OMO ElectronicOMO Electronic
Expand menu
Hello, Sign inMy Account
0 Cart

LT3695EMSE#PBF

P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P21P22-P24P25-P27P28-P30
LT3695 Series
1
3695fa
TYPICAL APPLICATION
DESCRIPTION
1A Fault Tolerant Micropower
Step-Down Regulator
The LT
®
3695 series are adjustable frequency (250kHz to
2.2MHz) monolithic buck switching regulators that accept
input voltages up to 36V and can safely sustain transient
voltages up to 60V. The devices include a high effi ciency
switch, a boost diode, and the necessary oscillator, control
and logic circuitry. Current mode topology is used for fast
transient response and good loop stability. A SYNC pin
allows the user to synchronize the part to an external clock,
and to choose between low ripple Burst Mode operation
and standard PWM operation.
The LT3695 regulators tolerate adjacent pin shorts or
an open pin without raising the output voltage above its
programmed value.
Low ripple Burst Mode operation maintains high effi -
ciency at low output currents while keeping output ripple
below 15mV in a typical application. Shutdown reduces
input supply current to less than 1µA while a resistor and
capacitor on the RUN/SS pin provide a controlled output
voltage ramp (soft-start). Protection circuitry senses the
current in the power switch and external Schottky catch
diode to protect the LT3695 regulators against short-circuit
conditions. Frequency foldback and thermal shutdown
provide additional protection.
The LT3695 series is available in a thermally enhanced
16-pin MSOP package.
5V Step-Down Converter
FEATURES
APPLICATIONS
n
Wide Input Range:
Operation from 3.6V to 36V
Overvoltage Lockout Protects Circuits Through
60V Transients
n
FMEA Fault Tolerant:
Output Stays at or Below Regulation Voltage
During Adjacent Pin Short or When a Pin Is Left
Floating
n
1A Output Current
n
Low Ripple (< 15mV
P-P
) Burst Mode
®
Operation
I
Q
= 75μA for 12V
IN
to 3.3V
OUT
with No Load
n
Adjustable Switching Frequency: 250kHz to 2.2MHz
n
Short-Circuit Protected
n
Synchronizable Between 300kHz and 2.2MHz
n
Output Voltage: 0.8V to 20V
n
Power Good Flag
n
Fixed Output Voltage Versions for 3.3V and 5V Available
n
Small, Thermally Enhanced 16-Pin MSOP Package
n
Automotive Battery Regulation
n
Automotive Entertainment Systems
n
Distributed Supply Regulation
n
Industrial Supplies
Effi ciency
V
IN
BD
LT3695
RUN/SS
V
C
0.22µF
V
OUT
5V
0.9A, V
IN
> 6.9V
1A, V
IN
> 12V
102k
f = 800kHz
536k
10µH
10µF
3695 TA01a
470pF
2.2µF
V
IN
6.9V TO 36V
TRANSIENT TO 60V
RT
PG
40.2k
16.2k
SYNC
BOOSTON OFF
SW
DA
FB
GND PGND
LOAD CURRENT (A)
0
50
EFFICIENCY (%)
60
70
80
90
100
0.2 0.4 0.6 0.8 1
V
OUT
= 5V
V
OUT
= 3.3V
V
IN
= 12V
L = 10μH
f = 800kHz
3695 TA01b
L, LT, LTC, LTM, Burst Mode, Linear Technology and the Linear logo are registered trademarks of
Linear Technology Corporation. All other trademarks are the property of their respective owners.
LT3695 Series
2
3695fa
V
IN
, RUN/SS Voltage (Note 3) ...................................60V
BOOST Pin Voltage ...................................................50V
BOOST Pin Above SW Pin .........................................30V
BD Voltage (LT3695) .................................................30V
RT
, V
C
Voltage ............................................................5V
RT Pin Current .........................................................1mA
SYNC Voltage ............................................................20V
FB Voltage (LT3695) ....................................................5V
ORDER INFORMATION
LEAD FREE FINISH TAPE AND REEL PART MARKING* PACKAGE DESCRIPTION TEMPERATURE RANGE
LT3695EMSE#PBF LT3695EMSE#TRPBF 3695 16-Lead Plastic MSOP –40°C to 125°C
LT3695IMSE#PBF LT3695IMSE#TRPBF 3695 16-Lead Plastic MSOP –40°C to 125°C
LT3695HMSE#PBF LT3695HMSE#TRPBF 3695 16-Lead Plastic MSOP –40°C to 150°C
LT3695EMSE-3.3#PBF LT3695EMSE-3.3#TRPBF 369533 16-Lead Plastic MSOP –40°C to 125°C
LT3695IMSE-3.3#PBF LT3695IMSE-3.3#TRPBF 369533 16-Lead Plastic MSOP –40°C to 125°C
LT3695HMSE-3.3#PBF LT3695HMSE-3.3#TRPBF 369533 16-Lead Plastic MSOP –40°C to 150°C
LT3695EMSE-5#PBF LT3695EMSE-5#TRPBF 36955 16-Lead Plastic MSOP –40°C to 125°C
