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參數(shù)資料
| 型號(hào)： | MAX15020 |
| 廠商： | Maxim Integrated Products, Inc. |
| 元件分類： | DC/DC變換器 |
| 英文描述： | 2A, 40V Step-Down DC-DC Converter with Dynamic Output-Voltage Programming |
| 中文描述： | 2A、40V降壓型DC-DC轉(zhuǎn)換器，可動(dòng)態(tài)設(shè)置輸出電壓 |
| 文件頁(yè)數(shù)： | 10/19頁(yè) |
| 文件大?。?/td> | 363K |
| 代理商： | MAX15020 |
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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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| MAX15020ATP+ | 功能描述:直流/直流開(kāi)關(guān)轉(zhuǎn)換器 2A 40V Step-Down w/Dynamic Output-V RoHS:否 制造商:STMicroelectronics 最大輸入電壓:4.5 V 開(kāi)關(guān)頻率:1.5 MHz 輸出電壓:4.6 V 輸出電流:250 mA 輸出端數(shù)量:2 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT |
| MAX15020ATP+T | 功能描述:直流/直流開(kāi)關(guān)轉(zhuǎn)換器 2A 40V Step-Down w/Dynamic Output-V RoHS:否 制造商:STMicroelectronics 最大輸入電壓:4.5 V 開(kāi)關(guān)頻率:1.5 MHz 輸出電壓:4.6 V 輸出電流:250 mA 輸出端數(shù)量:2 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT |
| MAX15020EVKIT+ | 功能描述:電源管理IC開(kāi)發(fā)工具 MAX15020 Eval Kit RoHS:否 制造商:Maxim Integrated 產(chǎn)品:Evaluation Kits 類型:Battery Management 工具用于評(píng)估:MAX17710GB 輸入電壓: 輸出電壓:1.8 V |
| MAX15021ATB+ | 功能描述:直流/直流開(kāi)關(guān)調(diào)節(jié)器 DUAL 4A/2A RoHS:否 制造商:International Rectifier 最大輸入電壓:21 V 開(kāi)關(guān)頻率:1.5 MHz 輸出電壓:0.5 V to 0.86 V 輸出電流:4 A 輸出端數(shù)量: 最大工作溫度: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體: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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