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參數(shù)資料
| 型號： | MAX1705 |
| 廠商： | Maxim Integrated Products, Inc. |
| 元件分類： | DC/DC變換器 |
| 英文描述： | 1- to 3-Cell, High-Current, Low-Noise, Step-Up DC-DC Converters with Linear Regulator |
| 中文描述： | 1至3節(jié)電池、大電流、低噪聲、升壓型DC-DC轉(zhuǎn)換器，帶有線性穩(wěn)壓器 |
| 文件頁數(shù)： | 9/20頁 |
| 文件大小： | 215K |
| 代理商： | MAX1705 |
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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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MAX17050EVKIT# | 功能描述:電源管理IC開發(fā)工具 MAX17050 Eval Kit RoHS:否 制造商:Maxim Integrated 產(chǎn)品:Evaluation Kits 類型:Battery Management 工具用于評估:MAX17710GB 輸入電壓: 輸出電壓:1.8 V |
| MAX17050X+ | 制造商:Maxim Integrated Products 功能描述:MODELGAUGE M3 FG WLCSP - Tape and Reel |
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| MAX17058EVKIT# | 功能描述:電源管理IC開發(fā)工具 MAX17058 Eval Kit RoHS:否 制造商:Maxim Integrated 產(chǎn)品:Evaluation Kits 類型:Battery Management 工具用于評估:MAX17710GB 輸入電壓: 輸出電壓:1.8 V |
| MAX17058G+ | 制造商:Maxim Integrated Products 功能描述: 制造商:Maxim Integrated Products 功能描述:MODELGAUGE (1 CELL) TDFN - Rail/Tube |
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