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参数资料
| 型号： | MAX1735EUK50-T |
| 厂商： | Maxim Integrated |
| 文件页数： | 7/10页 |
| 文件大小： | 0K |
| 描述： | IC REG LDO -5V/ADJ .2A SOT23-5 |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 2,500 |
| 稳压器拓扑结构： | 负固定式或可调式 |
| 输出电压： | -5V，-1.25 V ~ -5.5 V |
| 输入电压： | -2.5 V ~ -6.5 V |
| 电压 - 压降（标准）： | 0.08V @ 200mA |
| 稳压器数量： | 1 |
| 电流 - 输出： | 200mA（最小） |
| 电流 - 限制（最小）： | 1.02A |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | SC-74A，SOT-753 |
| 供应商设备封装： | SOT-23-5 |
| 包装： | 带卷 (TR) |
200mA, Negative-Output, Low-Dropout
Linear Regulator in SOT23
-5.5V TO -1.25V
-6.5V TO -2.5V
INPUT
-5.0V,-3.0V, OR -2.5V
FIXED
OUTPUT
-6.5V TO -2.5V
INPUT
IN
OUT
ADJUSTABLE
OUTPUT
C IN
1 μ F CERAMIC
IN
OUT
C OUT
1 μ F CERAMIC
C IN
1 μ F CERAMIC
MAX1735
R1
C OUT
1 μ F
CERAMIC
MAX1735
ON
GND
ON
OFF
ON
SHDN
SET
GND
OFF
ON
SHDN
GND
SET
GND
R2
Figure 2. Typical Application Circuit with Preset Output Voltage
V OUT = V SET
( 1 + R1 R2 )
Figure 3. Typical Application Circuit with Adjustable Output
V OUT SET ? 1 + ?
= V
? R 2 ? ?
R 1 = R 2 ? ? OUT ? ? 1 ?
In adjustable mode, an output voltage between -5.5V and
-1.25V is selected using two external resistors connected
as a voltage-divider from OUT to SET (Figure 3). The out-
put voltage is determined by the following equation:
? ? R 1 ? ?
? ?
?
where V SET = V REFERENCE = -1.25V when in regulation.
Since the input bias current at SET is <100nA, use
large resistance values for R1 and R2 to minimize
power consumption in the feedback network. A typical
value of 100k ? for R2 is acceptable for most applica-
tions. Higher values consume less current at the
expense of output voltage accuracy. The above equa-
tion solved for R1 is:
? ?
? ? V ? ?
? ? V SET ? ?
For preset output voltage mode, connect SET directly
to GND.
Shutdown
In shutdown, the N-channel MOSFET, control circuitry,
reference, and all internal circuits are turned off, reduc-
ing supply current to typically 1nA. SHDN can be dri-
ven by either a positive or negative voltage. Drive
SHDN above +1.6V or below -1.6V to turn the regulator
on. To turn the regulator off, drive SHDN to GND. For
always-on operation, connect SHDN to IN. By including
a positive threshold at SHDN , it can be driven by a
standard 5V TTL level without needing level-shifting cir-
cuitry.
Voltage
Current Limiting
The MAX1735 features a current limit that protects the
regulator. Short-circuit output current is typically
515mA. The output will withstand a short to ground
indefinitely; however, if the increased power dissipation
heats the die to +160 ° C, the thermal overload protec-
tion will shut off the regulator, preventing damage to the
IC.
Thermal Overload Protection
The thermal overload protection circuit protects the reg-
ulator against overheating due to prolonged overload
conditions. When the die temperature exceeds +160 ° C,
an on-chip thermal sensor disables the pass transistor,
allowing the IC to cool. The thermal sensor reenables
the pass MOSFET once the die temperature drops
15 ° C. A continuous short-circuit fault condition results in
a cyclical enabling and disabling of the output.
Thermal overload protection is designed to safeguard
the MAX1735 in the event of overload fault conditions.
For normal operation, do not exceed the absolute maxi-
mum junction temperature rating of +150 ° C. Junction
temperature is greater than ambient by an amount
depending on package heat dissipation and the ther-
mal resistance from the junction to ambient ( θ JA ):
T JUNCTION = T AMBIENT + ( θ JA )(P DISSIPATION )
where
θ JA for the 5-pin SOT23 is about 0.140 ° C/mW.
_______________________________________________________________________________________
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX1735EUK-C71086 | 制造商:Rochester Electronics LLC 功能描述: 制造商:Maxim Integrated Products 功能描述: |
| MAX1736ETT42+T | 功能描述:电池管理 1Cell Li+ Battery Charger RoHS:否 制造商:Texas Instruments 电池类型:Li-Ion 输出电压:5 V 输出电流:4.5 A 工作电源电压:3.9 V to 17 V 最大工作温度:+ 85 C 最小工作温度:- 40 C 封装 / 箱体:VQFN-24 封装:Reel |
| MAX1736EUT | 制造商:Maxim Integrated Products 功能描述:SOT23 SINGLE-CELL LI+ BATTERY CHAR - Rail/Tube |
| MAX1736EUT+T | 功能描述:电池管理 RoHS:否 制造商:Texas Instruments 电池类型:Li-Ion 输出电压:5 V 输出电流:4.5 A 工作电源电压:3.9 V to 17 V 最大工作温度:+ 85 C 最小工作温度:- 40 C 封装 / 箱体:VQFN-24 封装:Reel |
| MAX1736EUT41 | 制造商:Maxim Integrated Products 功能描述:SOT23 SINGLE-CELL LI+ BATTERY CHAR - Cut Tape Product |
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