synchronous boost converter controller that drives all
N-channel power MOSFETs. Synchronous rectification
increases efficiency, reduces power losses and eases
thermal requirements, allowing the LTC3788-1 to be used
in high power boost applications.
A constant-frequency current mode architecture allows
a phase-lockable frequency of up to 850kHz. OPTI-LOOP
compensation allows the transient response to be optimized
over a wide range of output capacitance and ESR values.
The LTC3788-1 features a precision 1.2V reference and a
power good output indicator. A 4.5V to 38V input supply
range encompasses a wide range of system architectures
and battery chemistries.
Independent SS pins for each controller ramp the output
voltages during start-up. The PLLIN/MODE pin selects
among Burst Mode operation, pulse-skipping mode or
continuous inductor current mode at light loads.
For a leadless 32-pin QFN package with additional features
of adjustable current limit, clock out, phase modulation
and two PGOOD outputs, see the LTC3788 data sheet.
L,
LT, LTC, LTM, Linear Technology, OPTI-LOOP Burst Mode and the Linear logo are registered
,
trademarks and No R
SENSE
and ThinSOT are trademarks of Linear Technology Corporation.
All other trademarks are the property of their respective owners. Protected by U. S. Patents,
including 5408150, 5481178, 5705919, 5929620, 6144194, 6177787, 6580258.
Synchronous Operation for Highest Efficiency and
Reduced Heat Dissipation
Wide Input Range: 4.5V to 38V (40V Abs Max) and
Operates Down to 2.5V After Start-Up
Output Voltages Up to 60V
±1% 1.2V Reference Voltage
R
SENSE
or Inductor DCR Current Sensing
100% Duty Cycle Capability for Synchronous MOSFET
Low Quiescent Current: 125μA
Phase-Lockable Frequency (75kHz to 850kHz)
Programmable Fixed Frequency (50kHz to 900kHz)
Adjustable Output Voltage Soft-Start
Power Good Output Voltage Monitor
Low Shutdown Current I
Q
: < 8μA
Internal LDO Powers Gate Drive from VBIAS or EXTV
CC
Available in a Narrow SSOP Package
APPLICATIONS
n
n
n
n
Industrial
Automotive
Medical
Military
TYPICAL APPLICATION
3mΩ
4.7μF
TG1 VBIAS INTV
CC
V
OUT
12V AT 5A
1.25μH
0.1μF
SW1
BG1
SENSE1
LTC3788-1
+
V
IN
4.5V TO 12V START-UP VOLTAGE
OPERATES THROUGH TRANSIENTS DOWN TO 2.5V
V
IN
4.7μF
TG2
4mΩ
220μF
100
Efficiency and Power Loss
vs Load Current
10000
90
BOOST1
BOOST2
SW2
BG2
+
3.3μH
0.1μF
V
OUT
24V AT 3A
EFFICIENCY (%)
80
70
60
50
40
30
1000
POWER LOSS (mW)
100
SENSE2
SENSE1
–
RUN1
110k
SENSE2
–
PGND
232k
10
RUN2
VFB1
VFB2
PGOOD1
EXTV
CC
FREQ
PLLIN/MODE
ITH1 SS1 SGND SS2 ITH2
15nF
12.1k
2.7k
100pF
0.1μF
220pF
0.1μF
15nF
8.66k
V
IN
= 12V
1
V
OUT
= 24V
10
Burst Mode OPERATION
FIGURE 9 CIRCUIT
0.1
0
0.00001 0.0001 0.001 0.01
0.1
1
10
OUTPUT CURRENT (A)
20
220μF
37881 TA01b
220μF
12.1k
37881 TA01a
37881f
1
LTC3788-1
ABSOLUTE MAXIMUM RATINGS
(Note 1)
PIN CONFIGURATION
TOP VIEW
ITH1
VFB1
SENSE1
+
SENSE1
–
FREQ
PLLIN/MODE
SGND
RUN1
RUN2
SENSE2
+
1
2
3
4
5
6
7
8
9
28 SS1
27 PGOOD1
26 SW1
25 TG1
24 BOOST1
23 BG1
22 VBIAS
21 PGND
20 EXTV
CC
19 INTV
CC
18 BG2
17 BOOST2
16 TG2
15 SW2
VBIAS......................................................... –0.3V to 40V
BOOST1, BOOST2 ...................................... –0.3V to 76V
SW1, SW2 ................................................. –0.3V to 70V
RUN1, RUN2 ................................................ –0.3V to 8V
Maximum Current Sourced into Pin
from Source > 8V..............................................100μA
PGOOD1, PLLIN/MODE ............................... –0.3V to 6V
INTV
CC
, (BOOST1-SW1, BOOST2-SW2) ...... –0.3V to 6V
EXTV
CC
......................................................... –0.3V to 6V
SENSE1
+
, SENSE1
–
,
SENSE2
+
, SENSE2
–
.................................... –0.3V to 40V
SENSE1
+
– SENSE1
–
,
SENSE2
+
– SENSE2
–
................................. –0.3V to 0.3V
SS1, SS2, ITH1, ITH2, FREQ,
VFB1, VFB2 ........................................... –0.3V to INTV
CC
Operating Junction Temperature Range ... –40°C to 125°C
Storage Temperature Range................... –65°C to 125°C
Lead Temperature (Soldering, 10 seconds) .......... 300°C
SENSE2
–
10
11
VFB2 12
ITH2 13
SS2 14
GN PACKAGE
28-LEAD PLASTIC SSOP
T
JMAX
= 125°C,
θ
JA
= 90°C/W
ORDER INFORMATION
LEAD FREE FINISH
LTC3788EGN-1#PBF
LTC3788IGN-1#PBF
TAPE AND REEL
LTC3788EGN-1#TRPBF
LTC3788IGN-1#TRPBF
PART MARKING*
LTC3788GN-1
LTC3788GN-1
PACKAGE DESCRIPTION
28-Lead Plastic SSOP
28-Lead Plastic SSOP
TEMPERATURE RANGE
–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.
