參數(shù)資料
型號(hào)： MAX1763
廠商： Maxim Integrated Products, Inc.
元件分類： DC/DC變換器
英文描述： 1.5A, Low-Noise, 1MHz, Step-Up DC-DC Converter
中文描述： 1.5A、低噪聲、1MHz、升壓型DC-DC轉(zhuǎn)換器
文件頁(yè)數(shù)： 9/16頁(yè)
文件大?。?/td> 456K
代理商： MAX1763
noise spectrum. See Table 1 for typical available output
current.
In its normal mode of operation (CLK/SEL = low), the
MAX1763 offers fixed-frequency PWM operation
through most of its load range. At light loads (less than
25% of full load), the device automatically optimizes
efficiency by switching only as needed to supply the
load. Shutdown reduces quiescent current to just 1μA.
Figure 2 shows the standard application circuit for the
MAX1763. (An external Schottky diode is needed for
output voltages greater than 4V, or to assist low-voltage
startup.)
Additional features include synchronous rectification for
high efficiency and increased battery life, and a gain
block that can be used to build a linear regulator using
an external P-channel MOSFET pass device. This gain
M
1.5A, Low-Noise, 1MHz, Step-Up
DC-DC Converter
_______________________________________________________________________________________
9
Figure 1. Functional Diagram
Figure 2. PFM/PWM Automode Connection
GAIN
BLOCK
AO
N
AIN
2.15V
IC POWER
1.25V
DUAL
MODE/
FB
REFERENCE
UNDERVOLTAGE LOCKOUT
STARTUP
OSCILLATOR
1MHz
OSCILLATOR
CONTROLLER
P
N
EN
D
EN
POUT
LX
PGND
OSC
MODE
FB
EN
Q
Q
Q
REF
FB
ISET
GND
CLK/SEL
ON
RDY
REF
0.938V
ONB
ONA
OUT
MAX1763
ISET
GND
PGND
AO
FB
POUT
OUT
AIN
LX
D1
MBR0520L
V
IN
0.7V TO 5.5V
C4
2 x 100
μ
F
OUT
3.3V
L1
1.5
μ
H
REF
CLK/SEL
ONA
ONB
ISET
C3
0.22
μ
F
C2
1.0
μ
F
NOTE:
HEAVY LINES INDICATE HIGH-CURRENT PATHS.
R5
4.7
MAX1763
C1
47
μ
F
Table 1. Typical Available Output Current
NUMBER
OF CELLS
INPUT
VOLTAGE
(V)
OUTPUT
VOLTAGE
(V)
OUTPUT
CURRENT
(mA)
1 NiCd/NiMH
1.2
3.3
675
2.4
3.3
1500
2 NiCd/NiMH
2.4
5.0
950
1 Li+
2.7 (min)
3.3
1300
1 Li+
2.7 (min)
5.0
1100
3 NiCd/NiMH
3.6
5.0
1600
相關(guān)PDF資料
PDF描述
MAX1763EEE 1.5A, Low-Noise, 1MHz, Step-Up DC-DC Converter
MAX1763EUE Replaced by TMS320C6410 : Digital Signal Processors 68-PLCC -40 to 85
MAX1765 Replaced by TMS320C6410 : Digital Signal Processors 68-PLCC -40 to 85
MAX1765EEE 800mA, Low-Noise, Step-Up DC-DC Converter with 500mA Linear Regulator
MAX1765EUE 800mA, Low-Noise, Step-Up DC-DC Converter with 500mA Linear Regulator
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
MAX1763EEE 功能描述:直流/直流開(kāi)關(guān)轉(zhuǎn)換器 1.5A Low-Noise 1MHz Step-Up RoHS:否 制造商:STMicroelectronics 最大輸入電壓:4.5 V 開(kāi)關(guān)頻率:1.5 MHz 輸出電壓:4.6 V 輸出電流:250 mA 輸出端數(shù)量:2 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT
MAX1763EEE+ 功能描述:直流/直流開(kāi)關(guān)轉(zhuǎn)換器 1.5A Low-Noise 1MHz Step-Up RoHS:否 制造商:STMicroelectronics 最大輸入電壓:4.5 V 開(kāi)關(guān)頻率:1.5 MHz 輸出電壓:4.6 V 輸出電流:250 mA 輸出端數(shù)量:2 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT
MAX1763EEE+T 功能描述:直流/直流開(kāi)關(guān)轉(zhuǎn)換器 1.5A Low-Noise 1MHz Step-Up RoHS:否 制造商:STMicroelectronics 最大輸入電壓:4.5 V 開(kāi)關(guān)頻率:1.5 MHz 輸出電壓:4.6 V 輸出電流:250 mA 輸出端數(shù)量:2 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT
MAX1763EEE-T 功能描述:直流/直流開(kāi)關(guān)轉(zhuǎn)換器 1.5A Low-Noise 1MHz Step-Up RoHS:否 制造商:STMicroelectronics 最大輸入電壓:4.5 V 開(kāi)關(guān)頻率:1.5 MHz 輸出電壓:4.6 V 輸出電流:250 mA 輸出端數(shù)量:2 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT
MAX1763EUE 功能描述:直流/直流開(kāi)關(guān)轉(zhuǎn)換器 1.5A Low-Noise 1MHz Step-Up RoHS:否 制造商:STMicroelectronics 最大輸入電壓:4.5 V 開(kāi)關(guān)頻率:1.5 MHz 輸出電壓:4.6 V 輸出電流:250 mA 輸出端數(shù)量:2 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT
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