Topside Driver Voltage (BOOST) ................ 42V to –0.3V
Switch Voltage (SW) ..................................... 36V to –5V
INTV
CC
, (BOOST-SW), CLKOUT, PGOOD . 8.5V to –0.3V
RUN, TRACK/SS ........................................ 7V to –0.3V
SENSE
+
, SENSE
–
Voltages .........................11V to –0.3V
PLLIN/MODE, PHASMD, PLLLPF ......... INTV
CC
to –0.3V
EXTV
CC
..................................................... 10V to –0.3V
I
TH
, V
FB
Voltages ...................................... 2.7V to –0.3V
Peak Output Current <10µs (TG, BG) ..........................3A
INTV
CC
Peak Output Current ................................. 50mA
Operating Temperature Range (Note 2)....–40°C to 85°C
Junction Temperature (Note 3) ............................. 125°C
Storage Temperature Range .................. –65°C to 150°C
Lead Temperature (Soldering, 10 sec)
FE Package ....................................................... 300°C
PIN CONFIGURATION
TOP VIEW
PHASMD
TOP VIEW
CLKOUT
PLLLPF
I
TH
TRACKS/SS
V
FB
SGND
PGND
BG
INTV
CC
1
2
3
4
5
6
7
8
9
21
20 PHASMD
19 PLLIN/MODE
18 PGOOD
17 SENSE
+
16 SENSE
–
15 RUN
14 BOOST
13 TG
12 SW
11 V
IN
I
TH
1
TRACK/SS 2
V
FB
3
SGND 4
PGND 5
BG 6
7
INTV
CC
8
EXTV
CC
9 10
V
IN
SW
21
CLKOUT
PLLLPF
PLLIN/MODE
16 PGOOD
15 SENSE
+
14 SENSE
–
13 RUN
12 BOOST
11 TG
20 19 18 17
EXTV
CC
10
FE PACKAGE
20-LEAD PLASTIC TSSOP
T
JMAX
= 125°C,
θ
JA
= 35°C/W
EXPOSED PAD (PIN 21) IS SGND, MUST BE SOLDERED TO PCB
UFD PACKAGE
20-PIN (4mm
×
5mm) PLASTIC QFN
T
JMAX
= 125°C,
θ
JA
= 37°C/W
EXPOSED PAD (PIN 21) IS SGND, MUST BE SOLDERED TO PCB
ORDER INFORMATION
LEAD FREE FINISH
LTC3834EFE#PBF
LTC3834IFE#PBF
LTC3834EUFD#PBF
LTC3834IUFD#PBF
TAPE AND REEL
LTC3834EFE#TRPBF
LTC3834IFE#TRPBF
LTC3834EUFD#TRPBF
LTC3834IUFD#TRPBF
PART MARKING*
LTC3834FE
LTC3834FE
3834
3834
PACKAGE DESCRIPTION
20-Lead Plastic TSSOP
20-Lead Plastic TSSOP
20-Lead (4mm
×
5mm) Plastic QFN
20-Lead (4mm
×
5mm) Plastic QFN
TEMPERATURE RANGE
–40°C to 85°C (Note 2)
–40°C to 85°C
–40°C to 85°C (Note 2)
–40°C to 85°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 non-standard 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/
2
3834fc
For more information
www.linear.com/LTC3834
LTC3834
ELECTRICAL CHARACTERISTICS
SYMBOL
V
FB
I
VFB
V
REFLNREG
V
LOADREG
g
m
I
Q
UVLO
V
OVL
I
SENSE
DF
MAX
I
TRACK/SS
V
RUN
ON
V
SENSE(MAX)
TG t
r
TG t
f
BG t
r
BG t
f
TG/BG t
1D
BG/TG t
2D
t
ON(MIN)
V
INTVCCVIN
V
LDOVIN
V
INTVCCEXT
V
LDOEXT
V
EXTVCC
V
LDOHYS
f
NOM
f
LOW
f
HIGH
f
SYNCMIN
f
SYNCMAX
I
PLLLPF
PARAMETER
Regulated Feedback Voltage
Feedback Current
Reference Voltage Line Regulation
Output Voltage Load Regulation
Main Control Loops
(Note 4); I
TH
Voltage = 1.2V
(Note 4)
V
IN
= 4V to 30V (Note 4)
(Note 4)
Measured in Servo Loop;
∆I
TH
Voltage = 1.2V to 0.7V
Measured in Servo Loop;
∆I
TH
Voltage = 1.2V to 2V
I
TH
= 1.2V; Sink/Source 5µA (Note 4)
(Note 5)
RUN = 5V, V
FB
= 0.83V (No Load)
V
RUN
= 0V
V
IN
Ramping Down
Measured at V
FB
Relative to Regulated V
FB
V
SENSE–
= V
SENSE+
= 0V
In Dropout
V
TRACK
= 0V
V
RUN
Rising
V
FB
= 0.7V, V
SENSE–
= 3.3V
(Note 6)
C
LOAD
= 3300pF
C
LOAD
= 3300pF
(Note 6)
C
LOAD
= 3300pF
C
LOAD
= 3300pF
l
l
l
l
l
The
l
denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T
A
= 25°C. V
IN
= 12V, V
RUN
= 5V unless otherwise noted.
