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| 型号： | ADP1872-BL2-EVZ |
| 厂商： | Analog Devices Inc |
| 文件页数： | 1/40页 |
| 文件大小： | 0K |
| 描述： | EVAL BOARD FOR ADP1872 |
| 标准包装： | 1 |
| 主要目的： | DC/DC，步降 |
| 稳压器拓扑结构： | 降压 |
| 板类型： | 裸（未填充） |
| 已供物品： | 裸板 |
| 已用 IC / 零件： | ADP1872 |
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Synchronous Current-Mode with
C onstant On-Time, PWM Buck Controller
Data Sheet
FEATURES
Power input voltage as low as 2.75 V to 20 V
Bias supply voltage range: 2.75 V to 5.5 V
TYPICAL APPLICATIONS CIRCUIT
V IN = 2.75V TO 20V
Minimum output voltage: 0.6 V
0.6 V reference voltage with ±1.0% accuracy
C C
R C
C C2
VIN
ADP1872/
ADP1873
C IN
Supports all N-channel MOSFET power stages
Available in 300 kHz, 600 KHz, and 1.0 MHz options
V OUT
R TOP
COMP/EN
FB
BST
DRVH
C BST
Q1
L
V OUT
No current-sense resistor required
R BOT
GND
SW
C OUT
+
Power saving mode (PSM) for light loads (ADP1873 only)
Resistor-programmable current-sense gain
Thermal overload protection
Short-circuit protection
C VDD2
V DD = 2.75V
TO 5.5V
C VDD
VDD
PGND
DRVL
R RES
Q2
LOAD
5A
Precision enable input
Figure 1.
Integrated bootstrap diode for high-side drive
140 μA shutdown supply current
Starts into a precharged load
Small, 10-lead MSOP package
100
95
90
85
V DD = 5.5V, V IN = 5.5V (PSM )
V DD = 5.5V, V IN = 5.5V
APPLICATIONS
Telecom and networking systems
Mid to high end servers
Set-top boxes
DSP core power supplies
80
75
70
65
60
55
50
45
V DD = 5.5V, V IN = 13.0V (PSM)
V DD = 5.5V, V IN = 16.5V (PSM)
T A = 25°C
V OUT = 1.8V
f SW = 300kHz
WURTH INDUCTOR:
744325120, L = 1.2μH, DCR = 1.8mΩ
INFINEON FETs:
BSC042N03MS G (UPPER/LOWER)
100
1k
10k
100k
LOAD CURRENT (mA)
Figure 2. ADP1872 Efficiency vs. Load Current (V OUT = 1.8 V, 300 kHz)
GENERAL DESCRIPTION
The ADP1872/ADP1873 are versatile current-mode, synchronous
step-down controllers that provide superior transient response,
optimal stability, and current limit protection by using a constant
on-time, pseudo-fixed frequency with a programmable current-
sense gain, current-control scheme. In addition, these devices offer
optimum performance at low duty cycles by using valley current-
mode control architecture. This allows the ADP1872/ADP1873
to drive all N-channel power stages to regulate output voltages
as low as 0.6 V.
The ADP1873 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
section for more information).
Rev. B
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.
Available in three frequency options (300 kHz, 600 kHz, and
1.0 MHz, plus the PSM option), the ADP1872/ADP1873 are
well suited for a wide range of applications. These ICs not only
operate from a 2.75 V to 5.5 V bias supply, but can also accept a
power input as high as 20 V.
In addition, an internally fixed, soft start period is included to limit
input in-rush current from the input supply during startup and
to provide reverse current protection during soft start for a pre-
charged output. 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 ADP1872/ADP1873 operate over the ?40°C to +125°C
junction temperature range and are available in a 10-lead MSOP.
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 ?2009–2012 Analog Devices, Inc. All rights reserved.
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相关代理商/技术参数 |
参数描述 |
|---|---|
| ADP1873-0.3-EVALZ | 功能描述:BOARD EVAL FOR ADP1873-0.3 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 |
| ADP1873-0.6-EVALZ | 功能描述:BOARD EVAL FOR ADP1873-0.6 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 |
| ADP1873-1.0-EVALZ | 功能描述:BOARD EVAL FOR ADP1873-1.0 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 |
| ADP1873ARMZ-0.3-R7 | 功能描述:IC REG CTRLR BUCK PWM CM 10-MSOP 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:100% 电源电压:8.2 V ~ 30 V 降压:无 升压:无 回扫:是 反相:无 倍增器:无 除法器:无 Cuk:无 隔离:是 工作温度:0°C ~ 70°C 封装/外壳:8-DIP（0.300"，7.62mm） 包装:管件 产品目录页面:1316 (CN2011-ZH PDF) |
| ADP1873ARMZ-0.6-R7 | 功能描述:IC REG CTRLR BUCK PWM CM 10-MSOP 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:100% 电源电压:8.2 V ~ 30 V 降压:无 升压:无 回扫:是 反相:无 倍增器:无 除法器:无 Cuk:无 隔离:是 工作温度:0°C ~ 70°C 封装/外壳:8-DIP（0.300"，7.62mm） 包装:管件 产品目录页面:1316 (CN2011-ZH PDF) |
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