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| 型号： | ADP1875-0.3-EVALZ |
| 厂商： | Analog Devices Inc |
| 文件页数： | 1/44页 |
| 文件大小： | 0K |
| 描述： | BOARD EVAL 300KHZ ADP1875 |
| 标准包装： | 1 |
| 系列： | * |
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Synchronous Buck Controller with Constant
On-Time and Valley Current Mode
Data Sheet
FEATURES
Power input voltage range: 2.95 V to 20 V
On-board bias regulator
TYPICAL APPLICATIONS CIRCUIT
V IN = 2.95V TO 20V
Minimum output voltage: 0.6 V
0.6 V reference voltage with ±1.0% accuracy
C C
R C
C C2
VIN
ADP1874/
ADP1875
C IN
SW
DRVL
Supports all N-channel MOSFET power stages
Available in 300 kHz, 600 kHz, and 1.0 MHz options
No current-sense resistor required
Power saving mode (PSM) for light loads ( ADP1875 only)
Resistor programmable current limit
Power good with internal pull-up resistor
Externally programmable soft start
Thermal overload protection
Short-circuit protection
10k?
VREG
R TOP
V OUT
R BOT
C VREG2
C VREG
R RES
COMP BST
EN DRVH
FB
GND
VREG PGOOD
VREG_IN SS
RES
TRACK
PGND
C BST Q1
L
C OUT
Q2
R PGD
V EXT
C SS
R TRK2
V MASTER
R TRK1
V OUT
LOAD
Standalone precision enable input
Integrated bootstrap diode for high-side drive
Starts into a precharged output
Figure 1. Typical Applications Circuit
Available in a 16-lead QSOP package
APPLICATIONS
Telecom and networking systems
Mid- to high-end servers
Set-top boxes
DSP core power supplies
100
95
90
85
80
75
70
65
60
V IN = 5V (PSM)
V IN = 16.5V
V IN = 13V
GENERAL DESCRIPTION
55
50
V IN = 13V (PSM)
T A = 25°C
The ADP1874 / ADP1875 are versatile current mode, synchronous
step-down controllers. They provide superior transient response,
optimal stability, and current-limit protection by using a constant
on-time, pseudo fixed frequency with a programmable current
limit, current control scheme. In addition, these devices offer
45
40 V IN = 16.5V (PSM)
35
30
25
10 100
V OUT = 1.8V
f SW = 300kHz
WüRTH INDUCTOR:
744325120, L = 1.2μH, DCR = 1.8mΩ
INFINEON FETs:
BSC042N03MS G (UPPER/LOWER)
1k 10k
LOAD CURRENT (mA)
100k
optimum performance at low duty cycles by using a valley, current
to drive all N-channel power stages to regulate output voltages
to as low as 0.6 V.
The ADP1875 is the power saving mode (PSM) version of
the device and is capable of pulse skipping to maintain output
regulation while achieving improved system efficiency at light
loads (see the ADP1875 Power Saving Mode (PSM) section for
more information).
Available in three frequency options (300 kHz, 600 kHz, and
1.0 MHz, plus the PSM option), the ADP1874 / ADP1875 are well
suited for a wide range of applications that require a single-input
power supply range from 2.95 V to 20 V. Low voltage biasing is
supplied via a 5 V internal low dropout regulator (LDO).
Rev. A
Information furnished by Analog Devices is believed to be accurate and reliable. However, no
responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other
rights of third parties that may result from its use. Specifications subject to change without notice. No
license is granted by implication or otherwise under any patent or patent rights of Analog Devices.
Trademarks and registered trademarks are the property of their respective owners.
Figure 2. ADP1874 / ADP1875 Efficiency vs. Load Current (V OUT = 1.8 V, 300 kHz)
In addition, soft start programmability is included to limit input
in-rush current from the input supply during startup and to
provide reverse current protection during precharged output
conditions. The low-side current sense, current gain scheme, and
integration of a boost diode, along with the PSM/forced pulse-
width modulation (PWM) option, reduce the external part count
and improve efficiency.
The ADP1874 / ADP1875 operate over the ?40°C to +125°C
junction temperature range and are available in a 16-lead QSOP
package.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700 www.analog.com
Fax: 781.461.3113 ?2011–2012 Analog Devices, Inc. All rights reserved.
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相关代理商/技术参数 |
参数描述 |
|---|---|
| ADP1875-1.0-EVALZ | 功能描述:BOARD EVAL 1MHZ ADP1875 RoHS:是 类别:编程器，开发系统 >> 评估板 - DC/DC 与 AC/DC（离线）SMPS 系列:* 产品培训模块:Obsolescence Mitigation Program 标准包装:1 系列:True Shutdown™ 主要目的:DC/DC，步升 输出及类型:1，非隔离 功率 - 输出:- 输出电压:- 电流 - 输出:1A 输入电压:2.5 V ~ 5.5 V 稳压器拓扑结构:升压 频率 - 开关:3MHz 板类型:完全填充 已供物品:板 已用 IC / 零件:MAX8969 |
| ADP1875ARQZ-0.3-R7 | 功能描述:IC REG CTRLR BUCK PWM CM 16-QSOP RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - DC DC 切换控制器 系列:- 特色产品:LM3753/54 Scalable 2-Phase Synchronous Buck Controllers 标准包装:1 系列:PowerWise® PWM 型:电压模式 输出数:1 频率 - 最大:1MHz 占空比:81% 电源电压:4.5 V ~ 18 V 降压:是 升压:无 回扫:无 反相:无 倍增器:无 除法器:无 Cuk:无 隔离:无 工作温度:-5°C ~ 125°C 封装/外壳:32-WFQFN 裸露焊盘 包装:Digi-Reel® 产品目录页面:1303 (CN2011-ZH PDF) 其它名称:LM3754SQDKR |
| ADP1875ARQZ-0.6-R7 | 功能描述:IC REG CTRLR BUCK PWM CM 16-QSOP RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - DC DC 切换控制器 系列:- 标准包装:2,500 系列:- PWM 型:电流模式 输出数:1 频率 - 最大:500kHz 占空比:96% 电源电压:4 V ~ 36 V 降压:无 升压:是 回扫:无 反相:无 倍增器:无 除法器:无 Cuk:无 隔离:无 工作温度:-40°C ~ 125°C 封装/外壳:24-WQFN 裸露焊盘 包装:带卷 (TR) |
| ADP1875ARQZ-1.0-R7 | 功能描述:IC REG CTRLR BUCK PWM CM 16-QSOP RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - DC DC 切换控制器 系列:- 标准包装:2,500 系列:- PWM 型:电流模式 输出数:1 频率 - 最大:500kHz 占空比:96% 电源电压:4 V ~ 36 V 降压:无 升压:是 回扫:无 反相:无 倍增器:无 除法器:无 Cuk:无 隔离:无 工作温度:-40°C ~ 125°C 封装/外壳:24-WQFN 裸露焊盘 包装:带卷 (TR) |
| ADP1876 | 制造商:AD 制造商全称:Analog Devices 功能描述:600 kHz Dual Output Synchronous Buck |
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