CONDITIONS
MIN
0.792
TYP
0.800
–5
0.002
0.1
–0.1
0.5
30
4
3.7
8
98
0.85
0.5
85
10
–220
99.4
1.1
0.7
100
50
50
40
40
70
70
200
5
7.2
4.5
5.25
0.2
7.5
0.2
4.7
0.2
V
PLLLPF
= No Connect
V
PLLLPF
= 0V
V
PLLLPF
= INTV
CC
PLLIN/MODE = External Clock; V
PLLLPF
= 0V
650
360
220
475
400
250
530
115
800
–5
5
440
280
580
140
5.5
1.0
7.8
1.0
1.45
0.9
115
90
90
90
80
50
10
4
12
MAX
0.808
–50
0.02
0.5
–0.5
UNITS
V
nA
%/V
%
%
mmho
µA
µA
V
%
µA
%
µA
V
mV
ns
ns
ns
ns
ns
ns
ns
V
%
V
%
V
V
kHz
kHz
kHz
kHz
kHz
µA
µA
3834fc
Transconductance Amplifier g
m
Input DC Supply Current
Sleep Mode
Shutdown
Undervoltage Lockout
Feedback Overvoltage Lockout
Sense Pins Total Source Current
Maximum Duty Factor
Soft-Start Charge Current
RUN Pin ON Threshold
Maximum Current Sense Threshold
TG Transition Time:
Rise Time
Fall Time
BG Transition Time:
Rise Time
Fall Time
Top Gate Off to Bottom Gate On Delay C
LOAD
= 3300pF
Synchronous Switch-On Delay Time
Bottom Gate Off to Top Gate On Delay C
LOAD
= 3300pF
Top Switch-On Delay Time
Minimum On-Time
Internal V
CC
Voltage
INTV
CC
Load Regulation
Internal V
CC
Voltage
INTV
CC
Load Regulation
EXTV
CC
Switchover Voltage
EXTV
CC
Hysteresis
Nominal Frequency
Lowest Frequency
Highest Frequency
Minimum Synchronizable Frequency
Phase Detector Output Current
Sinking Capability
Sourcing Capability
(Note 7)
8.5V < V
IN
< 30V, V
EXTVCC
= 0V
I
CC
= 0mA to 20mA, V
EXTVCC
= 0V
V
EXTVCC
= 8.5V
I
CC
= 0mA to 20mA, V
EXTVCC
= 8.5V
EXTV
CC
Ramping Positive
INTV
CC
Linear Regulator
Oscillator and Phase-Locked Loop
Maximum Synchronizable Frequency PLLIN/MODE = External Clock; V
PLLLPF
= 2V
f
PLLIN/MODE
< f
OSC
f
PLLIN/MODE
> f
OSC
For more information
www.linear.com/LTC3834
3
LTC3834
ELECTRICAL CHARACTERISTICS
SYMBOL
PGOOD Output
V
PGL
I
PGOOD
V
PG
PGOOD Voltage Low
PGOOD Leakage Current
PGOOD Trip Level
I
PGOOD
= 2mA
V
PGOOD
= 5V
V
FB
with Respect to Set Regulated Voltage
V
FB
Ramping Negative
V
FB
Ramping Positive
–12
8
–10
10
0.1
0.3
±1
–8
12
V
µA
%
%
PARAMETER
The
l
denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T
A
= 25°C. V
IN
= 12V, V
RUN
= 5V unless otherwise noted.
