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參數(shù)資料
| 型號： | MAX6329 |
| 廠商： | Maxim Integrated Products, Inc. |
| 元件分類： | 運動控制電子 |
| 英文描述： | 1.45-W Mono Class-D Audio Amplifier with 1.8V Compatible Shutdown Voltage (TPA2006) 8-SON -40 to 85 |
| 中文描述： | 150mA、SOT23封裝、低壓差線性穩(wěn)壓器，內(nèi)置微處理器復(fù)位電路 |
| 文件頁數(shù)： | 8/11頁 |
| 文件大?。?/td> | 237K |
| 代理商： | MAX6329 |
M
logic low on
MR
asserts reset while the regulator is still
within tolerance.
Reset remains asserted while
MR
is low and for the
reset timeout period (100ms min) after
MR
returns high.
The
MR
input has an internal pullup of 20k
(typ) to
OUT. This input can be driven with TTL/CMOS logic
levels or with open-drain/collector outputs. Connect a
normally open momentary switch from
MR
to GND to
create a manual reset function; external debounce cir-
cuitry is not required. If
MR
is driven from long cables
or the device is used in a noisy environment, connect a
0.1μF capacitor from
MR
to GND to provide additional
noise immunity.
Reverse Leakage Protection
An internal circuit monitors the input and output volt-
ages. When the output voltage is greater than the input
voltage, the internal pass transistor and parasitic
diodes turn off. OUT powers the device. There is no
leakage path from OUT to IN. Therefore, the output can
be powered from an auxiliary supply such as a backup
battery without any need for additional blocking diodes.
Current Limit
The MAX6329/MAX6349 include a current limiter that
monitors and controls the pass transistor
’
s gate voltage,
limiting the output current to 350mA (typ). The output can
be shorted to ground for an indefinite period without
damaging the part.
Thermal Overload Protection
When the junction temperature exceeds T
J
= +160
°
C,
the thermal sensor signals the shutdown logic, turning
off the pass transistor and allowing the IC to cool. The
thermal sensor will turn the pass transistor on again
after the IC
’
s junction temperature cools by 20
°
C,
resulting in a pulsed output during continuous thermal-
overload conditions. Thermal overload protection is
designed to protect the MAX6329/MAX6349 in the
event of fault conditions. For continuous operation, do
not exceed the absolute maximum junction temperature
rating of T
J
= +150
°
C.
Operating Region and Power Dissipation
The MAX6329/MAX6349s
’
maximum power dissipation
depends on the thermal resistance of the case and cir-
cuit board, the temperature difference between the die
junction and the ambient air, and the rate of airflow.
The power dissipation across the device is:
P = I
OUT
(V
IN
- V
OUT
)
The maximum power dissipation is:
P
MAX
= (T
J
- T
A
) / (
θ
JB
+
θ
BA
)
where T
J
- T
A
is the temperature difference between the
die junction and the surrounding air,
θ
JB
(or
θ
JC
) is the
thermal resistance of the package, and
θ
BA
is the ther-
mal resistance through the printed circuit board, copper
traces, and other materials to the surrounding air.
The MAX6329/MAX6349s
’
ground pin (GND) performs
the dual function of providing an electrical connection
to the system ground and channeling heat away.
Connect GND to the system ground using a large pad
or ground plane.
Applications Information
Output Voltage Selection
The MAX6329/MAX6349 feature dual mode operation:
they operate in either a preset voltage mode or an
adjustable mode. In preset voltage mode, internal
feedback resistors set the MAX6329/MAX6349 to
+3.3V, +2.5V, or +1.8V (see
Selector Guide
). Select this
mode by connecting SET to ground. In adjustable
mode, select an output between 1.23V to 5.0V using
two external resistors connected as a voltage divider to
SET (Figure 1). The output voltage is set by the following
equation:
V
OUT
= V
SET
(1 + R1/R2)
where V
SET
= 1.23V. To simplify resistor selection:
R1 = R2 (V
OUT
/V
SET
- 1)
Choose R2
≥
100k
to optimize power consumption,
accuracy, and high-frequency power-supply rejection.
Since the V
SET
tolerance is typically less than ±30mV,
the output can be set using fixed resistors instead of
variable resistors. In preset voltage mode, impedance
between SET and ground should be less than 50k
.
150mA, SOT23, Low Dropout Linear Regulators
with Internal Microprocessor Reset Circuit
8
_______________________________________________________________________________________
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MAX6329SH | 制造商:MAXIM 制造商全稱:Maxim Integrated Products 功能描述:150mA, SOT23, Low-Dropout Linear Regulators with Internal Microprocessor Reset Circuit |
| MAX6329SHUT | 制造商:Maxim Integrated Products 功能描述:150MA SOT23 LOW-DROPOUT LINEAR RE - Cut Tape Product |
| MAX6329SHUT+ | 制造商:Maxim from Components Direct 功能描述:MAXIM MAX6329SHUT+, LOW-DROPOUT (LDO) VOLTAGE REGULATORS - Tape and Reel 制造商:Maxim Integrated Products 功能描述:REG LDO LIN ADJ/FIX POS 1.23V TO 5V/3.3V 0.15A 6PIN SOT-23 - Rail/Tube 制造商:Maxim 功能描述:Maxim MAX6329SHUT+, Low-Dropout (LDO) Voltage Regulator 3.3V 25uA 6-pin SOT23 |
| MAX6329SHUT+T | 功能描述:低壓差穩(wěn)壓器 - LDO 150mA LDO w/Int MPU Reset Circuit RoHS:否 制造商:Texas Instruments 最大輸入電壓:36 V 輸出電壓:1.4 V to 20.5 V 回動電壓（最大值）:307 mV 輸出電流:1 A 負載調(diào)節(jié):0.3 % 輸出端數(shù)量: 輸出類型:Fixed 最大工作溫度:+ 125 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:VQFN-20 |
| MAX6329SHUT-T | 功能描述:低壓差穩(wěn)壓器 - LDO RoHS:否 制造商:Texas Instruments 最大輸入電壓:36 V 輸出電壓:1.4 V to 20.5 V 回動電壓（最大值）:307 mV 輸出電流:1 A 負載調(diào)節(jié):0.3 % 輸出端數(shù)量: 輸出類型:Fixed 最大工作溫度:+ 125 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:VQFN-20 |
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