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参数资料
| 型号： | MAX765EPA+ |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 8/12页 |
| 文件大小： | 0K |
| 描述： | IC REG INV -12V/ADJ 0.12A 8DIP |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 50 |
| 类型： | 反相 |
| 输出类型： | 两者兼有 |
| 输出数： | 1 |
| 输出电压： | -12V，-1 V ~ -16 V |
| 输入电压： | 3 V ~ 16 V |
| 频率 - 开关： | 300kHz |
| 电流 - 输出： | 120mA |
| 同步整流器： | 无 |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 通孔 |
| 封装/外壳： | 8-DIP（0.300"，7.62mm） |
| 包装： | 管件 |
| 供应商设备封装： | 8-PDIP |
-5V/-12V/-15V or Adjustable,
High-Efficiency, Low I Q DC-DC Inverters
FB
COMPARATOR
REF
MAX764
MAX765
SHDN
ERROR
MAX766
COMPARATOR
OUT
V+
N
1.5V
REFERENCE
V+
Q
TRIG
ONE-SHOT
FROM V+
S
Q
P
TRIG
ONE-SHOT
Q
R
CURRENT
COMPARATOR
FROM OUT
LX
0.2V
0.1V
CURRENT
CONTROL CIRCUITS
(FULL
CURRENT)
(HALF
CURRENT)
FROM V+
GND
Figure 1. Block Diagram
_______________Detailed Description
Operating Principle
The MAX764/MAX765/MAX766 are BiCMOS, inverting,
switch-mode power supplies that provide fixed outputs
of -5V, -12V, and -15V, respectively; they can also be
set to any desired output voltage using an external
resistor divider. Their unique control scheme combines
the advantages of pulse-frequency modulation (pulse
skipping) and pulse-width modulation (continuous puls-
ing). The internal P-channel power MOSFET allows
peak currents of 0.75A, increasing the output current
capability over previous pulse-frequency-modulation
(PFM) devices. Figure 1 shows the MAX764/MAX765/
MAX766 block diagram.
The MAX764/MAX765/MAX766 offer three main
improvements over prior solutions:
1) They can operate with miniature (less than 5mm
diameter) surface-mount inductors, because of their
300kHz switching frequency.
2) The current-limited PFM control scheme allows efficien-
cies exceeding 80% over a wide range of load currents.
3) Maximum quiescent supply current is only 120μA.
Figures 2 and 3 show the standard application circuits
for these devices. In these configurations, the IC is
powered from the total differential voltage between the
input (V+) and output (V OUT ). The principal benefit of
this arrangement is that it applies the largest available
signal to the gate of the internal P-channel power MOS-
FET. This increased gate drive lowers switch on-resis-
tance and increases DC-DC converter efficiency.
Since the voltage on the LX pin swings from V+ (when the
switch is ON) to I V OUT I plus a diode drop (when the
8
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX765EPA+ | 功能描述:直流/直流开关调节器 5/12/15/AdjV DC/DC Inverter 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 |
| MAX765ESA | 功能描述:直流/直流开关调节器 5/12/15/AdjV DC/DC Inverter 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 |
| MAX765ESA+ | 功能描述:直流/直流开关调节器 5/12/15/AdjV DC/DC Inverter 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 |
| MAX765ESA+T | 功能描述:直流/直流开关调节器 5/12/15/AdjV DC/DC Inverter 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 |
| MAX765ESA-T | 功能描述:直流/直流开关调节器 5/12/15/AdjV DC/DC Inverter 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 |
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