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参数资料
| 型号： | MAX1706D |
| 厂商： | Maxim Integrated Products, Inc. |
| 英文描述： | BALUN HYBRID 750-950MHZ 1:4 |
| 中文描述： | 1 - 3节电池，大电流，低噪声，升压型DC - DC转换器与线性稳压器 |
| 文件页数： | 9/20页 |
| 文件大小： | 215K |
| 代理商： | MAX1706D |
M
1- to 3-Cell, High-Current, Low-Noise,
Step-Up DC-DC Converters with Linear Regulator
_______________________________________________________________________________________
9
______________________________________________________________Pin Desc ription
Boost DC-DC Converter Power Output. POUT is the source of the P-channel synchronous-rectifier MOSFET
switch. Connect an external Schottky diode from LX to POUT. The output current available from POUT is
reduced by the current drawn from the LDO linear-regulator output.
POUT
16
On Control Input. When ONA = high or
ONB
= low, the IC turns on. Connect ONA to OUT for normal
operation (Table 2).
ONA
15
Off Control Input. When
ONB
= high and ONA = low, the IC is off. Connect
ONB
to GND for normal
operation (Table 2).
ONB
14
Inductor connection to the drains of the P-channel synchronous rectifier and N-channel switch
LX
13
Power Ground for the source of the N-channel power MOSFET switch
PGND
12
Low-Dropout Linear-Regulator Output. LDO sources up to 200mA. Bypass to GND with a 22μF capacitor.
LDO
9
Low-Battery Comparator Output. This open-drain, N-channel output is low when LBP < LBN.
Input hysteresis is 16mV.
LBO
10
Switching-Mode Selection and External-Clock Synchronization Input:
CLK/SEL = low: low-power, low-quiescent-current PFM mode.
CLK/SEL = high: low-noise, high-power PWM mode. Switches at a constant frequency (300kHz). Full
output power is available.
CLK/SEL = driven with an external clock: low-noise, high-power synchronized PWM mode.
Synchronizes to an external clock (from 200kHz to 400kHz).
Turning on the DC-DC converter with CLK/SEL = GND also serves as a soft-start function,
since peak inductor current is reduced.
CLK/SEL
11
Ground
GND
5
Step-Up Converter Feedback Input, used during track mode. IC power and low-dropout linear-regulator
input. Bypass OUT to GND with a 0.1μF ceramic capacitor placed as close to the IC as possible.
OUT
6
Step-Up DC-DC Converter Feedback Input. Connect FB to a resistor voltage divider between POUT and
GND to set the output voltage between 2.5V and 5.5V. FB regulates to 1.233V.
FB
7
Low-Dropout Linear-Regulator Feedback Input. Connect FBLDO to a resistor voltage divider between LDO
to GND to set the output voltage from 1.25V to V
OUT
- 0.3V (5.0V max). FBLDO regulates to 1.250V.
FBLDO
8
Track-Mode Control Input for DC-DC Converter. In track mode, the boost-converter output is sensed at
OUT and set 0.3V above LDO to improve efficiency. Set TRACK to OUT for track mode. Connect TRACK to
GND for normal operation.
TRACK
4
1.250V Reference Output. Bypass REF with a 0.33μF capacitor to GND. REF can source up to 50μA.
REF
3
PIN
Low-Battery Comparator Inverting Input. Common-mode range is 0.5V to 1.5V.
LBN
2
Low-Battery Comparator Noninverting Input. Common-mode range is 0.5V to 1.5V.
LBP
1
FUNCTION
NAME
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| MAX1706EEE | 功能描述:直流/直流开关转换器 1-3 Cell Step-Up w/Linear Regulator 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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| MAX1706EEE-T | 功能描述:直流/直流开关转换器 1-3 Cell Step-Up w/Linear Regulator 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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