LT3695IMSE-5#PBF LT3695IMSE-5#TRPBF 36955 16-Lead Plastic MSOP –40°C to 125°C
LT3695HMSE-5#PBF LT3695HMSE-5#TRPBF 36955 16-Lead Plastic MSOP –40°C to 150°C
Consult LTC Marketing for parts specifi ed with wider operating temperature ranges. *The temperature grade is identifi ed by a label on the shipping container.
Consult LTC Marketing for information on non-standard lead based fi nish parts.
For more information on lead free part marking, go to:
http://www.linear.com/leadfree/
For more information on tape and reel specifi cations, go to:
http://www.linear.com/tapeandreel/
ABSOLUTE MAXIMUM RATINGS
(Notes 1, 2)
LT3695 LT3695-3.3, LT3695-5
1
2
3
4
5
6
7
8
PGND
DA
NC
SW
RUN/SS
RT
SYNC
V
IN
16
15
14
13
12
11
10
9
BOOST
BD
GND
PG
NC
FB
NC
V
C
TOP VIEW
17
PGND
MSE PACKAGE
16-LEAD PLASTIC MSOP
θ
JA
= 40°C/W WITH EXPOSED PAD SOLDERED
θ
JA
= 110°C/W WITHOUT EXPOSED PAD SOLDERED
1
2
3
4
5
6
7
8
PGND
DA
NC
SW
RUN/SS
RT
SYNC
V
IN
16
15
14
13
12
11
10
9
BOOST
NC
OUT1
OUT2
GND
PG
NC
V
C
TOP VIEW
MSE PACKAGE
16-LEAD PLASTIC MSOP
17
PGND
θ
JA
= 40°C/W WITH EXPOSED PAD SOLDERED
θ
JA
= 110°C/W WITHOUT EXPOSED PAD SOLDERED
PIN CONFIGURATION
OUT1, OUT2 Voltage (LT3695-3.3, LT3695-5) ...........16V
PG Voltage ................................................................30V
Operating Junction Temperature Range (Notes 4, 5)
LT3695E ............................................. –40°C to 125°C
LT3695I .............................................. –40°C to 125°C
LT3695H ............................................ –40°C to 150°C
Storage Temperature Range ................... –65°C to 150°C
Lead Temperature (Soldering, 10 sec) .................. 300°C
LT3695 Series
3
3695fa
ELECTRICAL CHARACTERISTICS
The l denotes the specifi cations which apply over the full operating
temperature range, otherwise specifi cations are at T
A
= 25°C. V
IN
= 10V, V
RUN/SS
= 10V, unless otherwise noted. (Note 4)
PARAMETER CONDITIONS MIN TYP MAX UNITS
Minimum Operating Voltage (Note 6)
LT3695 V
BD
= 3.3V
V
BD
< 3V
l
l
3.4
3.4
3.6
4.3
V
V
LT3695-3.3 V
OUT1,2
= 3.3V
l
3.4 3.6 V
LT3695-5 V
OUT1,2
= 5V
l
3.4 3.6 V
V
IN
Overvoltage Lockout
l
36 38 39.9 V
Quiescent Current from V
IN
LT3695
V
RUN/SS
= 0.2V V
BD
= 3.3V
V
RUN/SS
= 10V, V
BD
= 3.3V, Not Switching
V
RUN/SS
= 10V, V
BD
= 0V, Not Switching
l
0.01
35
90
0.5
60
160
µA
µA
µA
LT3695-3.3 V
RUN/SS
= 10V, V
OUT1,2
= 3.3V, Not Switching
l
35 60 µA
LT3695-5 V
RUN/SS
= 10V, V
OUT1,2
= 5V, Not Switching
l
35 60 µA
Quiescent Current from BD Pin
LT3695 V
RUN/SS
= 0.2V, V
BD
= 3.3V
V
RUN/SS
= 10V, V
BD
= 3.3V, Not Switching
V
RUN/SS
= 10V, V
BD
= 0V, Not Switching
l
35
0.01
55
0
0.5
100
–5
µA
µA
µA
Quiescent Current from OUT1,2 Pins
LT3695-3.3 V
RUN/SS
= 0.2V
V
RUN/SS
= 10V, V
OUT1,2
= 3.3V, Not Switching
l
5
43
10
65
15
112
µA
µA
LT3695-5 V
RUN/SS
= 0.2V
V
RUN/SS
= 10V, V
OUT1,2
= 5V, Not Switching
l
5
43
10
65
15
112
µA
µA
Minimum BD Pin Voltage: LT3695 2.8 3 V
Feedback Voltage: LT3695
l
792
785
800
800
808
815
mV
mV
FB Pin Bias Current: LT3695 FB Pin Voltage = 800mV
l
–5 –40 nA
Reference Voltage Line Regulation 3.6V < V
IN
< 36V 0.001 0.005 %/V
Output Voltage
LT3695-3.3
l
3.27
3.25
3.3
3.3
3.33
3.35
V
V
LT3695-5
l
4.95
4.925
5
5
5.05
5.075
V
V
Error Amp g
m
I
VC
= ±1.5µA 430 µS
Error Amp Voltage Gain 1300 V/V
V
C
Source Current 50 µA
V
C
Sink Current 50 µA
V
C
Pin to Switch Current Gain 1.25 A/V
V
C
Switching Threshold 0.4 0.6 0.8 V
V
C
Clamp Voltage 2V
Switching Frequency R
RT
= 8.06k
R
RT
= 29.4k
R
RT
= 158k
1.98
0.9
225
2.2
1.0
250
2.42
1.1
275
MHz
MHz
kHz
Minimum Switch Off-Time E- and I-Grades
H-Grade
l
l
130
130
210
250
ns
ns
Switch Current Limit (Note 7) SYNC = 0V
SYNC = 3.3V or Clocked
1.45
1.18
1.7
1.4
2
1.66
A
A
P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P21P22-P24P25-P27P28-P30

LT3695EMSE#PBF

Mfr. #:
Buy LT3695EMSE#PBF
Manufacturer:
Analog Devices / Linear Technology
Description:
Switching Voltage Regulators 36V (60V Transient), 1A (Iout) MicroPower 2.2MHz Step-Down Switching Regulator with 1A Fault Protection in MSOP-16E
Lifecycle:
New from this manufacturer.
Delivery:
DHL FedEx Ups TNT EMS
Payment:
T/T Paypal Visa MoneyGram Western Union

Products related to this Datasheet