參數(shù)資料
型號: TPS5300DAP
英文描述: Analog IC
中文描述: 模擬IC
文件頁數(shù): 1/16頁
文件大?。?/td> 231K
代理商: TPS5300DAP
TPS5300
IMVP MOBILE POWER SUPPLY CONTROLLER
SLVS334 – DECEMBER 2000
1
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
Single-Chip Speed Step Solution
Hysteretic Controller Provides Fast
Transient Response Time and Reduced
Output Capacitance
Two Linear Regulator Controllers
Regulating Clock and I/O Voltages
Internal 2-A (Typ) Gate Drivers With
Bootstrap Diode Which Increase Efficiency
5-Bit Dynamic VID
Active Droop Compensation Enables Tight
Dynamic Regulation for Reduced Output
Capacitance
Power Saving Mode (PSM) Promotes Long
Battery Life
High Bandwidth Current Sense Amplifier
Adaptive Dead-Time Control Circuit
Prevents Cross Conduction
OVP, OCP, UVLO, UVP, and Thermal System
Protection
VGATE Terminal Provides Power-Good
Signal for All Three Outputs
Enable External Terminal (ENABLE_EXT)
32-Pin TSSOP PowerPAD
Enhances
Thermal Performance
1% Reference Voltage Accuracy
description
The TPS5300 is a hysteretic synchronous-buck controller, with two on-chip linear regulator controllers,
incorporating speed-step output voltage positioning technology. The TPS5300 provides a precise,
programmable supply voltage to a mobile processor. A ripple regulator provides the core voltage, while two
linear regulator drivers regulate external NPN power transistors for the I/O and CLK voltages. A 5-bit voltage
identification (VID) DAC allows programming for the ripple regulator voltage to values between 0.925 V to
1.275 V in 25 mV steps and 1.30 V to 2 V in 50 mV. The fast transient response time and active voltage DROOP
positioning reduce the number of output capacitors required to keep the output voltage within tight dynamic
voltage regulation limits. The power saving mode (PSM) allows the user to select a single operating ramp or
allows the controller to automatically switch to lower frequencies at low loads. The high-gain current sense
differential amplifier allows the use of small-value sense resistors that minimize conduction losses. The
TPS5300 includes high-side and low-side gate drivers rated at 2 A typical, that enable efficient operation at
higher frequencies and drive larger or multiple power MOSFETs. An adaptive dead-time circuit minimizes
dead-time losses while preventing cross-conduction of high-side and low-side switches. All three outputs power
up together as they track the same user programmable slowstart voltage. The enable external (ENABLE_EXT)
terminal allows the TPS5300 to activate external switching controllers for additional system power
requirements.
The
TPS5300
features
undervoltage
user-programmable overcurrent protection, and is packaged in a small 32-pin TSSOP PowerPAD
package.
lockout,
overvoltage,
undervoltage,
and
P
Copyright
2000, Texas Instruments Incorporated
PRODUCT PREVIEW information concerns products in the formative or
design phase of development. Characteristic data and other
specifications are design goals. Texas Instruments reserves the right to
change or discontinue these products without notice.
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
PowerPAD is a trademark of Texas Instruments.
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DAP PACKAGE
(TOP VIEW)
DRV_CLK
VSENSE_CLK
DT_SET
ANAGND
VSENSE_CORE
SLOWST
VREFB
VHYST
OCP
DROOP
IOUT
PSM/LATCH
IS–
IS+
VGATE
DRVGND
DRV_IO
VSENSE_IO
VBIAS
ENABLE_EXT
RAMP
VID0
VID1
VID2
VID3
VID4
VR_ON
BOOT
TG
PH
V
CC
BG
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