Electronic Components Datasheet Search
  English  ▼

Delete All
ON OFF
ALLDATASHEET.COM

X  

Preview PDF Download HTML

LT1959 Datasheet(PDF) 2 Page - Linear Technology

Part No. LT1959
Description  4.5A, 500kHz Step-Down Switching Regulator
Download  24 Pages
Scroll/Zoom Zoom In 100% Zoom Out
Maker  LINER [Linear Technology]
Homepage  http://www.linear.com
Logo 

LT1959 Datasheet(HTML) 2 Page - Linear Technology

 
Zoom Inzoom in Zoom Outzoom out
 2 / 24 page
background image
2
LT1959
The q denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at TA = 25°C, TJ = 25°C, VIN = 5V, VC = 1.5V, Boost = VIN + 5V, switch open, unless
otherwise noted.
ABSOLUTE MAXIMUM RATINGS
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
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
CONDITIONS
MIN
TYP
MAX
UNITS
Feedback Voltage (Adjustable)
All Conditions
q
1.19
1.21
1.23
V
Reference Voltage Line Regulation
4.3V
≤ VIN ≤ 15V
0.01
0.03
%/ V
Feedback Input Bias Current
q
–0.5
0
0.5
µA
Error Amplifier Voltage Gain
(Note 2)
200
400
Error Amplifier Transconductance
∆I (VC) = ±10µA
1500
2000
2700
µMho
q
1000
3100
µMho
VC Pin to Switch Current Transconductance
5.3
A/ V
Error Amplifier Source Current
VFB = 1.05V
q
140
225
320
µA
Error Amplifier Sink Current
VFB = 1.35V
q
140
225
320
µA
VC Pin Switching Threshold
Duty Cycle = 0
0.9
V
VC Pin High Clamp
2.1
V
Switch Current Limit
VC Open, VFB = 1.05V, DC ≤ 50%
q
4.5
6
8.5
A
Slope Compensation
DC = 80%
0.8
A
PACKAGE/ORDER INFORMATION
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
VIN
BOOST
GND**
VSW
SYNC
SHDN
VC
FB
R PACKAGE
7-LEAD PLASTIC DD
FRONT VIEW
FB
BOOST
VIN
GND
VSW
7
6
5
4
3
2
1
SHDN
VC
TAB
IS
GND
**WITH (FUSED GND) GROUND PIN
CONNECTED TO GROUND PLANE OR
LARGE LANDS
TJMAX = 150°C, θJA = 30°C/W
WITH PACKAGE SOLDERED TO 0.5 SQUARE INCH
COPPER AREA OVER BACKSIDE GROUND PLANE OR
INTERNAL POWER PLANE.
θJA CAN VARY FROM 20°C/W
TO > 40
°C/W DEPENDING ON MOUNTING TECHNIQUES
TJMAX = 150°C, θJA = 80°C/W


Html Pages

1  2  3  4  5  6  7  8  9  10  11  12  13  14  15  16  17  18  19  20  21  22  23  24 


Datasheet Download




Link URL




Privacy Policy
ALLDATASHEET.COM
Does ALLDATASHEET help your business so far?  [ DONATE ]  

About Alldatasheet   |   Advertisement   |   Datasheet Upload   |   Contact us   |   Privacy Policy   |   Alldatasheet API   |   Link Exchange   |   Manufacturer List
All Rights Reserved© Alldatasheet.com


Mirror Sites
English : Alldatasheet.com  |   English : Alldatasheet.net  |   Chinese : Alldatasheetcn.com  |   German : Alldatasheetde.com  |   Japanese : Alldatasheet.jp
Russian : Alldatasheetru.com  |   Korean : Alldatasheet.co.kr  |   Spanish : Alldatasheet.es  |   French : Alldatasheet.fr  |   Italian : Alldatasheetit.com
Portuguese : Alldatasheetpt.com  |   Polish : Alldatasheet.pl  |   Vietnamese : Alldatasheet.vn