LT1339ISW#PBF Linear Technology, LT1339ISW#PBF Datasheet

IC DC/DC CONTROLLER HIPWR 20SOIC

LT1339ISW#PBF

Manufacturer Part Number
LT1339ISW#PBF
Description
IC DC/DC CONTROLLER HIPWR 20SOIC
Manufacturer
Linear Technology
Type
Step-Up (Boost)r
Datasheet

Specifications of LT1339ISW#PBF

Internal Switch(s)
No
Synchronous Rectifier
Yes
Number Of Outputs
1
Current - Output
65mA
Frequency - Switching
150kHz
Voltage - Input
Up to 60V
Operating Temperature
-40°C ~ 85°C
Mounting Type
Surface Mount
Package / Case
20-SOIC (7.5mm Width)
Primary Input Voltage
60V
No. Of Outputs
1
Output Voltage
54V
Output Current
65mA
No. Of Pins
20
Operating Temperature Range
-40°C To +85°C
Msl
MSL 1 - Unlimited
Rohs Compliant
Yes
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Voltage - Output
-
Power - Output
-

Available stocks

Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
LT1339ISW#PBFLT1339ISW
Manufacturer:
LINEAR/凌特
Quantity:
20 000
Company:
Part Number:
LT1339ISW#PBF
Manufacturer:
LINEAR/凌特
Quantity:
20 000
Company:
Part Number:
LT1339ISW#PBF
0
Company:
Part Number:
LT1339ISW#PBFLT1339ISW#TRPBF
Manufacturer:
LINEAR/凌特
Quantity:
20 000
FEATURES
APPLICATIONS
TYPICAL
+
48V Telecom Power Supplies
Personal Computers and Peripherals
Distributed Power Converters
Industrial Control Systems
Lead-Acid Battery Backup Systems
Automotive and Heavy Equipment
High Voltage: Operation Up to 60V
High Current: Dual N-Channel Synchronous Drive
Handles Up to 10,000pF Gate Capacitance
Programmable Average Load Current Limiting
5V Reference Output with 10mA External
Loading Capability
Programmable Fixed Frequency Synchronizable
Current Mode Operation Up to 150kHz
Undervoltage Lockout with Hysteresis
Programmable Start Inhibit for Power Supply
Sequencing and Protection
Adaptive Nonoverlapping Gate Drive Prevents
Shoot-Through
C
1 F
5VREF
C
VC
, 1nF
0.1 F
C
R
REF
1k
FB2
R
10k
+
CT
C
2200pF
C
SS
CT
APPLICATION
R
, 1 F
VC
, 10k
2200pF
C
AVG
U
SYNC
5V
CT
SL/ADJ
I
SS
V
SGND
V
V
AVG
C
FB
REF
28V to 5V 20A Buck Converter
REF
LT1339
R
3k
RUN/SHDN
FB1
SENSE
SENSE
V
PHASE
U
BOOST
PGND
12V
TG
BG
TS
IN
+
+
R
100k
RUN
CBST
1 F
L1 = CTX02-13400-X2
IN5819
DBST
D1
MBR0520
D2
MBR0520
+
The LT
switching regulator controller. The IC drives dual
N-channel MOSFETs to create a single IC solution for high
power DC/DC converters in applications up to 60V.
The LT1339 incorporates programmable average current
limiting, allowing accurate limiting of DC load current
independent of inductor ripple current. The IC also incor-
porates user-adjustable slope compensation for minimi-
zation of magnetics at duty cycles up to 90%.
The LT1339 timing oscillator operating frequency is pro-
grammable and can be synchronized up to 150kHz. Mini-
mum off-time operation provides main switch protection.
The IC also incorporates a soft start feature that is gated by
both shutdown and undervoltage lockout conditions.
An output phase reversal pin allows flexibility in configu-
ration of converter types, including inverting and negative
topologies.
DESCRIPTION
C
47 F
12V
12VIN
, LTC and LT are registered trademarks of Linear Technology Corporation.
IRL3103D2
2
28V
V
®
IN
IRL3803
1339 is a high power synchronous current mode
High Power Synchronous
+
+
R
0.005
L1
10 H
S
C
2200 F
6.3V
C
1500 F
63V
IN
OUT
2
3
U
DC/DC Controller
V
5V AT 20A
OUT
1339 TA03
100
90
80
70
60
50
0
28V to 5V Efficiency
5
OUTPUT CURRENT (A)
10
LT1339
sn1339 1339fas
15
1339 TA03a
1
20

Related parts for LT1339ISW#PBF

LT1339ISW#PBF Summary of contents

Page 1

... The IC also incorporates a soft start feature that is gated by both shutdown and undervoltage lockout conditions. An output phase reversal pin allows flexibility in configu- ration of converter types, including inverting and negative topologies. , LTC and LT are registered trademarks of Linear Technology Corporation DBST 28V IN5819 ...

