参数资料
型号: MAX1716EEG+
厂商: Maxim Integrated Products
文件页数: 13/33页
文件大小: 0K
描述: IC REG CTRLR BUCK PWM CM 24-QSOP
产品培训模块: Lead (SnPb) Finish for COTS
Obsolescence Mitigation Program
标准包装: 50
PWM 型: 电流模式
输出数: 1
频率 - 最大: 550kHz
占空比: 100%
电源电压: 2 V ~ 28 V
降压:
升压:
回扫:
反相:
倍增器:
除法器:
Cuk:
隔离:
工作温度: -40°C ~ 85°C
封装/外壳: 24-SSOP(0.154",3.90mm 宽)
包装: 管件
High-Speed, Adjustable, Synchronous Step-Down
Controllers with Integrated Voltage Positioning
Pin Description (continued)
PIN
21
22
23
24
NAME
SKIP
BST
LX
CS
FUNCTION
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.
Boost Flying-Capacitor Connection. Connect to an external capacitor and diode according to the
standard application circuit (Figure 1).
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.
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.
Table 1. Component Selection for Standard Applications
COMPONENT
Output Voltage
Input Voltage Range
Maximum Load Current
Inductor
TON Level
Frequency
High-Side MOSFET
Low-Side MOSFET
Input Capacitor
CIRCUIT 1
(FIGURE 1)
1.6V
7V to 24V
18A
0.68 μ H
Sumida
CDEP134H-0R6
or Panasonic
ETQP6F0R6BFA
Float
300kHz
International Rectifier
(2) IRF7811
Fairchild (2) FDS7764A
Or International
Rectifier (2) IRF7811
(5) 10 μ F
Taiyo Yuden
TMK432BJ106
CIRCUIT 2
(FIGURE 11)
1.3V
7V to 24V
12A
1 μ H
Sumida
CEP125-1R0MC
or Panasonic
ETQP6FIRIBFA
Float
300kHz
International Rectifier
IRF7811
Fairchild (2) FDS7764A
Or International
Rectifier (2) IRF7811
(4) 10 μ F
Taiyo Yuden
TMK432BJ106
CIRCUIT 3
(FIGURE 12)
1.0V
7V to 24V
12A
0.68 μ H
Sumida
CDEP134H-0R6
or Panasonic
ETQP6F0R6BFA
REF
400kHz
International Rectifier
IRF7811
Fairchild (2) FDS7764A
Or International
Rectifier (2) IRF7811
(4) 10 μ F
Taiyo Yuden
TMK432BJ106
CIRCUIT 4
(FIGURE 13)
1.6V
7V to 24V
18A
0.47 μ H
Sumitomo
CXE-R47
GND
550kHz
International Rectifier
(2) IRF7811
Fairchild (2) FDS7764A
Or International
Rectifier (2) IRF7811
(5) 10 μ F
Taiyo Yuden
TMK432BJ106
(8) 47 μ F
(5) 220 μ F
(4) 220 μ F
(4) 220 μ F
Taiyo Yuden
Output Capacitor
Panasonic
EEFUE0E221R
Panasonic
EEFUE0E221R
Panasonic
EEFUE0E221R
JMK432BJ476MM
or TDK
C4532X5ROJ476M
Current-Sense Resistor
ILIM Level
Voltage-Positioning
Resistor Ratio
3m ?
V REF /3
1:1 (0.5x)
3.5m ?
V REF /4
1:2 (0.66x)
3.5m ?
V REF /4
1:2 (0.66x)
3m ?
V REF /3
1:1 (0.5x)
______________________________________________________________________________________
13
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