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LT8609AIMSE#TRPBF

Description
Conv DC-DC 3V to 42V Synchronous Step Down Single-Out 0.8V to 41.5V 3A Automotive 10-Pin MSOP EP T/R
File Size2MB,30 Pages
ManufacturerADI
Websitehttps://www.analog.com
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LT8609AIMSE#TRPBF Overview

Conv DC-DC 3V to 42V Synchronous Step Down Single-Out 0.8V to 41.5V 3A Automotive 10-Pin MSOP EP T/R

LT8609AIMSE#TRPBF Parametric

Parameter NameAttribute value
EU restricts the use of certain hazardous substancesCompliant
ECCN (US)EAR99
Part StatusActive
HTS8542.39.00.01
TypeSynchronous Step Down
Output TypeAdjustable
Switching Frequency (kHz)200 to 2200
Switching RegulatorYes
Number of Outputs1
Output Voltage (V)0.8 to 41.5
Maximum Output Current (A)3
Minimum Input Voltage (V)3
Maximum Input Voltage (V)42
Operating Supply Voltage (V)3 to 42
Typical Switch Current (A)4.5
Typical Quiescent Current (uA)1
Efficiency (%)93(Min)
Minimum Operating Temperature (°C)-40
Maximum Operating Temperature (°C)125
Supplier Temperature GradeIndustrial
PackagingTape and Reel
Pin Count10
Standard Package NameSOP
Supplier PackageMSOP EP
MountingSurface Mount
Package Height0.86
Package Length3
Package Width3
PCB changed10
Lead ShapeGull-wing
FEATURES
n
n
LT8609/LT8609A/LT8609B
42V, 3A Synchronous Step-Down
Regulator with 2.5µA Quiescent Current
DESCRIPTION
The
LT
®
8609/LT8609A/LT8609B
is a compact, high effi-
ciency, high speed synchronous monolithic step-down
switching regulator that consumes only 1.7µA of non-
switching quiescent current. The LT8609/LT8609A/
LT8609B can deliver 3A of continuous current. Burst Mode
operation enables high efficiency down to very low output
currents while keeping the output ripple below 10mV
P-P
.
A SYNC pin allows synchronization to an external clock, or
spread spectrum modulation for low EMI operation. Internal
compensation with peak current mode topology allows the
use of small inductors and results in fast transient response
and good loop stability. The EN/UV pin has an accurate
1V threshold and can be used to program V
IN
UVLO or to
shut down the part. A capacitor on the TR/SS pin programs
the output voltage ramp rate during start-up while the PG
flag signals when V
OUT
is within ±8.5% on the adjustable
output parts or ±7.5% on the fixed output parts of the
programmed output voltage as well as fault conditions.
The LT8609A has slower switch edges for lower EMI emis-
sions. The LT8609B operates in pulse-skipping mode only.
PULSE-SKIPPING MODE,
Burst Mode OPERATION
LT8609
LT8609A
LT8609B
Both
Both
Pulse-Skipping
SWITCH EDGE SPEED
Fast
Medium
Fast
n
n
n
n
n
n
n
n
n
n
n
n
n
n
Wide Input Voltage Range: 3.0V to 42V
Ultralow Quiescent Current Burst Mode
®
Operation:
n
<2.5µA I Regulating 12V to 3.3V
Q
IN
OUT
n
Output Ripple <10mV
P-P
High Efficiency 2MHz Synchronous Operation:
n
>93% Efficiency at 1A, 5V
OUT
from 12V
IN
3A Maximum Continuous Output
Fast Minimum Switch-On Time: 45ns
LT8609A Available in Fixed 3.3V and 5V Output
Adjustable and Synchronizable: 200kHz to 2.2MHz
Spread Spectrum Frequency Modulation for Low EMI
Allows Use of Small Inductors
Low Dropout
Peak Current Mode Operation
Accurate 1V Enable Pin Threshold
Internal Compensation
Output Soft-Start and Tracking
Small 10-Lead MSOP Package, 16-Lead MSOP Pack-
age, or 10-Lead 3mm × 3mm DFN Package with Side
Wettable Flanks
AEC-Q100 Qualified for Automotive Applications
APPLICATIONS
n
n
n
GSM Transceivers
General Purpose Step-Down
Low EMI Step-Down
All registered trademarks and trademarks are the property of their respective owners.
TYPICAL APPLICATION
5V, 2MHz Step-Down
V
IN
6V TO 40V
4.7µF ON OFF
V
IN
BST
EN/UV
SW
SYNC
LT8609A
INTV
CC
PG
TR/SS
FB
RT
GND
