參數(shù)資料
型號(hào)： TPS65000RTER
廠商： TEXAS INSTRUMENTS INC
元件分類： 穩(wěn)壓器
英文描述： 1.4 A SWITCHING REGULATOR, 2847 kHz SWITCHING FREQ-MAX, PQCC16
封裝： 3 X 3 MM, GREEN, PLASTIC, QFN-16
文件頁數(shù)： 5/34頁
文件大?。?/td> 0K
代理商： TPS65000RTER
SW
VINDCDC
FB_DCDC
L
C
O
R
DC2
Z
LOAD
EN_DCDC
MODE
V
REF(DCDC)
+
-
θJA Diode
P
A
PGND
AGND
P
Oscillator
DISCHG
R
DC1
C
F
SwitchControl
(
)
(
)
DC1
DC2
DCDC
FB_DCDC
DC2
DC1
DC2
DCDC
DC2
R
+ R
V
= V
x
R
+ R
V
= 0.6V x
R
www.ti.com
SLVS810B – JUNE 2009 – REVISED AUGUST 2010
DETAILED DESCRIPTION
Step-Down Converter
The step down converter is intended to allow maximum flexibility in the end equipment. The output voltage is
user selectable with a resistor network on the output. Figure 21 illustrates the necessary connections.
Figure 21. DCDC Block Diagram and Output Voltage Setting
The output voltage of the DCDC converter is set by Equation 1:
(1)
The combined resistance of RDC1 and RDC2 should be less than 1 M.
Fixed output voltages and additional current limit options are also possible. Please contact Texas Instruments for
further information.
The step-down converter has two modes of operation to maximize efficiency at different load conditions. At
moderate to heavy load currents, the device operates in a fixed frequency pulse width modulation (PWM) mode
that results in small output ripple and high efficiency. Pulling the MODE pin to a DC high level will result in PWM
mode over the entire load range.
At light load currents, the device operates in a pulsed frequency modulation (PFM) mode to improve efficiency.
The transition to this mode occurs when the inductor current through the low-side FET becomes zero, indicating
discontinuous conduction. PFM mode also results in the output voltage increasing by 1% from its nominally set
value. This voltage positioning is intended to minimize the voltage undershoot of a load step from light to heavy
loads, as when a processor moves from sleep to active modes, and the voltage overshoot at load throw-off.
Figure 22 shows the voltage positioning behavior for a light to heavy load step.
Copyright 2009–2010, Texas Instruments Incorporated
13
相關(guān)PDF資料
PDF描述
TRU050-GACGA-13M8240000 PHASE LOCKED LOOP, CDSO16
TRU050-GALHA-25M2480000 PHASE LOCKED LOOP, CDSO16
TRU050-GALHB-41M2416000 PHASE LOCKED LOOP, CDSO16
TRU050-GALNA-19M4400000 PHASE LOCKED LOOP, CDSO16
TRU050-GBCHA-25M2480000 PHASE LOCKED LOOP, CDSO16
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
TPS65000RTET 功能描述:PMIC 解決方案 2.25MHz Step-Down Converter RoHS:否 制造商:Texas Instruments 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:QFN-24 封裝:Reel
TPS65000TRTERQ1 功能描述:Handheld/Mobile Devices PMIC 16-WQFN (3x3) 制造商:texas instruments 系列:汽車級(jí)，AEC-Q100 包裝:剪切帶（CT） 零件狀態(tài):有效 應(yīng)用:手持/移動(dòng)設(shè)備 電流 - 電源:- 電壓 - 電源:2.3 V ~ 6 V 工作溫度:-40°C ~ 105°C 安裝類型:表面貼裝 封裝/外殼:16-WFQFN 裸露焊盤 供應(yīng)商器件封裝:16-WQFN（3x3） 標(biāo)準(zhǔn)包裝:1
TPS65001EVM-453 功能描述:電源管理IC開發(fā)工具 TPS65001EVM-453 Eval Mod RoHS:否 制造商:Maxim Integrated 產(chǎn)品:Evaluation Kits 類型:Battery Management 工具用于評(píng)估:MAX17710GB 輸入電壓: 輸出電壓:1.8 V
TPS65001RUKR 功能描述:PMIC 解決方案 2.25MHz St-Down Cnvrtr w/ Dual LDO RoHS:否 制造商:Texas Instruments 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:QFN-24 封裝:Reel
TPS65001RUKT 功能描述:PMIC 解決方案 2.25MHz St-Down Cnvrtr w/ Dual LDO RoHS:否 制造商:Texas Instruments 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:QFN-24 封裝:Reel
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