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参数资料
| 型号： | MAX15020 |
| 厂商： | Maxim Integrated Products, Inc. |
| 元件分类： | DC/DC变换器 |
| 英文描述： | 2A, 40V Step-Down DC-DC Converter with Dynamic Output-Voltage Programming |
| 中文描述： | 2A、40V降压型DC-DC转换器，可动态设置输出电压 |
| 文件页数： | 10/19页 |
| 文件大小： | 363K |
| 代理商： | MAX15020 |
M
2A, 40V Step-Down DC-DC Converter with
Dynamic Output-Voltage Programming
10
______________________________________________________________________________________
MAX15020
ON/OFF
IN
D2
D1
C4
1
μ
F
L1
22
μ
H
V
OUT
DVREG
LX
REG
REFIN
SS
R5
10
R1
97.5k
R2
4.02k
C1
560
μ
F
R7
10k
R8
340
C7
0.1
μ
F
C11
0.027
μ
F
C6
560
μ
F
R3
10k
C9
0.1
μ
F
C2
1
μ
F
C10
1
μ
F
C3
0.1
μ
F
V
IN
7.5V TO 40V
PWM
INPUT
0
BST
R6
10k
C13
330pF
C12
0.1
μ
F
R9
15.8k
FB
COMP
C8
0.22
μ
F
REFOUT
C5
0.1
μ
F
SYNC GND FSEL PGND
EP
Figure 2. Typical Application Circuit
Detailed Description
The MAX15020 voltage-mode step-down converter
contains an internal 0.2
power MOSFET switch. The
MAX15020 input voltage range is 7.5V to 40V. The
internal low R
DS(ON)
switch allows for up to 2A of out-
put current. The external compensation, voltage feed-
forward, and automatically adjustable maximum ramp
amplitude simplify the loop compensation design allow-
ing for a variety of L and C filter components. In shut-
down, the supply current is typically 6μA. The output
voltage is dynamically adjustable from 0.5V to 36V.
Additional features include an externally programmable
UVLO through the ON/
OFF
pin, a programmable soft-
start, cycle-by-cycle current limit, hiccup-mode output
short-circuit protection, and thermal shutdown.
Internal Linear Regulator (REG)
REG is the output terminal of the 8V LDO powered from
IN and provides power to the IC. Connect REG exter-
nally to DVREG to provide power for the internal digital
circuitry. Place a 1μF ceramic bypass capacitor, C2,
next to the IC from REG to GND. During normal opera-
tion, REG is intended for powering up only the internal
circuitry and should not be used to supply power to the
external loads.
UVLO/ON/
OFF
Threshold
The MAX15020 provides a fixed 7V UVLO function
which monitors the input voltage (V
IN
). The device is
held off until V
IN
rises above the UVLO threshold.
ON/
OFF
provides additional turn-on/turn-off control.
Program the ON/
OFF
threshold by connecting a resis-
tive divider from IN to ON/
OFF
to GND. The device
turns on when V
ON/
OFF
rises above the ON/
OFF
thresh-
old (1.225V), given that V
IN
has risen above the UVLO
threshold.
Driving ON/
OFF
to ground places the IC in shutdown.
When in shutdown the internal power MOSFET turns
off, all internal circuitry shuts down, and the quiescent
supply current reduces to 6μA (typ.). Connect an RC
network from ON/
OFF
to GND to set a turn-on delay
that can be used to sequence the output voltages of
multiple devices.
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX15020ATP+ | 功能描述:直流/直流开关转换器 2A 40V Step-Down w/Dynamic Output-V RoHS:否 制造商:STMicroelectronics 最大输入电压:4.5 V 开关频率:1.5 MHz 输出电压:4.6 V 输出电流:250 mA 输出端数量:2 最大工作温度:+ 85 C 安装风格:SMD/SMT |
| MAX15020ATP+T | 功能描述:直流/直流开关转换器 2A 40V Step-Down w/Dynamic Output-V RoHS:否 制造商:STMicroelectronics 最大输入电压:4.5 V 开关频率:1.5 MHz 输出电压:4.6 V 输出电流:250 mA 输出端数量:2 最大工作温度:+ 85 C 安装风格:SMD/SMT |
| MAX15020EVKIT+ | 功能描述:电源管理IC开发工具 MAX15020 Eval Kit RoHS:否 制造商:Maxim Integrated 产品:Evaluation Kits 类型:Battery Management 工具用于评估:MAX17710GB 输入电压: 输出电压:1.8 V |
| MAX15021ATB+ | 功能描述:直流/直流开关调节器 DUAL 4A/2A RoHS:否 制造商:International Rectifier 最大输入电压:21 V 开关频率:1.5 MHz 输出电压:0.5 V to 0.86 V 输出电流:4 A 输出端数量: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:PQFN 4 x 5 |
| MAX15021ATI/V+ | 制造商:Maxim Integrated Products 功能描述:DUAL, 4A/2A, 4MHZ, STEP-DOWN DC-DCREGULATOR WITH TRACKING/SE - Rail/Tube |
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