0.1µF 2.2µH
10pF
1M
187k
8609 TA01a
12V
IN
to 5V
OUT
Efficiency
100
95
90
EFFICIENCY (%)
V
OUT
5V
3A
85
80
75
70
65
60
55
50
0.00
0.50
1.00
1.50 2.00
I
OUT
(A)
2.50
3
Rev. I
L = 2.2µH
f
SW
= 2MHz
1µF
18.2k
22µF
8609 TA01b
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Description Conv DC-DC 3V to 42V Synchronous Step Down Single-Out 0.8V to 41.5V 3A Automotive 10-Pin MSOP EP T/R Conv DC-DC 3V to 42V Synchronous Step Down Single-Out 0.8V to 41.5V 3A Automotive 10-Pin MSOP EP Tube Conv DC-DC 3V to 42V Synchronous Step Down Single-Out 0.8V to 41.5V 3A Automotive 10-Pin MSOP EP T/R Conv DC-DC 3V to 42V Synchronous Step Down Single-Out 0.8V to 41.5V 3A Automotive 10-Pin MSOP EP Tube Conv DC-DC 3V to 42V Synchronous Step Down Single-Out 0.8V to 41.5V 3A Automotive 10-Pin MSOP EP T/R Conv DC-DC 3V to 42V Synchronous Step Down Single-Out 0.8V to 41.5V 3A Automotive 10-Pin MSOP EP Tube Conv DC-DC 3V to 42V Synchronous Step Down Single-Out 0.8V to 41.5V 3A Automotive 10-Pin MSOP EP T/R Conv DC-DC 3V to 42V Synchronous Step Down Single-Out 0.8V to 41.5V 3A Automotive 10-Pin MSOP EP Tube Conv DC-DC 3V to 42V Synchronous Step Down Single-Out 0.8V to 41.5V 3A Automotive 10-Pin MSOP EP T/R
EU restricts the use of certain hazardous substances Compliant Compliant Compliant Compliant Compliant Compliant Compliant Compliant Compliant
ECCN (US) EAR99 EAR99 EAR99 EAR99 EAR99 EAR99 EAR99 EAR99 EAR99
Part Status Active Active Active Active Active Active Active Active Active
HTS 8542.39.00.01 8542.39.00.01 8542.39.00.01 8542.39.00.01 8542.39.00.01 8542.39.00.01 8542.39.00.01 8542.39.00.01 8542.39.00.01
Type Synchronous Step Down Synchronous Step Down Synchronous Step Down Synchronous Step Down Synchronous Step Down Synchronous Step Down Synchronous Step Down Synchronous Step Down Synchronous Step Down
Output Type Adjustable Adjustable Adjustable Adjustable Adjustable Adjustable Adjustable Adjustable Adjustable
Switching Frequency (kHz) 200 to 2200 200 to 2200 200 to 2200 200 to 2200 200 to 2200 200 to 2200 200 to 2200 200 to 2200 200 to 2200
Switching Regulator Yes Yes Yes Yes Yes Yes Yes Yes Yes
Number of Outputs 1 1 1 1 1 1 1 1 1
Output Voltage (V) 0.8 to 41.5 0.8 to 41.5 0.8 to 41.5 0.8 to 41.5 0.8 to 41.5 0.8 to 41.5 0.8 to 41.5 0.8 to 41.5 0.8 to 41.5
Maximum Output Current (A) 3 3 3 3 3 3 3 3 3
Minimum Input Voltage (V) 3 3 3 3 3 3 3 3 3
Maximum Input Voltage (V) 42 42 42 42 42 42 42 42 42
Operating Supply Voltage (V) 3 to 42 3 to 42 3 to 42 3 to 42 3 to 42 3 to 42 3 to 42 3 to 42 3 to 42
Typical Switch Current (A) 4.5 4.5 4.5 4.5 4.5 4.5 4.5 4.5 4.5
Typical Quiescent Current (uA) 1 1 1 1 1 1 1 1 1
Efficiency (%) 93(Min) 93(Min) 93(Min) 93(Min) 93(Min) 93(Min) 93(Min) 93(Min) 93(Min)
Minimum Operating Temperature (°C) -40 -40 -40 -40 -40 -40 -40 -40 -40
Maximum Operating Temperature (°C) 125 125 125 125 125 150 150 125 125
Supplier Temperature Grade Industrial Extended Extended Industrial Extended Automotive Automotive Industrial Industrial
Packaging Tape and Reel Tube Tape and Reel Tube Tape and Reel Tube Tape and Reel Tube Tape and Reel
Pin Count 10 10 10 10 10 10 10 10 10
Standard Package Name SOP SOP SOP SOP SOP SOP SOP SOP SOP
Supplier Package MSOP EP MSOP EP MSOP EP MSOP EP MSOP EP MSOP EP MSOP EP MSOP EP MSOP EP
Mounting Surface Mount Surface Mount Surface Mount Surface Mount Surface Mount Surface Mount Surface Mount Surface Mount Surface Mount
Package Height 0.86 0.86 0.86 0.86 0.86 0.86 0.86 0.86 0.86
Package Length 3 3 3 3 3 3 3 3 3
Package Width 3 3 3 3 3 3 3 3 3
PCB changed 10 10 10 10 10 10 10 10 10
Lead Shape Gull-wing Gull-wing Gull-wing Gull-wing Gull-wing Gull-wing Gull-wing Gull-wing Gull-wing

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