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參數(shù)資料
| 型號(hào)： | TPS56100PWPR |
| 元件分類： | 基準(zhǔn)電壓源/電流源 |
| 英文描述： | Voltage-Mode SMPS Controller |
| 中文描述： | 電壓模式開關(guān)電源控制器 |
| 文件頁(yè)數(shù)： | 2/34頁(yè) |
| 文件大?。?/td> | 811K |
| 代理商： | TPS56100PWPR |
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TPS56302
DUAL-OUTPUT LOW-INPUT-VOLTAGE
DSP POWER SUPPLY CONTROLLER WITH SEQUENCING
SLVS289A
–
MARCH 2000
–
REVISED OCTOBER 2000
2
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
description (continued)
To promote better system reliability during power up, voltage sequencing and protection are controlled such that
the core and I/O power up together with the same slow-start voltage. At power down, the LDO and ripple
regulator are discharged towards ground for added protection. The TPS56302 also includes inhibit, slow-start,
and under-voltage lockout features to aide in controlling power sequencing. A tri-level voltage identification
definition (VID) sets both regulated voltages to any of 9 preset voltage pairs from 1.3 V to 3.3 V. Other voltages
are possible by implementing an external voltage divider. Strong MOSFET drivers, with a typical peak current
rating of 2-A sink and source are included on chip, which allows paralleling MOSFETs to be driven and allowing
higher current to be controlled. The high-side driver features a floating bootstrap driver with an internal bootstrap
synchronous rectifier. Many protection features are incorporated within the device to ensure better system
integrity. An open-drain output power good status circuit monitors both output voltages, and is pulled low if either
output falls below the threshold. An over current shutdown circuit protects the high-side power MOSFET against
short-to-ground faults, while over voltage protection turns off the output drivers and LDO controller if either
output exceeds its threshold. Under voltage protection turns off the high-side and low-side MOSFET drivers and
the LDO controller if either output is 25% below V
REF
. Lossless current-sensing is implemented by detecting
the drain-source voltage drop across the high-side power MOSFET while it is conducting. The TPS56302 is fully
compliant with TI DSP power requirements.
AVAILABLE OPTIONS
PACKAGES
TSSOP
(PWP)
TJ
EVALUATION MODULE
–
40
°
C to 125
°
C
The PWP package is also available taped and reel. To order, add an R to the end of
the part number (e.g., TPS56302PWPR).
TPS56302PWP
TPS56302EVM
–
163 (SLVP163)
Table 1. Voltage Identification Code
#
VID TERMINALS
56302
56300
VID1
VID0
VREF
–
LDO#
(VDC)
VREF
–
RR#
(VDC)
VREF
–
RR#
(VDC)
VREF
–
LDO#
(VDC)
0
0
1.30
1.50
1.30
1.50
0
1
1.50
1.80
1.50
1.80
0
2
1.30
1.80
1.30
1.80
1
0
1.80
3.30
1.80
3.30
1
1
1.30
1.30
1.30
1.30
1
2
2.50
3.30
2.50
3.30
2
0
1.30
2.50
1.30
2.50
2
1
1.50
3.30
1.50
3.30
2
2
1.80
2.50
1.80
2.50
0 = ground (GND), 1 = floating(VBIAS/2), 2 = (VBIAS)
§
RR = Ripple Regulator, LDO = Low Drop-Out Regulator
VBIAS/2 is internal, leave the VID pin floating. Adding an external 0.1-
μ
F capacitor to ANAGND may be used
to avoid erroneous level.
#External resistors may be used as a voltage divider (from VOUT to VSEN
–
xx to ground) to program output
voltages to other values.
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