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/
ELECTRICAL CHARACTERISTICS
SYMBOL
VBIAS
VFB1,2
IFB1,2
V
REFLNREG
PARAMETER
Chip Bias Voltage Operating Range
Regulated Feedback Voltage
Feedback Current
Reference Line Voltage Regulation
Main Control Loop
The
l
denotes the specifications which apply over the full operating
junction temperature range, otherwise specifications are at T
Hello everyone, when reading the code, I found a usage like this [f->keep_last = !!keep_last;] What does this [!!] mean? What are the benefits of using it this way? [code]static int frame_queue_init(F...
I just got a wifi232 module from someone, but I don't know how to use it. It says that it can be used directly as a serial port. How can I use it? I don't understand how the communication between the ...
I am debugging a program in a WinCE 5.0 device in Visual Studio 2005 (it is just a program on the host computer and has nothing to do with the underlying hardware). When debugging, an error message po...
TI 15.4-Stack is an IEEE 802.15.4e/g RF communication stack. It is an integral part of the SimpleLink CC13xx/CC26x2 Software Development Kit (SDK) and supports star topology networks for either Sub-1G...
Does the malloc function in C language return an absolute address? In embedded development, can I use the address returned by malloc as an absolute address and then read and write directly at that add...
As more and more consumers purchase new energy vehicles, the safety of electric vehicles has become a major concern. This has been particularly prominent following a series of electric vehicle fire...[Details]
The jammer is a signal blocker, mainly composed of a chip and a radio transmitter. When the car owner presses the remote control lock button, the jammer interferes with the electronic lock receivin...[Details]
On August 25th, SK Hynix announced that it has completed development and entered mass production of its 321-layer, 2Tb QLC NAND flash memory product. This achievement marks the world's first applic...[Details]
Logic analyzers are widely used tools in digital design verification and debugging. They can verify the proper functioning of digital circuits and help users identify and troubleshoot faults. They ...[Details]
In the summer of 2025, BlueOval SK, a joint venture between Ford and SK On, officially started production at its first battery factory in Kentucky.
According to the original plan, this w...[Details]
The practice of warming up a car originated with gasoline-powered vehicles. Warming up the engine allows it to enter a better working state and ensures good lubrication. This has become a habit for...[Details]
A multilevel inverter converts a DC signal into a multilevel staircase waveform. Instead of a straight positive-negative output waveform, the output waveform of a multilevel inverter alternates in ...[Details]
Puttshack's Trackaball uses the Nordic nRF54L15 system-on-chip (SoC) to monitor sensors and enable Bluetooth low energy connectivity, while the nPM2100 power management integrated circuit (PMIC) ...[Details]
On August 20, it was reported that the specifications of Intel's upcoming Panther Lake mobile processor appeared on the Intel GFX CI website, which mainly focuses on Intel's open source Linux drive...[Details]
Introduction: Traditionally, lead-acid batteries have primarily been used to provide backup power and power regulation based on location. In typical applications, the battery's actual use (discharg...[Details]
At present, the most troubling thing about pure electric vehicles as new energy sources is not only the range anxiety, but also the disadvantage of long charging time. At present, ternary lithium b...[Details]
Automotive electronics systems are facing a dual challenge of functional safety and cybersecurity.
The NXP
S32K3
series MCUs utilize a deep protection system built with a Hardware Sec...[Details]
The field of AI is constantly evolving. We are witnessing a profound shift from the era of "generative AI" to the era of "agent AI." This transformation has the potential to reshape industries an...[Details]
Recently, Shenzhen Ruixin Intelligent Medical Technology Co., Ltd. (hereinafter referred to as Ruixin Medical) released a fully automatic AI vascular interventional surgical robot, marking the begi...[Details]
Samsung Display has recently signed a contract with Tesla (US) to supply OLED (organic light-emitting diode) panels for the facial display of Tesla's humanoid robot, Optimus Prime. According to Pho...[Details]
Linux and Android
京公网安备 11010802033920号
EEWORLD
