參數(shù)資料
型號(hào)： ADP1875ARQZ-0.3-R7
廠商： ANALOG DEVICES INC
元件分類： 穩(wěn)壓器
英文描述： SWITCHING CONTROLLER, 300 kHz SWITCHING FREQ-MAX, PDSO16
封裝： ROHS COMPLIANT, MO-137AB, QSOP-16
文件頁數(shù)： 18/44頁
文件大小： 2475K
代理商： ADP1875ARQZ-0.3-R7
ADP1874/ADP1875
Rev. 0 | Page 25 of 44
093
47
-18
1
690mV
640mV
600mV
530mV
FB
HYSTERESIS (50mV)
OUTPUT OVERVOLTAGE
PGOOD DEASSERT
PGOOD
REASSERT
PGOOD
ASSERTION
AT POWER-UP
PGOOD
DEASSERTION
AT POWER DOWN
SOFT-START
VEXT
PGOOD
0V
tPGD
Figure 80. Power Good Timing Diagram, tPGD = 12 μs (Diagram May Look Disproportionate for Illustration Purposes.)
09
34
7-
1
82
SLAVE
RTRK2
1k
RTRK1
1k
RPGD
VEXT
CSS
10k
RTOP2
1k
RBOT2
1k
VREG
1.2V VOUT2 (SLAVE)
EN
FB
GND
PGOOD
SS
TRACK
PGND
MASTER
10k
RTOP1
RBOT1
VREG
1.8V VOUT1 (MASTER)
EN
FB
GND
PGND
0.9V
Figure 81. Coincident Tracking Circuit Implementation
09
34
7-
1
84
SLAVE
RTRK2
500
RTRK1
1k
RPGD
VEXT
CSS
10k
RTOP2
1k
RBOT2
1k
VREG
1.2V VOUT2 (SLAVE)
EN
FB
GND
PGOOD
SS
TRACK
PGND
MASTER
10k
RTOP1
RBOT1
VREG
2.5V VOUT1 (MASTER)
EN
FB
GND
PGND
1.7V
Figure 82. Ratiometric Tracking Circuit Implementation
VOLTAGE TRACKING
The ADP1874/ADP1875 feature a voltage-tracking function that
facilitates proper power-up sequencing in applications that require
tracking a master voltage. In this manner, the user is free to
impose a master voltage that typically comes with a selectable
or programmable ramp rate on slave or secondary power rails.
To impose any voltage tracking relationship, the master voltage
rise time must be longer than the slave voltage soft start period.
This is particularly important in applications such as I/O voltage
sequencing and core voltage applications where specific power
sequencing is required.
Tracking is made possible by four inputs to the error amplifier,
three of which are input pins to the IC. The TRACK and SS pins
are positive inputs, and the FB pin provides the negative feedback
from the output voltage via the divider network. The fourth input
to the amplifier is the reference voltage of 0.6 V. The negative
feedback pin (FB pin) regulates the output voltage to the lowest
of the three positive inputs (TRACK, SS, and 0.6 V reference).
In all tracking configurations, the slave output can be set to as
low as 0.6 V for a given operating condition. The master voltage
must have a longer rise time than the slaves programmed soft
start period; otherwise, the tracking relationship will not be
observed at the slave output.
Coincident and ratiometric tracking are two possible tracking
configuration options offered by the ADP1874/ADP1875.
Coincident tracking is the most commonly used tracking
