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| 型号： | ADP1879ACPZ-0.6-R7 |
| 厂商： | Analog Devices Inc |
| 文件页数： | 1/40页 |
| 文件大小： | 0K |
| 描述： | IC REG CTRLR BUCK PWM CM 14LFCSP |
| 标准包装： | 1,500 |
| PWM 型： | 电流模式 |
| 输出数： | 1 |
| 频率 - 最大： | 600kHz |
| 占空比： | 65% |
| 电源电压： | 2.95 V ~ 20 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： | -40°C ~ 125°C |
| 封装/外壳： | 14-WFDFN 裸露焊盘，CSP |
| 包装： | 带卷 (TR) |
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Synchronous Buck Controller with
C onstant 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
BST
DRVH
SW
DRVL
SS
L
Minimum output voltage: 0.6 V
0.6 V reference voltage with ±1.0% accuracy
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 (ADP1879 only)
Resistor programmable current limit
Power good with internal pull-up resistor
Externally programmable soft start
Thermal overload protection
Short-circuit protection
C C
C C2
R C
10k ?
V REG
R TO P
V OUT
R BOT
C VREG2
C VREG
R RES
VIN
ADP1878/
ADP1879
COMP
EN
FB
GND
VREG
PGOOD
RES
PGND
C IN
C BST
R PGD
C SS
Q1
C OUT
Q2
V EXT
V OUT
LOAD
Standalone precision enable input
Integrated bootstrap diode for high-side drive
Starts into a precharged output
Available in a 14-lead LFCSP_WD package
APPLICATIONS
Telecommunications and networking systems
Mid-to-high end servers
Set-top boxes
DSP core power supplies
GENERAL DESCRIPTION
The ADP1878 / ADP1879 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. These devices offer optimum performance
at low duty cycles by using a valley, current-mode control architec-
ture allowing the ADP1878 / ADP1879 to drive all N-channel power
Figure 1.
conditions. The low-side current sense, current gain scheme and
integration of a boost diode, together with the PSM/forced
pulse-width modulation (PWM) option, reduce the external
device count and improve efficiency.
The ADP1878 / ADP1879 operate over the ?40°C to +125°C
junction temperature range and are available in a 14-lead
LFCSP_WD package.
100
stages to regulate output voltages to as low as 0.6 V.
The ADP1879 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 ADP1879 Power Saving Mode (PSM) section for
more information).
95
90
85
80
75
70
65
60
V IN = 5V (PSM)
V IN = 16.5V
V IN = 13V
V OUT = 1.8V
f SW = 300kHz
30
Available in three frequency options (300 kHz, 600 kHz, and
1.0 MHz) plus the PSM option, the ADP1878 / ADP1879 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). In
addition, soft start programmability is included to limit input
inrush current from the input supply during startup and to
provide reverse current protection during precharged output
55 V IN = 13V (PSM)
50 T A = 25°C
45
40 V IN = 16.5V (PSM)
WüRTH INDUCTOR:
35 744325120, L = 1.2μH, DCR = 1.8m ?
INFINEON FETs:
BSC042N03MS G (UPPER/LOWER)
25
10 100 1k 10k 100k
LOAD CURRENT (mA)
Figure 2. ADP1878 / ADP1879 Efficiency vs. Load Current (V OUT = 1.8 V, 300 kHz)
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.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700 ?2011–2012 Analog Devices, Inc. All rights reserved.
Trademarks and registered trademarks are the property of their respective owners.
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相关代理商/技术参数 |
参数描述 |
|---|---|
| ADP1879ACPZ-1.0-R7 | 功能描述:IC REG CTRLR BUCK PWM CM 14LFCSP 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) |
| ADP1880ACPZ-R7 | 制造商:Analog Devices 功能描述: |
| ADP1882 | 制造商:AD 制造商全称:Analog Devices 功能描述:Synchronous Current-Mode with Constant On-Time,PWM Buck Controller |
| ADP1882-0.3-EVALZ | 功能描述:EVAL BOARD FOR ADP1882 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 |
| ADP1882-0.6-EVALZ | 功能描述:EVAL BOARD FOR ADP1882 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 |
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