Buck-Boost Controller. LT8390A Datasheet

LT8390A Controller. Datasheet pdf. Equivalent

LT8390A Datasheet
Recommendation LT8390A Datasheet
Part LT8390A
Description 60V 2MHz Synchronous 4-Switch Buck-Boost Controller
Feature LT8390A; LT8390A 60V 2MHz Synchronous 4-Switch Buck-Boost Controller with Spread Spectrum FEATURES DESCRIP.
Manufacture Analog Devices
Datasheet
Download LT8390A Datasheet




Analog Devices LT8390A
LT8390A
60V 2MHz Synchronous
4-Switch Buck-Boost Controller
with Spread Spectrum
FEATURES
DESCRIPTION
nn 4-Switch Single Inductor Architecture Allows VIN
Above, Below or Equal to VOUT
nn Up to 95% Efficiency at 2MHz
nn Proprietary Peak-Buck Peak-Boost Current Mode
nn Wide VIN Range: 4V to 60V
nn ±1.5% Output Voltage Accuracy: 1V ≤ VOUT ≤ 60V
nn ±3% Input or Output Current Accuracy with Monitor
nn Spread Spectrum Frequency Modulation for Low EMI
nn High Side PMOS Load Switch Driver
nn No Top MOSFET Refresh Noise in Buck or Boost
nn Adjustable and Synchronizable: 600kHz to 2MHz
nn VOUT Disconnected from VIN During Shutdown
nn Available in 28-Lead TSSOP with Exposed Pad and
28-Lead QFN (4mm × 5mm)
APPLICATIONS
nn Automotive, Industrial, Telecom Systems
nn High Frequency Battery-Powered System
The LT®8390A is a synchronous 4-switch buck-boost DC/DC
controller that regulates output voltage, input or output
current from an input voltage above, below, or equal to
the output voltage. The proprietary peak-buck peak-boost
current mode control scheme allows adjustable and syn-
chronizable 600kHz to 2MHz fixed frequency operation, or
internal 25% triangle spread spectrum frequency modula-
tion for low EMI. With a 4V to 60V input voltage range, 0V
to 60V output voltage capability, and seamless low noise
transitions between operation regions, the LT8390A is ideal
for voltage regulator, battery and supercapacitor charger
applications in automotive, industrial, telecom, and even
battery-powered systems.
The LT8390A provides input or output current monitor
and power good flag. Fault protection is also provided to
detect output short-circuit condition, during which the
LT8390A retries, latches off, or keeps running.
L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of Analog
Devices, Inc. All other trademarks are the property of their respective owners.
TYPICAL APPLICATION
VIN
6V TO 28V
CONTINUOUS
4V TO 56V
TRANSIENT
95% Efficient 48W (12V 4A) 2MHz Buck-Boost Voltage Regulator
5mΩ 1µH
10mΩ
22µF
63V
4.7µF
100V
×2
0.1µF
100V
×2
383k
169k
ISMON
100k
0.1µF
SW1 LSP
BST1
LSN
SW2
BST2
0.1µF
0.1µF
16V
×2
INTVCC BG1
TG1
VIN
1µF
EN/UVLO
LOADTG
TEST
ISMON
CTRL
133k
0.47µF
LOADEN
VREF
SS
22nF
LT8390A
BG2
GND
TG2
VOUT
INTVCC
1µF
ISP
ISN
FB
SYNC/SPRD
INTVCC
INTVCC
4.7µF
PGOOD
VC RT
10k
2.2nF
59.0k
2MHz
8390a TA01a
10Ω
1µF 10Ω
SSFM OFF
SSFM ON
100k
PGOOD
22µF
16V
×2
VOUT
12V
4A
22µF
16V
100
Efficiency vs VIN
90
80
110k
10k
70
IOUT = 4A
IOUT = 2A
60 CONTINUOUS OPERATION WITH
HIGHEST COMPONENT TEMPERATURE
50 BELOW 90°C (TA = 25°C)
0 5 10 15 20 25 30 35
40
INPUT VOLTAGE (V)
8390a TA01b
For more information www.linear.com/LT8390A
8390afa
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Analog Devices LT8390A
LT8390A
ABSOLUTE MAXIMUM RATINGS (Note 1)
VIN, EN/UVLO, VOUT, ISP, ISN.....................................60V
(ISP-ISN)...........................................................–1V to 1V
BST1, BST2.................................................................66V
SW1, SW2, LSP, LSN...................................... –6V to 60V
INTVCC, (BST1-SW1), (BST2-SW2)...............................6V
(BST1-LSP), (BST1-LSN)..............................................6V
FB, LOADEN, SYNC/SPRD, CTRL, PGOOD....................6V
Operating Junction Temperature Range (Notes 2, 3)
LT8390AE............................................ –40°C to 125°C
LT8390AI............................................. –40°C to 125°C
LT8390AH............................................ –40°C to 150°C
