參數(shù)資料
型號： LT1185IQ
廠商： LINEAR TECHNOLOGY CORP
元件分類： 基準電壓源/電流源
英文描述： Cap-Free, NMOS, 150mA Low Dropout Regulator with Reverse Current Protection
中文描述： 2.5 V-25 V ADJUSTABLE NEGATIVE LDO REGULATOR, 1 V DROPOUT, PSSO5
封裝： PLASTIC, D2PAK-5
文件頁數(shù)： 3/16頁
文件大?。?/td> 191K
代理商： LT1185IQ
3
LT1185
1185ff
The
●
denotes specifications which apply over the operating temperature range, otherwise specifications are at T
A
= 25
°
C.
Adjustable version, V
IN
= 7.4V, V
OUT
= 5V, I
OUT
= 1mA, R
LIM
= 4.02k, unless otherwise noted.
PARAMETER
CONDITIONS
Load Regulation (Note 7)
I
OUT
= 5mA to 3A
V
IN
– V
OUT
= 1.5V to 10V, V
OUT
= 5V
Line Regulation (Note 7)
V
IN
– V
OUT
= 1V to 20V, V
OUT
= 5V
Minimum Input Voltage
I
OUT
= 1A (Note 4), V
OUT
= V
REF
I
OUT
= 3A
Internal Current Limit (See Graph for
1.5V
≤
V
IN
– V
OUT
≤
10V
Guaranteed Curve) (Note 12)
V
IN
– V
OUT
= 15V
V
IN
– V
OUT
= 20V
V
IN
– V
OUT
= 30V
MIN
TYP
0.05
MAX
0.3
UNITS
%
0.002
4.0
4.3
3.6
0.01
%/V
V
V
A
A
A
A
A
3.3
3.1
2.0
1.0
0.2
4.2
4.4
4.2
2.6
1.0
●
●
●
●
3.0
1.7
0.4
External Current Limit
Programming Constant
External Current Limit Error
5k
≤
R
LIM
≤
15k, V
OUT
= 1V
(Note 11)
1A
≤
I
LIM
≤
3A
R
LIM
= 15k A/I
LIM
I
OUT
= 5mA, V
OUT
= V
REF
4V
≤
V
IN
≤
25V (Note 5)
V
IN
– V
OUT
= V
SAT
(Note 10)
V
IN
– V
OUT
≥
2V
●
15k
A
0.02 I
LIM
0.04 I
LIM
2.5
0.06 I
LIM
+ 0.03
0.09 I
LIM
+ 0.05
3.5
A
A
●
Quiescent Supply Current
●
mA
Supply Current Change with Load
●
●
25
10
2
40
25
7
mA/A
mA/A
REF Pin Shutoff Current
Thermal Regulation (See Applications
Information)
Reference Voltage Temperature Coefficient
Thermal Resistance Junction to Case
●
0.4
μ
A
V
IN
– V
OUT
= 10V
I
OUT
= 5mA to 2A
(Note 8)
TO-3 Control Area
Power Transistor
TO-220 Control Area
Power Transistor
0.005
0.014
%/W
0.003
0.01
1
3
1
3
%/
°
C
°
C/W
°
C/W
°
C/W
°
C/W
Note 1:
Stresses beyond those listed under Absolute Maximum Ratings
may cause permanent damage to the device. Exposure to any Absolute
Maximum Rating condition for extended periods may affect device
reliability and lifetime.
Note 2:
Reference voltage is guaranteed both at nominal conditions (no
load, 25
°
C) and at worst-case conditions of load, line, power and
temperature. An intermediate value can be calculated by adding the effects
of these variables in the actual application. See the Applications
Information section of this data sheet.
Note 3:
Dropout voltage is tested by reducing input voltage until the
output drops 1% below its nominal value. Tests are done at 0.5A and 3A.
The power transistor looks basically like a pure resistance in this range so
that minimum differential at any intermediate current can be calculated by
interpolation; V
DROPOUT
= 0.25V + 0.25
I
OUT
. For load current less than
0.5A, see graph.
Note 4:
“Minimum input voltage” is limited by base emitter voltage drive
of the power transistor section, not saturation as measured in Note 3. For
output voltages below 4V, “minimum input voltage” specification may limit
dropout voltage before transistor saturation limitation.
Note 5:
Supply current is measured on the ground pin, and does not
include load current, R
LIM
, or output divider current.
Note 6:
The 25W power level is guaranteed for an input-output voltage of
8.3V to 17V. At lower voltages the 3A limit applies, and at higher voltages
the internal power limiting may restrict regulator power below 25W. See
graphs.
Note 7:
Line and load regulation are measured on a pulse basis with a
pulse width of
≈
2ms, to minimize heating. DC regulation will be affected
by thermal regulation and temperature coefficient of the reference. See
Applications Information section for details.
