參數(shù)資料
型號(hào): LT1959I
廠商: Linear Technology Corporation
元件分類: 基準(zhǔn)電壓源/電流源
英文描述: RADIATION HARDENED HIGH EFFICIENCY, 5 AMP SWITCHING REGULATORS
中文描述: 抗輻射高效,5安培開關(guān)穩(wěn)壓器
文件頁數(shù): 2/24頁
文件大?。?/td> 292K
代理商: LT1959I
2
LT1959
The
G
denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T
A
= 25
°
C, T
J
= 25
°
C, V
IN
= 5V, V
C
= 1.5V, Boost = V
IN
+ 5V, switch open, unless
otherwise noted.
ABSOLUTE
AXI
U
RATIU
W
Input Voltage .......................................................... 16V
BOOST Voltage ........................................................ 30V
BOOST Pin Above Input Voltage............................. 15V
SHDN Pin Voltage..................................................... 7V
FB Pin Voltage ....................................................... 3.5V
FB Pin Current ....................................................... 1mA
W
W
SYNC Pin Voltage ..................................................... 7V
Operating Junction Temperature Range
LT1959C................................................0
°
C to 125
°
C
LT1959I........................................... –40
°
C to 125
°
C
Storage Temperature Range................ –65
°
C to 150
°
C
Lead Temperature (Soldering, 10 sec)................. 300
°
C
ELECTRICAL CHARACTERISTICS
PARAMETER
Feedback Voltage (Adjustable)
Reference Voltage Line Regulation
Feedback Input Bias Current
Error Amplifier Voltage Gain
Error Amplifier Transconductance
CONDITIONS
All Conditions
4.3V
V
IN
15V
MIN
1.19
TYP
1.21
0.01
0
400
2000
MAX
1.23
0.03
0.5
UNITS
G
V
%/V
μ
A
G
–0.5
200
1500
1000
(Note 2)
I (V
C
) =
±
10
μ
A
2700
3100
μ
Mho
μ
Mho
A/V
G
V
C
Pin to Switch Current Transconductance
Error Amplifier Source Current
Error Amplifier Sink Current
V
C
Pin Switching Threshold
V
C
Pin High Clamp
Switch Current Limit
Slope Compensation
5.3
225
225
0.9
2.1
6
0.8
V
FB
= 1.05V
V
FB
= 1.35V
Duty Cycle = 0
G
140
140
320
320
μ
A
μ
A
V
V
A
A
G
V
C
Open, V
FB
= 1.05V, DC
50%
DC = 80%
G
4.5
8.5
PACKAGE/ORDER I
FOR
ATIO
W
U
U
ORDER PART
NUMBER
ORDER PART
NUMBER
LT1959CR
LT1959IR
1959
1959I
S8 PART MARKING
LT1959CS8
LT1959IS8
(Note 1)
1
2
3
4
8
7
6
5
TOP VIEW
S8 PACKAGE
8-LEAD PLASTIC SO
V
IN
BOOST
GND**
V
SW
SYNC
SHDN
V
C
FB
R PACKAGE
7-LEAD PLASTIC DD
FRONT VIEW
FB
BOOST
V
IN
GND
V
SW
SHDN
V
C
7
6
5
4
3
2
1
TAB
IS
GND
**WITH (FUSED GND) GROUND PIN
CONNECTED TO GROUND PLANE OR
LARGE LANDS
T
= 150
°
C,
θ
= 30
°
C/W
WITH PACKAGE SOLDERED TO 0.5 SQUARE INCH
COPPER AREA OVER BACKSIDE GROUND PLANE OR
INTERNAL POWER PLANE.
θ
CAN VARY FROM 20
°
C/W
TO >40
°
C/W DEPENDING ON MOUNTING TECHNIQUES
T
JMAX
= 150
°
C,
θ
JA
= 80
°
C/W
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