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參數(shù)資料
| 型號： | MAX1765EUE+ |
| 廠商： | Maxim Integrated |
| 文件頁數(shù)： | 15/19頁 |
| 文件大?。?/td> | 867K |
| 描述： | IC REG DL BST/LINEAR 16TSSOP |
| 產(chǎn)品培訓模塊： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 標準包裝： | 96 |
| 拓撲： | 升壓（升壓）同步（1），線性（LDO）（1） |
| 功能： | 任何功能 |
| 輸出數(shù)： | 2 |
| 頻率 - 開關： | 1MHz |
| 電壓/電流 - 輸出 1： | 2.5 V ~ 5.5 V，800mA |
| 電壓/電流 - 輸出 2： | 2.85V/可調(diào)，500mA |
| 帶 LED 驅(qū)動器： | 無 |
| 帶監(jiān)控器： | 無 |
| 帶序列發(fā)生器： | 無 |
| 電源電壓： | 0.7 V ~ 5.5 V |
| 工作溫度： | -40°C ~ 85°C |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 16-TSSOP（0.173"，4.40mm）裸露焊盤 |
| 供應商設備封裝： | 16-TSSOP-EP |
| 包裝： | 管件 |
Implement soft-start by placing a resistor from ISET to
REF and a capacitor from ISET to GND (Figure 8). In
shutdown, ISET is discharged to GND through an
on-chip 100k﹔esistor. At power-up, ISET is 0V and the
current limit is zero. As the capacitor voltage rises, the
current limit increases and the output voltage rises. The
soft-start time constant is:
Placing a capacitor across the lower resistor of the cur-
rent-limiting resistive divider provides both features
simultaneously (Figure 9).
Package Selection
The MAX1765 is available in two packages, a 16-pin
QSOP and a thermally enhanced TSSOP-EP. The
QSOP is the less expensive of the two packages, and
requires a less complex layout design. This layout
allows the designer to route underneath the device. The
power dissipation for the QSOP is 0.7W.
The TSSOP-EP comes with an exposed metal pad that
is connected to the substrate of the IC. This increases
the power dissipation up to 1.5W for the TSSOP-EP. To
achieve maximum power capability, the exposed pad
of the TSSOP-EP should be reflowed to a pad with low
thermal resistance. For convenience, this pad can be
connected to AGND or PGND.
Inductor Selection
The MAX1765s high switching frequency allows the
use of a small surface-mount inductor. For most appli-
cations, a 3.3礖 inductor works well. The inductor
t =
RISE
R C
SS SS
800mA, Low-Noise, Step-Up DC-DC Converter
with 500mA Linear Regulator
Figure 4. Dual-Output Power Supply
MAX1765
INPUT
0.7V TO 5.5V
GND CLK/SEL FBL PGND
OUTL
POUT
LX
OUT
REF
ILIM
4.7?/DIV>
0.68糉 150k
V
LDO
= 2.85V
FB
33糉 x 2
3.3糎
TRACK
ONL
ONB
ONA
OFF
ON
ON
OFF
TRACK
TRACK = LOW, V
OUT
= 5.0V
TRACK = HIGH, V
OUT
= 3.35V
0.22糉
50k
4.7糉
INL
Figure 5. LDO Enable Allows True Boost Shutdown
LX
POUT
INL
OUTL
OUTPUT
INPUT
MAX1765
ONL
ONA
SHDN
ON
OFF
FBL
R3
R4
Figure 6. PFET Allows True Boost Shutdown
LX
POUT
FB
OUT
OUTPUT
INPUT
MAX1765
SHDN
ONB
OFF
ON
______________________________________________________________________________________ 15
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相關代理商/技術參數(shù) |
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| MAX1765EUE+ | 功能描述:直流/直流開關轉(zhuǎn)換器 800mA Step-Up w/500mA Linear Reg RoHS:否 制造商:STMicroelectronics 最大輸入電壓:4.5 V 開關頻率: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 安裝風格:SMD/SMT |
| MAX1765EUE+T | 功能描述:直流/直流開關轉(zhuǎn)換器 800mA Step-Up w/500mA Linear Reg RoHS:否 制造商:STMicroelectronics 最大輸入電壓:4.5 V 開關頻率: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 安裝風格:SMD/SMT |
| MAX1765EUE-T | 功能描述:直流/直流開關轉(zhuǎn)換器 800mA Step-Up w/500mA Linear Reg RoHS:否 制造商:STMicroelectronics 最大輸入電壓:4.5 V 開關頻率: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 安裝風格:SMD/SMT |
| MAX1765EVKIT | 功能描述:直流/直流開關轉(zhuǎn)換器 Evaluation Kit for the MAX1765 RoHS:否 制造商:STMicroelectronics 最大輸入電壓:4.5 V 開關頻率: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 安裝風格:SMD/SMT |
| MAX176ACPA | 功能描述:模數(shù)轉(zhuǎn)換器 - ADC Integrated Circuits (ICs) RoHS:否 制造商:Texas Instruments 通道數(shù)量:2 結(jié)構(gòu):Sigma-Delta 轉(zhuǎn)換速率:125 SPs to 8 KSPs 分辨率:24 bit 輸入類型:Differential 信噪比:107 dB 接口類型:SPI 工作電源電壓:1.7 V to 3.6 V, 2.7 V to 5.25 V 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:VQFN-32 |
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