Note 8:
Guaranteed by design and correlation to other tests, but not
tested.
Note 9:
T
JMIN
= 0
°
C for the LT1185C, –40
°
C for LT1185I, and –55
°
C for
the LT1185M. Power transistor area and control circuit area have different
maximum junction temperatures. Control area limits are T
JMAX
= 125
°
C for
the LT1185C and LT1185I and 150
°
C for the LT1185M. Power area limits
are 150
°
C for LT1185C and LT1185I and 175
°
C for LT1185M.
Note 10:
V
SAT
is the maximum specified dropout voltage;
0.25V + 0.25 I
OUT
.
Note 11:
Current limit is programmed with a resistor from REF pin to GND
pin. The value is 15k/I
LIM
.
Note 12:
For V
IN
– V
OUT
= 1.5V; V
IN
= 5V, V
OUT
= 3.5V. V
OUT
= 1V for all
other current limit tests.
ELECTRICAL CHARACTERISTICS
相關PDF資料
PDF描述
LT1185C Cap-Free, NMOS, 150mA Low Dropout Regulator with Reverse Current Protection
LT1185CT 9-Bit Odd/Even Parity Generators/Checkers 14-SOIC 0 to 70
LT1185I 9-Bit Odd/Even Parity Generators/Checkers 14-SOIC 0 to 70
LT1185IT 9-Bit Odd/Even Parity Generators/Checkers 14-SOIC 0 to 70
LT1185M 9-Bit Odd/Even Parity Generators/Checkers 14-SOIC 0 to 70
相關代理商/技術參數(shù)
參數(shù)描述
LT1185IQ#PBF 功能描述:IC REG LDO NEG ADJ 3A 5-DD RoHS:是 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - 線性 系列:- 標準包裝:1 系列:- 穩(wěn)壓器拓撲結構:正，固定式 輸出電壓:8V 輸入電壓:10.5 V ~ 23 V 電壓 - 壓降（標準）:1.7V @ 40mA 穩(wěn)壓器數(shù)量:1 電流 - 輸出:100mA（最小值） 電流 - 限制（最?。?- 工作溫度:0°C ~ 125°C 安裝類型:表面貼裝 封裝/外殼:8-SOIC（0.154"，3.90mm 寬） 供應商設備封裝:8-SOIC 包裝:剪切帶 (CT) 產(chǎn)品目錄頁面:1075 (CN2011-ZH PDF) 其它名稱:296-24390-1
LT1185IQ#PBF 制造商:Linear Technology 功能描述:VOLTAGE REGULATOR LDO ADJ 3 制造商:Linear Technology 功能描述:VOLTAGE REGULATOR, LDO, ADJ, 3A, TO-263-
LT1185IQ#TR 制造商:Linear Technology 功能描述:LDO Regulator Neg/Pos -2.5V to -25V2.5V to 25V 3A 6-Pin(5+Tab) DDPAK T/R
LT1185IQ#TRPBF 功能描述:IC REG LDO NEG ADJ 3A 5-DD RoHS:是 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - 線性 系列:- 標準包裝:1 系列:- 穩(wěn)壓器拓撲結構:正，固定式 輸出電壓:3V 輸入電壓:2.3 V ~ 5.5 V 電壓 - 壓降（標準）:0.035V @ 150mA 穩(wěn)壓器數(shù)量:2 電流 - 輸出:150mA 電流 - 限制（最?。?300mA 工作溫度:-40°C ~ 125°C 安裝類型:表面貼裝 封裝/外殼:6-UFDFN 裸露焊盤，6-TMLF? 供應商設備封裝:6-TMLF?（1.6x1.6） 包裝:Digi-Reel® 產(chǎn)品目錄頁面:1104 (CN2011-ZH PDF) 其它名稱:576-3018-6
LT1185IT 功能描述:IC REG LDO NEG ADJ 3A TO220 RoHS:否 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - 線性 系列:- 標準包裝:1 系列:- 穩(wěn)壓器拓撲結構:正，固定式 輸出電壓:3V 輸入電壓:2.3 V ~ 5.5 V 電壓 - 壓降（標準）:0.035V @ 150mA 穩(wěn)壓器數(shù)量:2 電流 - 輸出:150mA 電流 - 限制（最?。?300mA 工作溫度:-40°C ~ 125°C 安裝類型:表面貼裝 封裝/外殼:6-UFDFN 裸露焊盤，6-TMLF? 供應商設備封裝:6-TMLF?（1.6x1.6） 包裝:Digi-Reel® 產(chǎn)品目錄頁面:1104 (CN2011-ZH PDF) 其它名稱:576-3018-6
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