DataSheetWiki


LT8601 fiches techniques PDF

Linear Technology - 42V Triple Monolithic Synchronous Step-Down Regulator

Numéro de référence LT8601
Description 42V Triple Monolithic Synchronous Step-Down Regulator
Fabricant Linear Technology 
Logo Linear Technology 





1 Page

No Preview Available !





LT8601 fiche technique
LT8601
FEATURES
nn Flexible Power Supply System Providing Three
Outputs Over a Wide Input Voltage Range
nn Two High Voltage Synchronous Buck Regulators
nn 3V to 42V Input Voltage Range
nn Output Currents Up to 2.5A and 1.5A
nn High Efficiency Up to 93%
nn One Low Voltage Synchronous Buck Regulator
nn 2.6V to 5.5V Input Voltage Range
nn Output Current Up to 1.8A and 95% Efficiency
nn Resistor Programmable and Synchronizable
from 250kHz to 2.2MHz Switching Frequency
nn Low Ripple Burst Mode® Operation
nn 30µA IQ at 12VIN to 3.3VOUT2
nn Output Ripple < 15mV
nn Programmable Power-On Reset
nn Power Good Indicators
nn 2-Phase Clock Reduces Input Current Ripple
nn Available in Thermally Enhanced 40-Lead QFN
(6mm × 6mm) Package
APPLICATIONS
nn Automotive Systems
nn Distributed Supply Regulation
nn Industrial Controls and Power Supplies
42V Triple Monolithic
Synchronous Step-Down
Regulator
DESCRIPTION
The LT®8601 is a triple channel, current mode, monolithic
buck switching regulator with a programmable power-on
reset. All regulators are synchronized to a single oscillator
with an adjustable frequency from 250kHz to 2.2MHz. The
LT8601 can be configured for micropower Burst Mode
or Pulse-Skipping operation at light load. Micropower
operation results in quiescent current of 30µA with all
three regulators operating as shown in the application
below with no load applied.
The high voltage channels are synchronous buck regula-
tors that operate from an input of 3.0V to 42V. The output
currents are up to 1.5A (OUT1) and 2.5A (OUT2). The
low voltage channel operates from an input of 2.6V to
5.5V. Internal synchronous power switches provide high
efficiency with output currents up to 1.8A. The LT8601
uses a 2-phase clock with channel 1 operating 180° from
channels 2 and 3 to reduce input ripple current on both
HV and LV inputs. All channels have cycle-by-cycle cur-
rent limit, providing protection against shorted outputs.
Thermal shutdown provides additional protection.
TheLT8601isavailableina40-lead6mm×6mmQFN package.
L, LT, LTC, LTM, Linear Technology, the Linear logo and Burst Mode are registered trademarks
of Linear Technology Corporation. All other trademarks are the property of their respective
owners.
TYPICAL APPLICATION
IN
6V TO 24V,
TRANSIENTS
TO 42V
OUT2
Automotive Input Stepped Down to 5V, 3.3V and 1.8V Outputs at 2MHz
VIN BST1
PVIN1 LT8601
PVIN2
EN/UVLO
SW1
FB1
POREN
3
RST
PG1-3
BST2
RUN3
BIAS
PVIN3
INTVCC
SW2
FB2
3.3μH
OUT1
5V, 1.5A
22μF
1μH OUT2
3.3V, 1A*
47μF
CPOR
2 TRKSS1, 2
RT
SW3
FB3
1μH OUT3
1.8V, 1.8A
22μF
SYNC GND
8601 TA01a
*IMAX = 2.5A – IPVIN3 – IBIAS
HV Channel Efficiency, VOUT1 = 5V
100 2.0
90
80 EFFICIENCY
1.8
1.6
70 VIN = 12V
1.4
60 1.2
50 1.0
40
POWER
0.8
30
LOSS
0.6
20 0.4
10
0
fSW = 1MHz
fSW = 2MHz
0.2
0
0 0.3 0.6 0.9 1.2 1.5
LOAD CURRENT (A)
8601 TA01b
LV Channel Efficiency, VOUT3 = 1.8V
100 1.0
90
80 EFFICIENCY
0.9
0.8
70 0.7
60 0.6
50 0.5
40 POWER
30 LOSS
0.4
0.3
20 0.2
10
0
fSW = 1MHz
fSW = 2MHz
0.1
0
0 0.3 0.6 0.9 1.2 1.5 1.8
LOAD CURRENT (A)
8601 TA01c
8601f
For more information www.linear.com/LT8601
1

PagesPages 24
Télécharger [ LT8601 ]


Fiche technique recommandé

No Description détaillée Fabricant
LT8601 42V Triple Monolithic Synchronous Step-Down Regulator Linear Technology
Linear Technology
LT8602 42V Quad Monolithic Synchronous Step-Down Regulator Linear Technology
Linear Technology
LT8609 2A/3A Peak Synchronous Step-Down Regulator Linear Technology
Linear Technology
LT8609A 2A/3A Peak Synchronous Step-Down Regulator Linear Technology
Linear Technology

US18650VTC5A

Lithium-Ion Battery

Sony
Sony
TSPC106

PCI Bus Bridge Memory Controller

ATMEL
ATMEL
TP9380

NPN SILICON RF POWER TRANSISTOR

Advanced Semiconductor
Advanced Semiconductor


www.DataSheetWiki.com    |   2020   |   Contactez-nous  |   Recherche