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| 型号： | MAX1763EEE+T |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 8/18页 |
| 文件大小： | 0K |
| 描述： | IC REG BST SYNC 3.3V/ADJ 16QSOP |
| 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： | 1 |
| 输出电压： | 3.3V，2.5 V ~ 5.5 V |
| 输入电压： | 0.7 V ~ 5.5 V |
| PWM 型： | 混合物 |
| 频率 - 开关： | 1MHz |
| 电流 - 输出： | 1.5A |
| 同步整流器： | 是 |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 16-SSOP（0.154"，3.90mm 宽） |
| 包装： | 带卷 (TR) |
| 供应商设备封装： | 16-QSOP |
1.5A, Low-Noise, 1MHz, Step-Up
DC-DC Converter
Pin Description
PIN
1
2
3
4
5
6
7
8
9
10, 12
11, 14
13, 15
16
—
NAME
ONA
ISET
REF
GND
FB
OUT
AIN
AO
CLK/SEL
PGND
LX
POUT
ONB
EP
FUNCTION
On Control Input. When ONA = high or ONB = low, the IC turns on. Connect ONA to OUT for normal
operation (Table 3).
N-Channel Current Limit Control. For maximum current limit, connect to REF. To reduce current,
supply a voltage between REF and GND by means of a resistive voltage-divider. If soft-start is
desired, connect a capacitor from ISET to GND. When ONA = low and ONB = high, or V REF < 80% of
nominal value, an on-chip switched resistor (100k Ω typ) discharges this pin to GND.
1.250V Voltage Reference Bypass Pin. Connect a 0.22μF ceramic bypass capacitor to GND. Up to
50μA of external REF load current is allowed.
Ground. Connect to PGND with short trace.
DC-DC Converter Feedback Input. To set fixed output voltage of +3.3V, connect FB to ground. For
adjustable output of 2.5V to 5.5V, connect to a resistive divider placed from OUT to GND. FB set
point is 1.245V (Figure 6).
IC Power, Supplied from the Output. Bypass to GND with a 1.0μF ceramic capacitor, and connect to
POUT with a series 4.7 Ω resistor (Figure 2).
Gain-Block Input. The nominal transconductance from AIN to AO is 10mS. An external P-channel
pass device can be used to build a linear regulator. The gain block can also be used as a low-battery
comparator with a threshold of 0.938V. The gain block and its associated quiescent current are
disabled by connecting AIN to OUT.
Gain-Block Output. This open-drain N-channel output sinks current when V AIN < (0.75)(V REF ). AO is
high-Z when the device is shut down, or when AIN = OUT.
Clock Input for the DC-DC Converter. Also serves to program the operating mode of the switcher as
follows:
CLK/SEL = LO: Normal; operates at a fixed frequency, automatically switching to low-power mode if
load is minimized.
CLK/SEL = HI: Forced PWM mode; operates in low-noise, constant-frequency mode at all loads.
CLK/SEL = Clocked: Forced PWM mode with the internal oscillator synchronized to CLK in 500kHz
to 1200kHz range.
Source of N-Channel Power MOSFET Switch. Connect both PGND pins together close to the device.
Inductor Connection. Connect the LX pins together close to the device.
Power Output. P-channel synchronous rectifier source.
Off Control Input. When ONB = high and ONA = low, the IC is off. Connect ONB to GND for normal
operation (Table 3).
Exposed Pad (TSSOP Only). Connect EP to a large ground plane to maximize thermal performance.
Detailed Description
The MAX1763 is a highly-efficient, low-noise power
supply for portable RF and hand-held instruments. It
combines a boost switching regulator, N-channel
power MOSFET, P-channel synchronous rectifier, preci-
sion reference, shutdown control, and a versatile gain
block (Figure 1).
The DC-DC converter boosts a one-cell to three-cell bat-
tery voltage input to a fixed 3.3V or adjustable voltage
between 2.5V and 5.5V. An external Schottky diode is
required for output voltages greater than 4V. The
MAX1763 guarantees startup with an input voltage as
low as 1.1V and remains operational down to an input of
just 0.7V. It is optimized for use in cellular phones and
other applications requiring low noise and low quiescent
current for maximum battery life. It features constant-fre-
quency (1MHz), low-noise PWM operation with up to
1.5A output capability. A CLK input allows frequency
synchronization to control the output noise spectrum.
See Table 1 for typical available output current.
8
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX1763EUE | 功能描述:直流/直流开关转换器 1.5A Low-Noise 1MHz Step-Up 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 |
| MAX1763EUE+ | 功能描述:直流/直流开关转换器 1.5A Low-Noise 1MHz Step-Up 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 |
| MAX1763EUE+T | 功能描述:直流/直流开关转换器 1.5A Low-Noise 1MHz Step-Up 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 |
| MAX1763EUE+TG069 | 制造商:Maxim Integrated Products 功能描述: |
| MAX1763EUE-T | 功能描述:直流/直流开关转换器 1.5A Low-Noise 1MHz Step-Up 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 |
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