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参数资料
| 型号： | MAX1917EEE+ |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 12/18页 |
| 文件大小： | 0K |
| 描述： | IC CNTRLR SYNC BUCK 16-QSOP |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 100 |
| 应用： | 控制器，DDR |
| 输入电压： | 4.5 V ~ 22 V |
| 输出数： | 2 |
| 输出电压： | 0.4 V ~ 5 V |
| 工作温度： | 0°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 16-SSOP（0.154"，3.90mm 宽） |
| 供应商设备封装： | 16-QSOP |
| 包装： | 管件 |
Tracking, Sinking and Sourcing, Synchronous Buck
Controller for DDR Memory and Termination Supplies
high-side FET from turning on until DL is fully off. There
must be a low-resistance, low-inductance path from the
DL driver to the MOSFET gate in order for the adaptive
dead-time circuit to work properly. Otherwise, the
sense circuitry in the MAX1917 interprets the MOSFET
gate as off while there is actually still charge left on the
gate. Use very short, wide traces measuring 10
squares to 20 squares (50mils to 100mils wide if the
MOSFET is 1in from the MAX1917). The dead time at
the other edge (DH turning off) is determined by a fixed
35ns (typ) internal delay. The internal pulldown transis-
tor that drives DL low is robust, with a 0.5 ? (typ) on-
R2
resistance. This helps prevent DL from being pulled up
during the fast rise time of the inductor node, due to
capacitive coupling from the drain to the gate of the
massive low-side synchronous-rectifier MOSFET. Some
combinations of high- and low-side FETs may be
encountered that cause excessive gate-drain coupling,
which can lead to efficiency-killing, EMI-producing
shoot-through currents. This can often be remedied by
adding a resistor (R BST ) in series with BST, which
increases the turn-on time of the high-side FET without
degrading the turn-off time (Figure 2).
Typical Application Circuits
VL
VL
5.1k ?
POK
R3
20k ?
3
POK
VL
11
D1
CMPSH-3
C3
4.7 μ F
10V
C2
2 x 330 μ F
6V
C1
1 μ F
6.3V
2.5V
V IN
V+
V DDR
5.5V TO 14V
C9
10
2
V+
DDR
MAX1917
BST
DH
14
15
C4
0.47 μ F
10V
Q1
IRF7463
0.68 μ H/9A
C6
SHDN
Q3
2N7002K
0.47 μ F/25V
C8
0.47 μ F/10V
VL
1
7
5
EN/HSD
REF
ILIM
LX
DL
PGND
16
12
13
2.5V
L1
Q2
IRF7463
6 x 270 μ F
2V
1.25V AT 7A
C5
2 x 10 μ F
6.3V
V OUT
PGND
6
FSEL
VTT
4
8
GND
VTTR
9
C7
1 μ F/6.3V
VTTR
OUTPUT CAPACITORS ARE SELECTED TO COMPLY WITH JEDEC SPECIFICATIONS.
Figure 3. Typical Application Circuit for 1.25V at 7A Output
12
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX1917EEE+ | 功能描述:直流/直流开关转换器 Track/Sink/Source Synchronous Buck 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 |
| MAX1917EEE+T | 功能描述:直流/直流开关转换器 Track/Sink/Source Synchronous Buck 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 |
| MAX1917EEE-T | 功能描述:直流/直流开关转换器 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 |
| MAX1917EEE-TG068 | 制造商:Rochester Electronics LLC 功能描述: 制造商:Maxim Integrated Products 功能描述: |
| MAX1917EVKIT | 功能描述:电源管理IC开发工具 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 |
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