參數(shù)資料
型號(hào)： TC1070VCT
廠商： TelCom Semiconductor, Inc.
元件分類(lèi)： DC/DC變換器
英文描述： RS-S_D(Z) Series - Econoline Regulated DC-DC Converters; Input Voltage (Vdc): 48V; Output Voltage (Vdc): 05V; Power: 2W; 2:1 and 4:1 Wide Input Voltage Ranges; 1kVDC, 2kVD & 3kVDC Isolation; UL94V-0 Package Material; Continuous Short Circuit Protection; Low Noise; No External Capacitor needed; Efficiency to 83%
中文描述： 50mA的可調(diào)式CMOS LDO穩(wěn)壓器具有關(guān)斷
文件頁(yè)數(shù)： 10/12頁(yè)
文件大?。?/td> 117K
代理商： TC1070VCT
TC1071
4
100mA ADJUSTABLE CMOS
LDO WITH SHUTDOWN
PRELIMINARY INFORMATION
TC1071-01
6/13/97
Output Capacitor
A 1
μ
F (min) capacitor from V
OUT
to ground is recom-
mended. The output capacitor should have an effective
series resistance of 5
or less, and a resonant frequency
above 1MHz. A 1
μ
F capacitor should be connected from V
IN
to GND if there is more than 10 inches of wire between the
regulator and the AC filter capacitor, or if a battery is used as
the power source. Aluminum electrolytic or tantalum capaci-
tor types can be used. (Since many aluminum electrolytic
capacitors freeze at approximately – 30
°
C, solid tantalums
are recommended for applications operating below – 25
°
C.)
When operating from sources other than batteries, supply-
noise rejection and transient response can be improved by
increasing the value of the input and output capacitors and
employing passive filtering techniques.
Thermal Considerations
Thermal Shutdown
Integrated thermal protection circuitry shuts the regula-
tor off when die temperature exceeds 160
°
C. The regulator
remains off until the die temperature drops to approximately
150
°
C.
Power Dissipation
The amount of power the regulator dissipates is prima-
rily a function of input and output voltage, and output current.
The following equation is used to calculate worst case
actualpower dissipation:
P
D
≈
(V
INMAX
– V
OUTMIN
)I
LOADMAX
Where:
P
D
= Worst case actual power dissipation
V
INMAX
= Maximum voltage on V
IN
V
OUTMIN
= Minimum regulator output voltage
I
LOADMAX
= Maximum output (load) current
Equation 2.
The maximum allowable power dissipation (Equation 3)
is a function of the maximum ambient temperature (T
AMAX
),
the maximum allowable die temperature (125
°
C) and the
thermal resistance from junction-to-air (
θ
JA
). SOT-23A-5
package has a
θ
JA
of approximately 220
°
C/Wattwhen
mounted on a single layer FR4 dielectric copper clad PC
board.
P
D MAX
= (T
JMAX
– T
AMAX)
θ
JA
Where all terms are previously defined.
Equation 3.
DETAILED DESCRIPTION
The TC1071 is a precision fixed output voltage regula-
tor. (If a fixed version is desired, please see the TC1014 or
TC1015 data sheets.) Unlike the bipolar regulators, the
TC1071 supply current does not increase with load current.
In addition, V
OUT
remains stable and within regulation at
very low load currents (an important consideration in RTC
and CMOS RAM battery back-up applications).
Figure 1 shows a typical application circuit. The regula-
tor is enabled any time the shutdown input (SHDN) is at or
above V
IH
, and shutdown (disabled) when SHDN is at or
below V
IL
. SHDN may be controlled by a CMOS logic gate,
or I/O port of a microcontroller. If the SHDN input is not
required, it should be connected directly to the input supply.
While in shutdown, supply current decreases to 0.05
μ
A
(typical) and V
OUT
falls to zero volts.
Adjust Input
The output voltage setting is determined by the values
of R1 and R2 (Figure 1). The ohmic values of these resistors
should be between 470K and 3M to minimize bleeder
current.
The output voltage setting is calculated using the follow-
ing equation.
V
OUT
= V
x
R1 + 1
]
R2
Equation 1.
The voltage adjustment range of the TC1071 is from
V
REF
to (V
IN
– 0.05V). If so desired, a small capacitor (100pF
to 0.01
μ
F) may be added to the ADJ input to further reduce
output noise.
Figure 1. 2.45 Battery-Operated Supply
C2
1
μ
F
Shutdown Control
(from Power Control Logic)
TC1071
V
IN
1
2
3
4
R2
2.2M
R1
2.2M
+2.45V
5
V
OUT
ADJ
SHDN
GND
3.0V
BATTERY
C1
1
μ
F
相關(guān)PDF資料
PDF描述
TC1072-3.0VCH 50mA CMOS LDO WITH SHUTDOWN, ERROR OUTPUT AND VREF BYPASS
TC1072-30VCH 50mA and 100mA CMOS LDOs with Shutdown, ERROR Output and VREF Bypass
TC1072-40VCH 50mA and 100mA CMOS LDOs with Shutdown, ERROR Output and VREF Bypass
TC1072-50VCH 50mA and 100mA CMOS LDOs with Shutdown, ERROR Output and VREF Bypass
TC1072-28VCH RS-S_D(Z) Series - Econoline Regulated DC-DC Converters; Input Voltage (Vdc): 48V; Output Voltage (Vdc): 05V; Power: 2W; 2:1 and 4:1 Wide Input Voltage Ranges; 1kVDC, 2kVD & 3kVDC Isolation; UL94V-0 Package Material; Continuous Short Circuit Protection; Low Noise; No External Capacitor needed; Efficiency to 83%
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
TC1070VCT713 功能描述:低壓差穩(wěn)壓器 - LDO 50mA Adj 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(dòng)電壓（最大值）:307 mV 輸出電流:1 A 負(fù)載調(diào)節(jié):0.3 % 輸出端數(shù)量: 輸出類(lèi)型:Fixed 最大工作溫度:+ 125 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:VQFN-20
TC1071 制造商:MICROCHIP 制造商全稱(chēng):Microchip Technology 功能描述:50mA, 100mA and 150mA Adjustable CMOS LDOs with Shutdown
TC1071VCT 制造商:MICROCHIP 制造商全稱(chēng):Microchip Technology 功能描述:50mA, 100mA and 150mA Adjustable CMOS LDOs with Shutdown
TC1071VCT713 功能描述:低壓差穩(wěn)壓器 - LDO .1mA Adj LDO w/Shtdn 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(dòng)電壓（最大值）:307 mV 輸出電流:1 A 負(fù)載調(diào)節(jié):0.3 % 輸出端數(shù)量: 輸出類(lèi)型:Fixed 最大工作溫度:+ 125 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:VQFN-20
TC1072 制造商:TELCOM 制造商全稱(chēng):TelCom Semiconductor, Inc 功能描述:50mA CMOS LDO WITH SHUTDOWN, ERROR OUTPUT AND VREF BYPASS
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