参数资料
型号: MAX1685EEE+
厂商: Maxim Integrated Products
文件页数: 12/14页
文件大小: 0K
描述: IC REG BUCK SYNC 3.3V/ADJ 16QSOP
产品培训模块: Lead (SnPb) Finish for COTS
Obsolescence Mitigation Program
标准包装: 100
类型: 降压(降压)
输出类型: 两者兼有
输出数: 1
输出电压: 3.3V,1.25 V ~ 14 V
输入电压: 2.7 V ~ 14 V
PWM 型: 电流模式
频率 - 开关: 600kHz
电流 - 输出: 1A
同步整流器:
工作温度: -40°C ~ 85°C
安装类型: 表面贴装
封装/外壳: 16-SSOP(0.154",3.90mm 宽)
包装: 管件
供应商设备封装: 16-QSOP
产品目录页面: 1410 (CN2011-ZH PDF)
Low-Noise, 14V Input, 1A, PWM
Step-Down Converters
capacitors have the lowest ESR of the high-value elec-
trolytic types. Use ceramic and OS-CON capacitors for
very compact, high-reliability, or wide-temperature
applications, where expense is justified. When using
very low ESR capacitors, such as ceramic or OS-CON,
check for stability while examining load-transient
response, and increase the output compensation
capacitor if needed. Table 3 lists suppliers for the vari-
ous components used with the MAX1684/MAX1685.
Ensure that the minimum capacitance value and maxi-
mum ESR values are met:
where I OUT MAX = 1A, AC Load Reg ? 1.4%, and
f OSC = 300kHz (MAX1684) or 600kHz (MAX1685).
Output Diode Selection
Use a 1A external Schottky diode (MBRS130LT3 or
equivalent) for the output rectifier to pass inductor cur-
rent during the start of the second half of each cycle.
This diode operates before the internal N-channel
MOSFET completely turns on and during high-current
operation. Use a Schottky diode to avoid forward bias-
ing the internal body diode of the N-channel MOSFET.
C OUT > I OUT MAX / (V OUT ? AC Load Reg ? f OSC )
R ESR < 2 ? AC Load Reg ? V OUT /I OUT MAX
Table 2. Inductor and Minimum Output Capacitor Selection
MAX1684 (300kHz)
MAX1685 (600kHz)
V OUT
(V)
1.25 to 2.7
2.7 to 4
4 to 6
6 to 14
L
(μH)
22
22
47
68
MIN C OUT
(μF)
220
100
68
47
L
(μH)
10
10
22
33
MIN C OUT
(μF)
100
47
33
22
Table 3. Component Suppliers
SUPPLIER
CAPACITORS
AVX
Matsuo
PHONE
803-946-0690
714-969-2591
FAX
803-626-3123
714-960-6492
V IN
22 μ F
0.1 μ F
0.1 μ F
AIN
IN
MAX1684
MAX1685
LX
MBRS
130LT3
L R1
C1
-V OUT
-1.25V
TO -5.5V
100 μ F
Sanyo
619-661-6835
619-661-1055
CVH
Sprague
INDUCTORS
Coilcraft
Murata-Erie
603-224-1961
847-639-6400
814-237-1431
603-224-1430
847-639-1469
814-238-0490
1 μ F
0.1 μ F
SHDN
STBY
CVL
SYNC/PWM
REF
ILIM/SS
FB
BOOT
PGND
AGND
R2
Sumida
847-956-0666
847-956-0702
CC
TDK
847-390-4373
847-390-4428
0.01 μ F
0.01 μ F
DIODES
(
-V OUT = -1.25V R1 + 1
Motorola
602-303-5454
602-994-6430
V IN , MAX = 14V - | V OUT |
R2
)
Figure 4. Inverting Output
12
______________________________________________________________________________________
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MAX1685EEE+T 功能描述:直流/直流开关转换器 14V 1A PWM Step-Down Converter 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
MAX1685EEE-T 功能描述:直流/直流开关转换器 14V 1A PWM Step-Down Converter 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
MAX1685EVKIT 功能描述:电源管理IC开发工具 Evaluation Kit for the MAX1684 MAX1685 RoHS:否 制造商:Maxim Integrated 产品:Evaluation Kits 类型:Battery Management 工具用于评估:MAX17710GB 输入电压: 输出电压:1.8 V
MAX1686EUA 功能描述:电荷泵 3-5V Regulating Chrg Pump For SIM Cards RoHS:否 制造商:Maxim Integrated 功能:Inverting, Step Up 输出电压:- 1.5 V to - 5.5 V, 3 V to 11 V 输出电流:100 mA 电源电流:1 mA 最大工作温度:+ 70 C 封装 / 箱体:SOIC-8 Narrow 封装:Tube