CONDITIONS
MIN
TYP
MAX
UNITS
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 LTC3834E is guaranteed to meet performance specifications
from 0°C to 85°C. Specifications over the –40°C to 85°C operating
temperature range are assured by design, characterization and correlation
with statistical process controls. The LTC3834I is guaranteed to meet
performance specifications over the –40°C to 85°C operating temperature
range.
Note 3:
T
J
is calculated from the ambient temperature T
A
and power
dissipation P
D
according to the following formulas:
LTC3834FE: T
J
= T
A
+ (P
D
• 35°C/W)
LTC3834UFD: T
J
= T
A
+ (P
D
• 37°C/W)
Note 4:
The LTC3834 is tested in a feedback loop that servos V
ITH
to a
specified voltage and measures the resultant V
FB
.
Note 5:
Dynamic supply current is higher due to the gate charge being
delivered at the switching frequency. See Applications Information.
Note 6:
Rise and fall times are measured using 10% and 90% levels. 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).
[i=s]This post was last edited by CokezzZ on 2021-6-2 15:15[/i]Create a new project folder
Create a folder named LED to store the project files, and then create two folders in it. The Listing folder i...
Those engineers who complained that PSoC1 was too simple can finally relax their frowns - Cypress recently held a product launch conference in Beijing, claiming it was the "most important one in the p...
The development board used to be WINCE4.2 and the application was CF1.1, which ran normally. Now it has been upgraded to WINCE6.0 and the application is CF3.5, which is obviously much slower. At first...
I would like to ask whether to burn BOOT.BIN+NK.BIN files or BOOT.NB0+NK.NB0 files in WINCE? What is the difference between BIN files and NB0 files? Can someone explain it in detail? Please....
[color=#000][size=12px][font=微软雅黑]Does the TM4C129X chip have a built-in bootloader in the ROM? Can it be booted directly, or do I need to write a bootloader myself? [/font][/size][/color]...
I use pc104 and want to develop a program using its serial port, but a strange phenomenon occurs: if I use ioctl (....SIO_HW_SET....) to set the parity bit, stop bit, etc. of the serial port, I cannot...
Recently, the results of the 2018 German Red Dot Design Award were announced. GoodWe, a company located in Suzhou High-tech Zone, stood out among thousands of outstanding design products from 5...[Details]
In the actual project development process, hardware circuits often need to be modified, and the modified parts need to modify the driver. Thinking about the coming and going of such requirements is t...[Details]
The program got stuck during LCD initialization. Through hardware debugging, it was found that it was stuck in the Delay_ms() function. Going to the definition, it was found to be a macro definition ...[Details]
1. The first project We are going to create the first project, which is mainly for project analysis, so that we can understand how CubeMX works and how to trace the code logic. Okay, no more nonsense...[Details]
introduction STM32 has many registers, which are difficult to remember, so the official packaged two sets of library functions. One is the standard library, but the official has not updated it on F7,...[Details]
I have always wanted to write some posts and blogs, but I just couldn't bear to do it as I just graduated. After some preparation, I decided to write down some of the things I learned in the past few...[Details]
Time flies. Since the beginning of 2018, news related to home appliance companies have repeatedly made headlines, and competition in the home appliance market continues to intensify. In order to be...[Details]
In the Huaxing Optoelectronics LCD panel
factory
located in Guangming New District, Shenzhen
, apart from a few people repairing machines, it is often difficult to see other people. Here, ev...[Details]
This program is used in the development board to generate sounds of different frequencies. The overall program is relatively simple, mainly using two timers. The code and my comments are as follows. ...[Details]
1 Introduction Due to the special working environment of coal mine production, the production process is more dangerous and unsafe than the general industry. With the continuous increase in c...[Details]
On the eve of 5G
commercialization,
ZTE
has established and adhered to
the
5G
pioneer strategy, focusing on
5G
end-to-end solutions, and investing in standard setting, ...[Details]
Every era has anxiety that has nowhere to go. Let's follow the embedded editor to learn about the relevant content.
The anxiety of the post-Internet era is that if you don’t revolutionize ...[Details]
As the brain of a mobile phone, the mobile phone processing chip is of great importance. Xiaomi, which started out as the MIUI company, has long been keenly aware of the gap between China and devel...[Details]
//Observe the difference between feeding the dog and not feeding the dog, and use the LED indicator of the PB port for status indication. //Switch the LED indicator enable switch of the PB po...[Details]
stm32/stm8
京公网安备 11010802033920号
EEWORLD
