Peak Output Current ................................100mA
Operating Junction Temperature Range
(Note 2).................................................. –40°C to 125°C
Junction Temperature (Note 3) ............................. 125°C
Storage Temperature Range .................. –65°C to 150°C
Lead Temperature (Soldering, 10 sec)
GN Package ...................................................... 300°C
pin conFiguraTion
TOP VIEW
MODE/PLLIN
SENSE1
+
SENSE1
–
SENSE1
+
RUN1
FREQ
RUN1
SW1
TG1
1
2
3
4
5
6
7
8
9
11
12
28 FREQ
27 MODE/PLLIN
26 SW1
25 TG1
24 BOOST1
23 BG1
22 V
IN
21 INTV
CC
20 BG2
19 PGND
18 BOOST2
17 TG2
16 SW2
15 PGOOD
TK/SS1 1
I
TH1
2
V
FB1
3
V
FB2
4
I
TH2
5
TK/SS2 6
SENSE2
–
7
SW1
28 27 26 25 24 23
SENSE1
–
1
TK/SS1 2
I
TH1
3
V
FB1
4
V
FB2
5
I
TH2
6
TK/SS2 7
SENSE2
–
8
9 10 11 12 13 14
RUN2
PGOOD
SENSE2
+
EXTV
CC
SW2
I
LIM
SGND
29
22 BOOST1
21 BG1
20 V
IN
19 INTV
CC
18 BG2
17 PGND
16 BOOST2
15 TG2
SENSE1
–
28 27 26 25 24 23 22
21 BOOST1
20 BG1
SGND
29
19 V
IN
18 INTV
CC
17 BG2
16 PGND
15 BOOST2
8
SENSE2
+
9 10 11 12 13 14
RUN2
PGOOD
EXTV
CC
SW2
I
LIM
TG2
V
FB1
TK/SS1
I
TH1
SGND
I
TH2
TK/SS2
SENSE2
–
V
FB2
10
SENSE2
+
RUN2 13
EXTV
CC
14
UFD PACKAGE
28-LEAD (4mm
×
5mm) PLASTIC QFN
T
JMAX
= 125°C,
θ
JA
= 34°C/W,
EXPOSED PAD (PIN 29) IS SGND, MUST BE
SOLDERED TO PCB
GN PACKAGE
28-LEAD PLASTIC SSOP
UF PACKAGE
28-LEAD (4mm
×
4mm) PLASTIC QFN
T
JMAX
= 125°C,
θ
JA
= 80°C/W
T
JMAX
= 125°C,
θ
JA
= 37°C/W,
θ
JC
= 2.6°C/W
EXPOSED PAD (PIN 29) IS SGND, MUST BE
SOLDERED TO PCB
orDer inForMaTion
LEAD FREE FINISH
LTC3869EUF#PBF
LTC3869IUF#PBF
LTC3869EUFD#PBF
LTC3869IUFD#PBF
LTC3869IGN-2#PBF
TAPE AND REEL
LTC3869EUF#TRPBF
LTC3869IUF#TRPBF
LTC3869EUFD#TRPBF
LTC3869IUFD#TRPBF
LTC3869IGN-2#TRPBF
PART MARKING*
3869
3869
3869
3869
LTC3869GN-2
PACKAGE DESCRIPTION
28-Lead (4mm
×
4mm) Plastic QFN
28-Lead (4mm
×
4mm) Plastic QFN
28-Lead (4mm
×
5mm) Plastic QFN
28-Lead (4mm
×
5mm) Plastic QFN
28-Lead Narrow Plastic SSOP
TEMPERATURE RANGE
–40°C to 125°C
–40°C to 125°C
–40°C to 125°C
–40°C to 125°C
–40°C to 125°C
Consult LTC Marketing for parts specified with wider operating temperature ranges. *The temperature grade is identified by a label on the shipping container.
Consult LTC Marketing for information on nonstandard lead based finish parts.
