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參數(shù)資料
| 型號(hào)： | MAX6331LUR-T |
| 廠商： | MAXIM INTEGRATED PRODUCTS INC |
| 元件分類(lèi)： | 電源管理 |
| 英文描述： | VOLT REGULATOR|FIXED|+5V|TO-236|3PIN|PLASTIC |
| 中文描述： | 1-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO3 |
| 封裝： | SOT-23, 3 PIN |
| 文件頁(yè)數(shù)： | 7/8頁(yè) |
| 文件大?。?/td> | 223K |
| 代理商： | MAX6331LUR-T |
MAX6330/MAX6331
Precision Shunt Regulators with Reset
in SOT23-3
_______________________________________________________________________________________
7
capacitor allows a sharper drop in VSHUNT when the
load transient occurs, and will suffer from a steeper
overshoot when the device re-enters regulation. On the
other hand, the increased compensation on a larger
bypass capacitor will lead to a longer recovery time to
regulation. The Typical Operating Characteristics graph
Overshoot vs. Bypass Capacitance (CL) illustrates this
trade-off.
If the compensation of the bypass capacitor chosen is
insufficient, the output (VSHUNT) can oscillate. Before
choosing a bypass capacitor for the desired shunt cur-
rent, observe the stability boundary conditions indicated
in the Typical Operating Characteristics. The minimum
output capacitance is 0.03F to ensure stability over the
full load-current range.
Adding Hysteresis
In certain circumstances, the MAX6330 can be trapped
in a state that forces it to enter into and exit from a reset
condition indefinitely. This usually occurs in systems
where VSHUNT is just below the device’s trip threshold
and the system draws less quiescent current under reset
conditions than when operating out of reset. The differ-
ence in supply current when the device is in or out of
reset can translate to a significant change in the voltage
drop across RS, which the MAX6330’s built-in hysteresis
may not overcome. A 100k
pull-up resistor will over-
come this condition and add hysteresis (Figure 5).
Note that adding this pull-up resistor to the MAX6330 will
render RESET invalid with VSHUNT < 1V, since this output
loses sinking capability at this point, and the pull-up resis-
tor would invalidate the signal. This does not present a
problem in most applications, since most Ps and other
circuitry are inoperative when VSHUNT is below 1V.
Interfacing to Ps with
Bidirectional Reset Pins
Microprocessors with bidirectional reset pins (such as
the Motorola 68HC11 series) can contend with
MAX6330’s reset output. If, for example, the MAX6330’s
RESET output is asserted high and the P wants to pull
it low, indeterminate logic levels may result. To correct
this, connect a 4.7k
resistor between the RESET out-
put and the P reset I/O (Figure 6). Buffer the RESET
output to other system components. Also, RS must be
sized to compensate for additional current drawn by
the P during the fault condition.
Shunt Current Effects
on VSHUNT and VTH
When sinking large shunt currents, power dissipation
heats the die to temperatures greater than ambient.
This may cause the VSHUNT and VTH tolerances to
approach ±3% at high ambient temperatures and high
shunt currents. Limit the die temperature to less than
+150°C using
ΘJA = 0.25°C/mW.
MAX6330
SHUNT
VIN
RESET
INPUT
RHYST
100k
CL
RS
GND
VCC
GND
P
Figure 5. Adding Hysteresis to the MAX6330
MAX6330
MAX6331
SHUNT
VIN
RESET
(RESET)
TO OTHER SYSTEM
COMPONENTS
CL
4.7k
RS
VSHUNT
GND
VCC
GND
P
( ) ARE FOR MAX6331
Figure 6. Interfacing to Ps with Bidirectional Reset I/O
___________________Chip Information
TRANSISTOR COUNT: 283
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| MAX6331SUR-T | THREE-TERMINAL POSITIVE FIXED VOLTAGE REGULATORS |
| MAX6331TUR-T | VOLT REGULATOR|FIXED|+3.3V|TO-236|3PIN|PLASTIC |
| MAX6330LUR-T | VOLT REGULATOR|FIXED|+5V|TO-236|3PIN|PLASTIC |
| MAX6332UR16D1-T | Voltage Detector |
| MAX6332UR16D2-T | Voltage Detector |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MAX6331SUR | 制造商:Maxim Integrated Products 功能描述:PRECISION SHUNT REGUALTORS WITH POW - Rail/Tube |
| MAX6331SUR+ | 制造商:Maxim Integrated Products 功能描述:PROCESSOR SUPERVISOR 2.78V 3PIN SOT-23 - Rail/Tube |
| MAX6331SUR+T | 功能描述:基準(zhǔn)電壓& 基準(zhǔn)電流 Precision Shunt Regulator w/Reset RoHS:否 制造商:STMicroelectronics 產(chǎn)品:Voltage References 拓?fù)浣Y(jié)構(gòu):Shunt References 參考類(lèi)型:Programmable 輸出電壓:1.24 V to 18 V 初始準(zhǔn)確度:0.25 % 平均溫度系數(shù)（典型值）:100 PPM / C 串聯(lián) VREF - 輸入電壓（最大值）: 串聯(lián) VREF - 輸入電壓（最小值）: 分流電流（最大值）:60 mA 最大工作溫度:+ 125 C 封裝 / 箱體:SOT-23-3L 封裝:Reel |
| MAX6331SUR-T | 功能描述:監(jiān)控電路 RoHS:否 制造商:STMicroelectronics 監(jiān)測(cè)電壓數(shù): 監(jiān)測(cè)電壓: 欠電壓閾值: 過(guò)電壓閾值: 輸出類(lèi)型:Active Low, Open Drain 人工復(fù)位:Resettable 監(jiān)視器:No Watchdog 電池備用開(kāi)關(guān):No Backup 上電復(fù)位延遲（典型值）:10 s 電源電壓-最大:5.5 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:UDFN-6 封裝:Reel |
| MAX6331TUR | 制造商:Maxim Integrated Products 功能描述:PRECISION SHUNT REGUALTORS WITH POW - Cut Tape Product |
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