mode
TDFN‐10 3x3 Package
Lead Free and Green Devices Available (RoHS Compliant)
Applications
Notebook
Table PC
Hand‐Held Portable
AIO PC
LCD Monitor / TV
Battery Charger
ADSL Modem
Telecom / Networking Equipment
December, 20, 2011
Techcode Semiconductor Limited
1
QQ:1929794238
TD [ 美国泰德半导体有限公司 ]