For more information on lead free part marking, go to:
http://www.linear.com/leadfree/
For more information on tape and reel specifications, go to:
http://www.linear.com/tapeandreel/
38692fb
2
For more information
www.linear.com/LTC3869
TG1
SENSE1
+
MODE/PLLIN
TOP VIEW
TOP VIEW
RUN1
FREQ
LTC3869/LTC3869-2
elecTrical characTerisTics
SYMBOL
V
IN
V
OUT
V
FB1,2
I
FB1,2
V
REFLNREG
V
LOADREG
g
m1,2
I
Q
DF
MAX
UVLO
UVLO
HYS
V
OVL
I
SENSE
I
TK/SS1,2
V
RUN1,2
PARAMETER
Input Voltage Range
Output Voltage Range
Regulated Feedback Voltage
(Notes 2, 4)
Feedback Current
Reference Voltage Line Regulation
Output Voltage Load Regulation
I
TH1,2
Voltage = 1.2V, 0°C to 85°C
I
TH1,2
Voltage = 1.2V, –40°C to 125°C
(Note 4)
V
IN
= 4.0V to 38V (Note 4)
(Note 4)
Measured in Servo Loop; ∆I
TH
Voltage = 1.2V to 0.7V
l
Measured in Servo Loop; ∆I
TH
Voltage = 1.2V to 1.6V
l
I
TH1,2
= 1.2V; Sink/Source 5µA; (Note 4)
(Note 5)
V
IN
= 15V
V
RUN1,2
= 0V
In Dropout
V
INTVCC
Ramping Down
Measured at V
FB1,2
(Each Channel); V
SENSE1,2
= 3.3V
V
TK/SS1,2
= 0V
V
RUN1
, V
RUN2
Rising
V
FB1,2
= 0.5V, V
SENSE1,2
= 3.3V, I
LIM
= 0V
V
FB1,2
= 0.5V, V
SENSE1,2
= 3.3V, I
LIM
= Float
V
FB1,2
= 0.5V, V
SENSE1,2
= 3.3V, I
LIM
= INTV
CC
V
FB1,2
= 0.5V, V
SENSE1,2
= 3.3V, I
LIM
= 0V
V
FB1,2
= 0.5V, V
SENSE1,2
= 3.3V, I
LIM
= Float
V
FB1,2
= 0.5V, V
SENSE1,2
= 3.3V, I
LIM
= INTV
CC
V
FB1,2
= 0.5V, V
SENSE1,2
= 3.3V, LTC3869IGN-2
I
LIM
= Float
(Note 8)
C
LOAD
= 3300pF
C
LOAD
= 3300pF
(Note 8)
C
LOAD
= 3300pF
C
LOAD
= 3300pF
25
25
25
25
30
30
90
l
l
l
The
l
denotes the specifications which apply over the full operating
junction temperature range, otherwise specifications are at T
A
= 25°C (Note 2). V
IN
= 15V, V
RUN1,2
= 5V unless otherwise noted.
