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| 型号： | MAX1760HETB+T |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 10/14页 |
| 文件大小： | 0K |
| 描述： | IC REG BST SYNC 3.3V/ADJ 10TDFN |
| 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： | 800mA |
| 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： | 10-WFDFN 裸露焊盘 |
| 包装： | 带卷 (TR) |
| 供应商设备封装： | 10-TDFN-EP（3x3） |
0.8A, Low-Noise, 1MHz,
Step-Up DC-DC Converter
Table 3. Component Selection Guide
PRODUCTION METHOD
INDUCTORS
TOKO type D52LC
TOKO type D518LC
CAPACITORS
AVX TPS series
Kemet T510 series
DIODES
EIC SB series
Motorola MBR0520L
Surface mount
Sumida CDRH5D18
Sumida CDRH4D28
Sanyo POSCAP series
—
—
—
Table 4. Component Suppliers
SUPPLIER PHONE
External Diode
For output voltages greater than 4V, an external
Schottky diode must be connected from LX to POUT, in
AVX
EIC
Kemet
Motorola
Sumida
TOKO
USA: 843-448-9411
USA: 916-941-0712
USA: 810-287-2536
USA: 408-629-4789
Japan: 81-45-474-7030
USA: 847-956-0666
Japan: 011-81-3-3667-3302
USA: 847-297-0070
parallel with the on-chip synchronous rectifier (Figure
6). The diode should be rated for 0.5A. Representative
devices are Motorola MBR0520L, Nihon EP05Q03L, or
generic 1N5817. This external diode is also recom-
mended for applications that must start with input volt-
ages at or below 1.8V. The Schottky diode carries
current during startup and after the synchronous rectifi-
er turns off; thus, its current rating only needs to be
500mA. Connect the diode as close to the IC as possi-
ble. Do not use ordinary rectifier diodes; their slow
Note: Please indicate that you are using the MAX1760 when
contacting these component suppliers.
switching speeds and long reverse-recovery times ren-
der them unacceptable. For circuits that do not require
startup with inputs below 1.8V and have an output of 4V
or less, no external diode is needed.
time constant is:
t SS = R SS C SS
where R SS ≥ 470k ? .
Placing a capacitor across the lower resistor of the cur-
rent-limiting resistive divider provides both current-limit
and soft-start features simultaneously (Figures 4 and 5).
Inductor Selection
Input and Output Filter Capacitors
Choose input and output filter capacitors that will ser-
vice the input and output peak currents with accept-
able voltage ripple. Choose input capacitors with
working voltage ratings over the maximum input volt-
The MAX1760’s high switching frequency allows the
use of a small 3.3μH surface-mount inductor. The cho-
sen inductor should generally have a saturation current
rating exceeding the N-channel switch current limit;
however, it is acceptable to bias the inductor current
into saturation by as much as 20% if a slight reduction
in efficiency is acceptable. Lower current-rated induc-
tors may be used if ISET is employed to reduce the
V IN = 0.7V
TO VOUT
33 μ F
3.3 μ H
CLK/SEL
ON
MAX1760
ISET
LX
POUT
MRB0520L
4.7 ?
V OUT
100 μ F
peak inductor current (see the Setting the Switch
Current Limit and Soft-Start section). For high efficien-
cy, choose an inductor with a high-frequency ferrite
0.22 μ F
REF
PGND GND
OUT
FB
0.68 μ F
core material to reduce core losses. To minimize radiat-
ed noise, use a toroid or shielded inductor. See Table 3
for suggested components and Table 4 for a list of
component suppliers. Connect the inductor from the
battery to the LX pin as close to the IC as possible.
Figure 6. Connection with External Schottky Diode for Output
Voltages Greater than 4V, or to Assist Low-Voltage Startup
10
______________________________________________________________________________________
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX1760HEUB | 功能描述:直流/直流开关转换器 0.8A 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 |
| MAX1760HEUB+ | 功能描述:直流/直流开关转换器 0.8A 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 |
| MAX1760HEUB+T | 功能描述:直流/直流开关转换器 0.8A 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 |
| MAX1760HEUB-T | 功能描述:直流/直流开关转换器 0.8A 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 |
| MAX17611GTL+ | 制造商:Maxim Integrated Products 功能描述:IMVP7 CPU AND GRAPHICS CONTROLLER - Rail/Tube |
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