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参数资料
| 型号： | MAX1817EUB+T |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 8/12页 |
| 文件大小： | 0K |
| 描述： | IC REG BOOST 125MA DL 10UMAX |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 2,500 |
| 类型： | 升压（升压） |
| 输出类型： | 两者兼有 |
| 输出数： | 2 |
| 输出电压： | 3.3V 或可调主电源，-28 V ~ 28 V 或可调副电源 |
| 输入电压： | 1.5 V ~ 5.5 V |
| 频率 - 开关： | 500kHz |
| 电流 - 输出： | 125mA |
| 同步整流器： | 无 |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 10-TFSOP，10-MSOP（0.118"，3.00mm 宽） |
| 包装： | 带卷 (TR) |
| 供应商设备封装： | 10-µMAX |
Compact, High-Efficiency, Dual-Output
Step-Up DC-DC Converter
V IN
DUAL-MODE FEEDBACK
ZERO-
CROSSING
DETECTOR
OUT
LX
MAIN
FB
1.25V
ERROR
COMPARATOR
MAIN
CONTROL
LOGIC
MAIN
75mV
AGND
STARTUP
CURRENT
LIMIT
MAIN
ON
OFF
ON
SHUTDOWN
LOGIC
MAIN
UNDERVOLTAGE
GND
LXLCD
LCD
LOCKOUT
ON
OFF
ONLCD
SHUTDOWN
LOGIC
LCD
BIAS
LCD
CONTROL
LOGIC
LCD
1.25V
ERROR
COMPARATOR
AGND
LCD
CURRENT
LIMIT
LCD
MAX1817
GND
FBLCD
AGND
Figure 1. MAX1817 Simplified Functional Diagram
the output voltage rises above the undervoltage thresh-
old, the control circuitry is enabled, allowing proper
regulation of the output voltage.
LCD Step-Up Converter
The MAX1817 ’ s LCD step-up converter generates an
LCD bias voltage up to 28V by use of a 500mA, 1.1 ?
internal N-channel switching MOSFET (Figure 1). The
LCD step-up converter control circuitry is powered from
the main step-up converter output (OUT), so the voltage
at OUT must be above the OUT undervoltage lockout
voltage for the LCD step-up converter to operate.
GND
During startup, the MAX1817 extends the minimum off-
time to 5μs for V FBLCD voltages <0.9V, limiting initial
surge current. The LCD step-up converter features an
independent shutdown control, ONLCD.
The LCD step-up converter features a minimum-off-
time, current-limited control scheme. A pair of one-
shots that set a minimum off-time and a maximum on-
time governs the duty cycle. The switching frequency
can be up to 500kHz and depends upon the load, and
input and output voltages.
8
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX1817EVKIT | 制造商:Maxim Integrated Products 功能描述:COMPACT, HIGH-EFFICIENCY, DUAL-OUTPUT STEP-UP - Bulk |
| MAX1818ESA20 | 制造商:Rochester Electronics LLC 功能描述: 制造商:Maxim Integrated Products 功能描述: |
| MAX1818EUAT25 | 制造商:Maxim Integrated Products 功能描述: |
| MAX1818EUT15 | 制造商:Maxim Integrated Products 功能描述:100MA LOW DROPOUT LINEAR REGULATOR IN HIGH PO - Bulk |
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