CONDITIONS
MIN
4
0.6
0.5955
0.5940
0.600
0.600
–15
0.002
0.01
–0.01
2
3
30
94
3.0
0.64
1.0
1.1
25
45
68
23
43
68
40
95
3.2
0.6
l
l
l
l
TYP
MAX
38
12.5
0.6045
0.6060
–50
0.01
0.1
–0.1
UNITS
V
V
V
V
nA
%/V
%
%
mmho
mA
µA
%
V
V
V
µA
µA
V
mV
mV
mV
mV
mV
mV
mV
mV
mV
Main Control Loops
Transconductance Amplifier g
m
Input DC Supply Current
Normal Mode
Shutdown
Maximum Duty Factor
Undervoltage Lockout
UVLO Hysteresis
Feedback Overvoltage Lockout
Sense Pins Bias Current
Soft-Start Charge Current
RUN Pin On Threshold
50
3.4
0.68
±2
1.5
1.35
35
55
82
37
57
82
60
2
0.66
±1
1.25
1.22
80
30
50
75
30
50
75
50
V
RUN1,2(HYS)
RUN Pin On Hysteresis
V
SENSE(MAX)
Maximum Current Sense Threshold,
0°C to 85°C (Note 2)
Maximum Current Sense Threshold,
–40°C to 125°C (Note 2)
l
l
l
l
l
l
l
V
MISMATCH
TG1, 2 t
r
TG1, 2 t
f
BG1, 2 t
r
BG1, 2 t
f
TG/BG t
1D
BG/TG t
2D
t
ON(MIN)
Channel to Channel Current Sense
Mismatch Voltage of V
SENSE(MAX)
TG Transition Time:
Rise Time
Fall Time
BG Transition Time:
Rise Time
Fall Time
ns
ns
ns
ns
ns
ns
ns
Top Gate Off to Bottom Gate On Delay C
LOAD
= 3300pF Each Driver (Note 6)
Synchronous Switch-On Delay Time
Bottom Gate Off to Top Gate On Delay C
LOAD
= 3300pF Each Driver (Note 6)
Top Switch-On Delay Time
Minimum On-Time
(Note 7)
38692fb
For more information
www.linear.com/LTC3869
3
LTC3869/LTC3869-2
elecTrical characTerisTics
SYMBOL
V
INTVCC
V
LDO
INT
V
EXTVCC
V
LDOHYS
V
LDO
EXT
V
PGL
I
PGOOD
V
PG
PARAMETER
Internal V
CC
Voltage
INTV
CC
Load Regulation
EXTV
CC
Switchover Voltage
EXTV
CC
Hysteresis
EXTV
CC
Voltage Drop
PGOOD Voltage Low
PGOOD Leakage Current
PGOOD Trip Level
I
CC
= 20mA, V
EXTVCC
= 5V
I
PGOOD
= 2mA
V
PGOOD
= 5V
V
FB
with Respect to Set Output Voltage
V
FB
Ramping Negative
V
FB
Ramping Positive
V
FREQ
= 1.2V
V
FREQ
= 0V
V
FREQ
≥ 2.4V
450
210
700
9
TG High
TG Low
BG High
BG Low
–10
10
500
250
780
250
10
2.6
1.5
2.4
1.1
Note 3:
T
J
is calculated from the ambient temperature T
A
and power
dissipation P
D
according to the following formulas:
LTC3869UFD: T
J
= T
A
+ (P
D
• 34°C/W)
LTC3869GN-2: T
J
= T
A
+ (P
D
• 80°C/W)
LTC3869UFD: T
J
= T
A
+ (P
D
• 37°C/W)
Note 4:
The LTC3869 is tested in a feedback loop that servos V
ITH1,2
to a
specified voltage and measures the resultant V
FB1,2
.
Note 5:
Dynamic supply current is higher due to the gate charge being
delivered at the switching frequency. See Applications Information.
Note 6:
Delay times are measured using 50% levels.
Note 7:
The minimum on-time condition is specified for an inductor
peak-to-peak ripple current ≥40% of I
MAX
(see Minimum On-Time
Considerations in the Applications Information section).
Note 8:
Guaranteed by design.
11
550
290
850
INTV
CC
Linear Regulator
6V < V
IN
< 38V
I
CC
= 0mA to 20mA
EXTV
CC
Ramping Positive
l
The
l
denotes the specifications which apply over the full operating
junction temperature range, otherwise specifications are at T
A
= 25°C (Note 2). V
IN
= 15V, V
RUN1,2
= 5V unless otherwise noted.
