參數(shù)資料
型號(hào)： MAX1855
廠商： Maxim Integrated Products, Inc.
元件分類： 數(shù)字信號(hào)處理
英文描述： Fixed-Point Digital Signal Processor 352-FC/CSP 0 to 0
中文描述： 高速、數(shù)字可調(diào)、同步降壓型控制器，集成電壓定位電路
文件頁(yè)數(shù)： 13/33頁(yè)
文件大小： 840K
代理商： MAX1855
M
High-Speed, Adjustable, Synchronous Step-Down
Controllers with Integrated Voltage Positioning
______________________________________________________________________________________
13
Pin Description (continued)
PIN
NAME
FUNCTION
21
SKIP
Pulse-Skipping or Low-Noise Mode Control Input. Connect to V
CC
for low-noise forced-PWM mode.
Connect to GND to enable pulse-skipping operation. Low-noise forced-PWM mode causes inductor
current recirculation at light loads and suppresses pulse-skipping operation. Normal operation
prevents current recirculation.
SKIP
can also be used to disable both overvoltage and undervoltage
protection circuits and clear the fault latch (see
No-Fault Test Mode
).
Do not leave
SKIP
floating.
22
BST
Boost Flying-Capacitor Connection. Connect to an external capacitor and diode according to the
standard application circuit
(Figure 1).
23
LX
External Inductor Connection. Connect LX to the switched side of the inductor. LX serves as the
lower supply rail for the DH high-side gate driver. LX does not connect to the current-limit
comparator.
24
CS
Current-Sense Input. Connect a resistor (R
SENSE
) between CS and PGND. The current-limit
threshold is set by ILIM. If the current-sense signal (Inductor Current
R
SENSE
) exceeds the
current-limit threshold, the MAX1716/MAX1854/MAX1855 will not initiate a new cycle.
COMPONENT
CIRCUIT 1
(FIGURE 1)
CIRCUIT 2
(FIGURE 11)
CIRCUIT 3
(FIGURE 12)
CIRCUIT 4
(FIGURE 13)
Output Voltage
Input Voltage Range
M axi m um Load C ur ent
1.6V
1.3V
1.0V
1.6V
7V to 24V
18A
0.68
μ
H
Sumida
CDEP134H-0R6
or Panasonic
ETQP6F0R6BFA
Float
300kHz
7V to 24V
12A
1
μ
H
Sumida
CEP125-1R0MC
or Panasonic
ETQP6FIRIBFA
Float
300kHz
7V to 24V
12A
0.68
μ
H
Sumida
CDEP134H-0R6
or Panasonic
ETQP6F0R6BFA
REF
400kHz
7V to 24V
18A
Inductor
0.47
μ
H
Sumitomo
CXE-R47
TON Level
Frequency
GND
550kHz
High-Side MOSFET
International Rectifier
(2) IRF7811
International Rectifier
IRF7811
International Rectifier
IRF7811
International Rectifier
(2) IRF7811
Low-Side MOSFET
Fairchild (2) FDS7764A
Or International
Rectifier (2) IRF7811
Fairchild (2) FDS7764A
Or International
Rectifier (2) IRF7811
Fairchild (2) FDS7764A
Or International
Rectifier (2) IRF7811
Fairchild (2) FDS7764A
Or International
Rectifier (2) IRF7811
Input Capacitor
(5) 10
μ
F
Taiyo Yuden
TMK432BJ106
(4) 10
μ
F
Taiyo Yuden
TMK432BJ106
(4) 10
μ
F
Taiyo Yuden
TMK432BJ106
(5) 10
μ
F
Taiyo Yuden
TMK432BJ106
Output Capacitor
(5) 220
μ
F
Panasonic
EEFUE0E221R
(4) 220
μ
F
Panasonic
EEFUE0E221R
(4) 220
μ
F
Panasonic
EEFUE0E221R
(8) 47
μ
F
Taiyo Yuden
JMK432BJ476MM
or TDK
C4532X5ROJ476M
3m
V
REF
/3
Current-Sense Resistor
ILIM Level
Voltage-Positioning
Resistor Ratio
3m
V
REF
/3
3.5m
V
REF
/4
3.5m
V
REF
/4
1:1 (0.5x)
1:2 (0.66x)
1:2 (0.66x)
1:1 (0.5x)
Table 1. Component Selection for Standard Applications
相關(guān)PDF資料
PDF描述
MAX1854EEG High-Speed, Adjustable, Synchronous Step-Down Controllers with Integrated Voltage Positioning
MAX1855EEG Replaced by TMS320C6202B : Fixed-Point Digital Signal Processor 352-FCBGA
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
MAX1855EEG 功能描述:DC/DC 開關(guān)控制器 RoHS:否 制造商:Texas Instruments 輸入電壓:6 V to 100 V 開關(guān)頻率: 輸出電壓:1.215 V to 80 V 輸出電流:3.5 A 輸出端數(shù)量:1 最大工作溫度:+ 125 C 安裝風(fēng)格: 封裝 / 箱體:CPAK
MAX1855EEG+ 制造商:Rochester Electronics LLC 功能描述: 制造商:Maxim Integrated Products 功能描述:
MAX1855EEG-T 功能描述:DC/DC 開關(guān)控制器 RoHS:否 制造商:Texas Instruments 輸入電壓:6 V to 100 V 開關(guān)頻率: 輸出電壓:1.215 V to 80 V 輸出電流:3.5 A 輸出端數(shù)量:1 最大工作溫度:+ 125 C 安裝風(fēng)格: 封裝 / 箱體:CPAK
MAX1855EVKIT 功能描述:DC/DC 開關(guān)控制器 Evaluation Kit for the MAX1716 MAX1854 MAX1855 RoHS:否 制造商:Texas Instruments 輸入電壓:6 V to 100 V 開關(guān)頻率: 輸出電壓:1.215 V to 80 V 輸出電流:3.5 A 輸出端數(shù)量:1 最大工作溫度:+ 125 C 安裝風(fēng)格: 封裝 / 箱體:CPAK
MAX1856EUB 功能描述:電信線路管理 IC RoHS:否 制造商:STMicroelectronics 產(chǎn)品:PHY 接口類型:UART 電源電壓-最大:18 V 電源電壓-最小:8 V 電源電流:30 mA 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:VFQFPN-48 封裝:Tray
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