Page 2

LT1339 BSOLUTE (Note 1) Supply Voltages Power Supply Voltage (12V )...............– 0.3V to 20V IN Topside Supply Voltage (V BOOST V – 0. 20V ( MAX Topside Reference ...

Page 3

ELECTRICAL C HARA TERISTICS C 12V = V = 12V 2V 0V BOOST C SYMBOL PARAMETER Error Amplifier V Error Amplifier Reference Voltage FB I Feedback Input Current FB g Error Amplifier Transconductance m ...

Page 4

LT1339 W U TYPICAL PERFORMANCE CHARACTERISTICS Boost Supply Current vs Temperature 4.0 3.5 3.0 2.5 2.0 1.5 1.0 50 100 125 –50 – TEMPERATURE ( C) 1339 G01 I Shutdown Current vs 12VIN Temperature 190 180 170 ...

Page 5

W U TYPICAL PERFORMANCE CHARACTERISTICS Soft Start Charge Current vs Temperature –50 – 100 125 TEMPERATURE ( C) 1339 G10 Bottom Gate Transition Times vs Bottom Gate Capacitance 160 ...

Page 6

LT1339 W U TYPICAL PERFORMANCE CHARACTERISTICS UVLO Thresholds vs Temperature 10.00 9.75 RISING 9.50 9.25 9.00 FALLING 8.75 8.50 8.25 8.00 – –50 100 TEMPERATURE ( C) 1339 G18 RUN/SHDN Input Current vs Pin Voltage 800 ...

Page 7

PIN FUNCTIONS SYNC (Pin 1): Oscillator Synchronization Pin with TTL- Level Compatible Input. Input drives internal rising edge triggered one-shot; sync signal on/off times should (10 100kHz). Does not contain ...

Page 8

LT1339 CTIO AL BLOCK DIAGRA V IN MAIN SWITCH SYNC SWITCH SL/ADJ SENSE R SENSE SENSE V OUT + 0 REF 5V 5V REF REFERENCE RUN/SHDN 1.25V U OPERATION (Refer ...

Page 9

U OPERATION (Refer to Functional Block Diagram) The current comparator trip threshold is set on the V which is the output of a transconductance amplifier, or error amplifier (EA). The error amplifier integrates the difference between a feedback voltage (on ...

Page 10

LT1339 U U APPLICATIONS INFORMATION R Selection for Output Current SENSE R generates a voltage that is proportional to the SENSE inductor current for use by the LT1339 current sense amplifier. The value based on the required ...

Page 11

U U APPLICATIONS INFORMATION impedance of the I pin. The integrator corner fre- AVG quency is typically set orders of magnitude below the oscillator frequency and follows the relation: – (3.2)(10 )/C –3dB AVG ...

Page 12

LT1339 U U APPLICATIONS INFORMATION the converter input supply is enabled with no voltage on the LT1339 12V pin, the LT1339 driver output clamps IN will not be activated. To prevent turn-on, an external current path must be used to ...

Page 13

U U APPLICATIONS INFORMATION Subharmonic oscillations can be eliminated by augment- ing the increasing ripple current slope (S1) in the control loop. This is accomplished by adding an artificial ramp on the inductor current waveform internal to the IC (with ...

Page 14

LT1339 U U APPLICATIONS INFORMATION further increasing the effective compensation slope up to 20% for a given setting. Design Example 20V 15V (DC = 0.75) OUT R = 0.01 SENSE f = 100kHz O L ...

Page 15

U U APPLICATIONS INFORMATION In high voltage applications (V > 20V), the topside switch IN is required to slew very large voltages transition losses increase through a square relation, until it becomes the dominant power loss term in ...

Page 16

LT1339 U U APPLICATIONS INFORMATION is also small. However, since the FET gate must switch up past the 48V input voltage, transition loss can become a significant factor. In such a case often prudent to take 2 the ...

Page 17

U TYPICAL APPLICATIONS LT1339 sn1339 1339fas 17 ...

Page 18

LT1339 U TYPICAL APPLICATIONS 18 RTOP RMID COMP GND-S V GND PGND SGND REF V MURS120 SENSE AVG – I SL/ADJ SENSE + CT TS REF 5V TG SYNC BOOST V EFFICIENCY sn1339 1339fas ...

Page 19

... DIMENSION DOES NOT INCLUDE INTERLEAD FLASH. INTERLEAD FLASH SHALL NOT EXCEED 0.010" (0.254mm) PER SIDE Information furnished by Linear Technology Corporation is believed to be accurate and reliable. However, no responsibility is assumed for its use. Linear Technology Corporation makes no represen- tation that the interconnection of its circuits as described herein will not infringe on existing patent rights. ...

Page 20

... Good for Full-Bridge Applications IN Smooth Operation at High Duty Cycle (95% to 100%) Excellent for 50A Drives Synchronous N-Channel MOSFETs Tight 1% Reference High Side Current Sense 60V Input LT/TP 0299 2K REV A • PRINTED IN THE USA LINEAR TECHNOLOGY CORPORATION 1997 sn1339 1339fas ...

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