CONDITIONS
MIN
4.8
4.5
TYP
5
0.5
4.7
200
50
0.1
100
0.3
±2
MAX
5.2
2
UNITS
V
%
V
mV
mV
V
µA
%
%
kHz
kHz
kHz
kΩ
µA
Ω
Ω
Ω
Ω
PGOOD Output
Oscillator and Phase-Locked Loop
f
NOM
f
LOW
f
HIGH
I
FREQ
TG R
UP
TG R
DOWN
BG R
UP
BG R
DOWN
Nominal Frequency
Lowest Frequency
Highest Frequency
Frequency Setting Current
TG Pull-Up R
DS(ON)
TG Pull-Down R
DS(ON)
BG Pull-Up R
DS(ON)
BG Pull-Down R
DS(ON)
R
MODE/PLLIN
MODE/PLLIN Input Resistance
On Chip Driver
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:
The LTC3869 is tested under pulsed load conditions such that
T
J
≈ T
A
. The LTC3869E is guaranteed to meet performance specifications
from 0°C to 85°C. Specifications over the –40°C to 125°C operating
junction temperature range are assured by design, characterization
and correlation with statistical process controls. The LTC3869I is
guaranteed to meet performance specifications over the full –40°C to
125°C operating junction temperature range. The maximum ambient
temperature consistent with these specifications is determined by specific
operating conditions in conjunction with board layout, the package thermal
The combination of multiple PHY6220 can be applied to various scenarios, using one of them:Start building the project directly. This time, two projects, mesh_light_node_demo and mesh_switch_node_demo,...
Looking for a part-time job, have a small job to outsource, Dopod mobile phone uses CSocket method to communicate with the internet (public network), it is not difficult to implement, requires success...
With the rapid development of science and technology, especially the widespread application of digital technology and various ultra-large-scale integrated circuits, electronic equipment, especially...[Details]
1 Introduction
The high temperature tester is mainly used for temperature tracking measurement and data acquisition during the heating process. By systematically analyzing the test data, the...[Details]
In recent years, lighting has become an important area that countries around the world are targeting to promote energy conservation and environmental protection. According to statistics, about 20% ...[Details]
The automotive lighting and signal control system is responsible for controlling the vehicle's lighting, signal lights, electric horns, reversing and brake buzzers. Traditional automotive lighting...[Details]
General LED lighting has a current limiting resistor in the driving circuit, and the power consumed by the resistor has nothing to do with the LED light emission. In order to improve efficiency, a...[Details]
The typical fault troubleshooting listed below is for reference of maintenance personnel.
When the computer is turned on, the indicator light is off and there is no screen display
Mainte...[Details]
1 Introduction
There have been many studies on the detection and protection of power grid short circuit and line fault. The short circuit, overload and overvoltage protectors on the market have ...[Details]
Single-chip microcomputers are widely used because of their small size, powerful functions and low price. This article introduces the method of designing a micro electronic piano using the AT89C51 sin...[Details]
introduction
MAX6636 is a multi-channel precision temperature monitor that can not only monitor local temperature, but also connect up to 6 diodes externally. Each channel has a programmable...[Details]
Abstract: The output of high-range acceleration sensor is less than 10 mV under the excitation of small signal. The noise of traditional test system may cover such small voltage signal, so that hig...[Details]
Today, with energy becoming increasingly scarce, the utilization of natural energy has become the focus of people's attention. Among various natural energies, the endless solar energy is highly fav...[Details]
The rectified DC voltage is then converted back to AC using power electronics such as insulated gate bipolar transistors.
The output voltage is switched on and off at a high frequency, control...[Details]
The serial interface real-time clock chip DS1302 launched by Dallas Company in the United States can trickle charge the backup battery of the clock chip. Due to the main features of the chip such a...[Details]
Introduction
As the country increases its efforts to control the atmospheric environment, motorcycle emission regulations will become stricter year by year, and motorcycles that do not meet the...[Details]
With the rapid development of the national economy, lifting and hoisting operations are used more and more frequently and widely in various fields of economic construction. China has continuously expl...[Details]
Domestic Chip Exchange
京公网安备 11010802033920号
EEWORLD