Storage Temperature Range.................... –65°C to 150°C
PIN CONFIGURATION
BG1 1
BST1 2
SW1 3
TG1 4
LSP 5
LSN 6
VIN
INTVCC
EN/UVLO
7
8
9
TEST 10
LOADEN 11
VREF 12
CTRL 13
ISP 14
TOP VIEW
29
GND
28 BG2
27 BST2
26 SW2
25 TG2
24 VOUT
23 LOADTG
22 SYNC/SPRD
21 RT
20 VC
19 FB
18 SS
17 PGOOD
16 ISMON
15 ISN
FE PACKAGE
28-LEAD PLASTIC TSSOP
θJA = 30°C/W, θJC = 5°C/W
EXPOSED PAD (PIN 29) IS GND, MUST BE SOLDERED TO PCB
TOP VIEW
28 27 26 25 24 23
TG1 1
22 TG2
LSP 2
LSN 3
21 VOUT
20 LOADTG
VIN 4
INTVCC 5
EN/UVLO 6
TEST 7
29 19 SYNC/SPRD
GND 18 RT
17 VC
16 FB
LOADEN 8
15 SS
9 10 11 12 13 14
UFD PACKAGE
28-LEAD (4mm × 5mm) PLASTIC QFN
θJA = 43°C/W, θJC = 3.4°C/W
EXPOSED PAD (PIN 29) IS GND, MUST BE SOLDERED TO PCB
ORDER INFORMATION http://www.linear.com/product/LT8390A#orderinfo
LEAD FREE FINISH
TAPE AND REEL
PART MARKING*
PACKAGE DESCRIPTION
TEMPERATURE RANGE
LT8390AEFE#PBF
LT8390AEFE#TRPBF
LT8390AFE
28-Lead Plastic TSSOP
–40°C to 125°C
LT8390AIFE#PBF
LT8390AIFE#TRPBF
LT8390AFE
28-Lead Plastic TSSOP
–40°C to 125°C
LT8390AHFE#PBF
LT8390AHFE#TRPBF
LT8390AFE
28-Lead Plastic TSSOP
–40°C to 150°C
LT8390AEUFD#PBF
LT8390AEUFD#TRPBF 8390A
28-Lead (4mm × 5mm) Plastic QFN
–40°C to 125°C
LT8390AIUFD#PBF
LT8390AIUFD#TRPBF 8390A
28-Lead (4mm × 5mm) Plastic QFN
–40°C to 125°C
LT8390AHUFD#PBF
LT8390AHUFD#TRPBF 8390A
28-Lead (4mm × 5mm) Plastic QFN
–40°C to 150°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/. Some packages are available in 500 unit reels through
designated sales channels with #TRMPBF suffix.
8390afa
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Analog Devices LT8390A
LT8390A
E LECTRICAL CHARACTERISTICS The l denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at TA = 25°C (Note 2). VIN = 12V, VEN/UVLO = 1.5V unless otherwise noted.
PARAMETER
Supply
VIN Operating Voltage Range
VIN Quiescent Current
VOUT Voltage Range
VOUT Quiescent Current
Linear Regulators
INTVCC Regulation Voltage
INTVCC Load Regulation
INTVCC Line Regulation
INTVCC Current Limit
INTVCC Dropout Voltage (VIN – INTVCC)
INTVCC Undervoltage Lockout Threshold
INTVCC Undervoltage Lockout Hysteresis
VREF Regulation Voltage
VREF Load Regulation
VREF Line Regulation
VREF Current Limit
VREF Undervoltage Lockout Threshold
VREF Undervoltage Lockout Hysteresis
Control Inputs/Outputs
CONDITIONS
VEN/UVLO = 0.3V
VEN/UVLO = 1.1V
Not Switching
VVEENN//UUVVLLOO
=
=
0.3V,
1.1V,
VVOOUUTT
=
=
12V
12V
Not Switching, VOUT = 12V
IINTVCC = 20mA
IINTVCC = 0mA to 80mA
IINTVCC = 20mA, VIN = 6V to 60V
VINTVCC = 4.5V
IINTVCC = 20mA, VIN = 4V
Falling
IVREF = 100µA
IVREF = 0mA to 1mA
IVREF = 100µA, VIN = 4V to 60V
VREF = 1.8V
Falling
MIN TYP MAX
l4
60
12
270
2.1 2.8
l0
60
0.1 0.5
0.1 0.5
20 40 60
4.85 5.0 5.15
14
14
110 145 190
160
3.44 3.54 3.64
0.24
l 1.97 2.00 2.03
0.4 1
0.1 0.2
2 2.5 3.2
1.78 1.84 1.90
50
EN/UVLO Shutdown Threshold
EN/UVLO Enable Threshold
EN/UVLO Enable Hysteresis
Falling
l 0.3
l 1.196
0.6
1.220
13
1.0
1.244
EN/UVLO Hysteresis Current
CTRL Input Bias Current
CTRL Latch-Off Threshold
CTRL Latch-Off Hysteresis
Load Switch Driver
LOADEN Threshold
VVVEEENNN///UUUVVVLLLOOO
=
=
=
0.3V
1.1V
1.3V
VCTRL = 0.75V, Current Out of Pin
Falling
Rising
–0.1
2.1
–0.1
0
l 285
l 1.3
0
2.5
0
20
300
25
1.4
0.1
2.9
0.1
50
315
1.5
LOADEN Hysteresis
Minimum VOUT for LOADTG to be On
LOADTG On Voltage V(VOUT-LOADTG)
LOADTG Off Voltage V(VOUT-LOADTG)
LOADEN to LOADTG Turn On Propagation Delay
LOADEN to LOADTG Turn Off Propagation Delay
LOADTG Turn On Fall Time
LOADTG Turn Off Rise Time
VLOADEN = 5V
VOUT = 12V
VOUT = 12V
CLOADTG = 3.3nF to VOUT, 50% to 50%
CLOADTG = 3.3nF to VOUT, 50% to 50%
CLOADTG = 3.3nF to VOUT, 10% to 90%
CLOADTG = 3.3nF to VOUT, 90% to 10%
220
2.4
4.5 5
–0.1 0
90
40
300
10
3
5.5
0.1
UNITS
V
µA
µA
mA
V
µA
µA
µA
V
%
%
mA
mV
V
V
V
%
%
mA
V
mV
V
V
mV
µA
µA
µA
nA
mV
mV
V
mV
V
V
V
ns
ns
ns
ns
For more information www.linear.com/LT8390A
8390afa
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