technique. It is primarily used in core and I/O sequencing
applications. The ramp rate of the master voltage is fully
imposed onto the ramp rate of the slave output voltage until it
has reached its regulation setpoint. Connecting the TRACK pin,
by differentially tapping onto the master voltage via a resistive
divider of similar ratio to the slave feedback divider network,
is depicted in Figure 83.
0
9347-
083
MASTER VOLTAGE
SLAVE VOLTAGE
TIME (ms)
OU
TP
U
T
V
O
L
T
A
G
E
(V
)
Figure 83. Coincident Tracking: Master Voltage—Slave Voltage Tracking
Relationship
相關(guān)PDF資料
PDF描述
ADP2121ACBZ-1.85R7 1.222 A SWITCHING REGULATOR, 6640 kHz SWITCHING FREQ-MAX, PBGA6
ADS-119MC 1-CH 12-BIT FLASH METHOD ADC, PARALLEL ACCESS, CDIP24
ADS6243IRGZT 2-CH 14-BIT PROPRIETARY METHOD ADC, SERIAL ACCESS, PQCC48
ADS6242IRGZTG4 2-CH 14-BIT PROPRIETARY METHOD ADC, SERIAL ACCESS, PQCC48
ADS7806PB 1-CH 12-BIT SUCCESSIVE APPROXIMATION ADC, SERIAL/PARALLEL ACCESS, PDIP28
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
ADP1875ARQZ-1.0-R7 功能描述:IC REG CTRLR BUCK PWM CM 16-QSOP RoHS:是 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 切換控制器 系列:- 標(biāo)準(zhǔn)包裝:2,500 系列:- PWM 型:電流模式 輸出數(shù):1 頻率 - 最大:500kHz 占空比:96% 電源電壓:4 V ~ 36 V 降壓:無 升壓:是 回掃:無 反相:無 倍增器:無 除法器:無 Cuk:無 隔離:無 工作溫度:-40°C ~ 125°C 封裝/外殼:24-WQFN 裸露焊盤 包裝:帶卷 (TR)
ADP1876 制造商:AD 制造商全稱:Analog Devices 功能描述:600 kHz Dual Output Synchronous Buck
ADP1876ACPZ-R7 功能描述:IC REG CTRLR BUCK PWM CM 32LFCSP RoHS:是 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 切換控制器 系列:- 特色產(chǎn)品:LM3753/54 Scalable 2-Phase Synchronous Buck Controllers 標(biāo)準(zhǔn)包裝:1 系列:PowerWise® PWM 型:電壓模式 輸出數(shù):1 頻率 - 最大:1MHz 占空比:81% 電源電壓:4.5 V ~ 18 V 降壓:是 升壓:無 回掃:無 反相:無 倍增器:無 除法器:無 Cuk:無 隔離:無 工作溫度:-5°C ~ 125°C 封裝/外殼:32-WFQFN 裸露焊盤 包裝:Digi-Reel® 產(chǎn)品目錄頁面:1303 (CN2011-ZH PDF) 其它名稱:LM3754SQDKR
ADP1876-EVALZ 功能描述:BOARD EVAL FOR ADP1876 RoHS:是 類別:編程器，開發(fā)系統(tǒng) >> 評(píng)估板 - DC/DC 與 AC/DC（離線）SMPS 系列:* 標(biāo)準(zhǔn)包裝:1 系列:- 主要目的:DC/DC，步降 輸出及類型:1，非隔離 功率 - 輸出:- 輸出電壓:3.3V 電流 - 輸出:3A 輸入電壓:4.5 V ~ 28 V 穩(wěn)壓器拓?fù)浣Y(jié)構(gòu):降壓 頻率 - 開關(guān):250kHz 板類型:完全填充 已供物品:板 已用 IC / 零件:L7981 其它名稱:497-12113STEVAL-ISA094V1-ND
ADP1877 制造商:AD 制造商全稱:Analog Devices 功能描述:Dual Output Synchronous Buck PWM Controller With Tracking
發(fā)布緊急采購(gòu)，3分鐘左右您將得到回復(fù)。

采購(gòu)需求

(若只采購(gòu)一條型號(hào)，填寫一行即可)

發(fā)布成功！您可以繼續(xù)發(fā)布采購(gòu)。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

發(fā)布成功！您可以繼續(xù)發(fā)布采購(gòu)。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

*型號(hào) *數(shù)量 廠商 批號(hào) 封裝
添加更多采購(gòu)

我的聯(lián)系方式

*
*
*