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参数资料
| 型号： | MAX8515EXK+T |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 6/10页 |
| 文件大小： | 0K |
| 描述： | IC VREF SHUNT ADJ SC705 |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 2,500 |
| 基准类型： | 分流器，可调式 |
| 输出电压： | 0.2 V ~ 18 V |
| 容差： | ±1% |
| 输入电压： | 1.7 V ~ 28 V |
| 通道数： | 1 |
| 电流 - 阴极： | 4mA |
| 电流 - 输出： | 20mA |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 6-TSSOP（5 引线），SC-88A，SOT-353 |
| 供应商设备封装： | SC-70-5 |
| 包装： | 带卷 (TR) |
Wide-Input 0.6V Shunt Regulators for
Isolated DC-to-DC Converters
Overvoltage Protection
V REG
1.8V
V+
MAX5003
INPUT
SUPPLY
Figure 4 shows an isolated OVP circuit. R1 limits the
current supplied to the photodiode. R2 limits the
MAX8515A/MAX8515 input current. R3 and R4 set the
trip threshold for the OVP. C1 is the input supply
decoupling capacitor.
R1
47k ?
NDRV
PGND
CON
Values for R3 and R4 are chosen based on the needed
OVP threshold. For example, a trip threshold of 25%
above the rated output voltage is needed for an OVP
circuit. The values of R3 can be determined from the
following equation once R4 is chosen; 10k ? is recom-
mended for R4. Then, R3 = 6.2k ? .
C1
0.1 μ F
IN
MAX8515A
MAX8515
PGND
GND
OUT
FB
R3
20k ?
1%
C2
0.1 μ F
R2
C3
C4
? V ?
R3 = ? OVP - 1 ? × R 4
? V FB ?
where V OVP = 0.8V x 1.25 for the given example.
Linear Regulator
Use an external pass transistor in conjunction with the
R4
10k ?
1%
MAX8515A/MAX8515 to create a linear regulator as
shown in Figure 5. Determine the output voltage of the
regulator by:
V REG = 0 . 6 V × ? 1 +
?
Figure 3. MAX8515A/MAX8515 Typical Application Circuit,
Opto-Feedback Circuit
?
?
R2 ?
R3 ?
Choose R1 to maintain load regulation up to a 2A load.
Use the following equation:
6V TO 10V
V IN_MIN REG BE
R1
1.2k ?
FEEDBACK
R1 =
-V -V
I O_MAX
×β
OPTOCOUPLER
R2
2k ?
C1
0.1 μ F
16V
IN
MAX8515A
MAX8515
PGND
GND
OUT
FB
DC-DC OUTPUT
0.8V
R3
6.2k ?
1%
where I O_MAX is the rated maximum output current,
which is 2A in this application circuit. V REG is the output
voltage of the linear regulator. V BE is the base-to-emitter
forward voltage of Q1, and β is the minimum current gain
of Q1 at rated load current. V IN is the minimum input volt-
age at IN. For the typical application circuit, V IN_MIN =
2.375V, V REG = 1.0V, V BE = 0.65V, and β = 180. Choose
R1 = 15 ? for fast transient response. C1 is the input
decoupling capacitor and C2 is the compensation
R4
10k ?
1%
capacitor. Use a 1μF, 6.3V capacitor for this application.
Figure 6 shows a typical load-regulation curve for the cir-
cuit in Figure 5. This circuit does not provide short-circuit,
overcurrent, or overtemperature protection.
Figure 4. MAX8515A/MAX8515 Typical Application Circuit,
OVP Circuit (Set to 1V OVP Threshold for 0.8V Nominal Output)
6
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| MAX8515EZK-T | 功能描述:基准电压& 基准电流 RoHS:否 制造商:STMicroelectronics 产品:Voltage References 拓扑结构:Shunt References 参考类型:Programmable 输出电压:1.24 V to 18 V 初始准确度:0.25 % 平均温度系数（典型值）:100 PPM / C 串联 VREF - 输入电压（最大值）: 串联 VREF - 输入电压（最小值）: 分流电流（最大值）:60 mA 最大工作温度:+ 125 C 封装 / 箱体:SOT-23-3L 封装:Reel |
| MAX8516EUB | 功能描述:低压差稳压器 - LDO RoHS:否 制造商:Texas Instruments 最大输入电压:36 V 输出电压:1.4 V to 20.5 V 回动电压（最大值）:307 mV 输出电流:1 A 负载调节:0.3 % 输出端数量: 输出类型:Fixed 最大工作温度:+ 125 C 安装风格:SMD/SMT 封装 / 箱体:VQFN-20 |
| MAX8516EUB/GG8 | 制造商:Maxim Integrated Products 功能描述:1.425V TO 3.6V INPUT, 1A, 0.2V DROPOUT LDO RE - Bulk |
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