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LT8610AIMSE-3.3#PBF

P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P21P22-P24P25-P26
LT8610A/LT8610AB Series
1
8610abfa
For more information www.linear.com/LT8610A
TYPICAL APPLICATION
FEATURES DESCRIPTION
42V, 3.5A Synchronous
Step-Down Regulator with
2.5µA Quiescent Current
The LT
®
8610A/LT8610AB series are compact, high ef-
ficiency, high
speed synchronous monolithic step-down
switching regulators that consume only 2.5µA of quies-
cent current
. Compared to the LT8610, they have higher
maximum
output currents of 3.5A and a faster minimum
switch-on time of 30ns. The LT8610A has the same low
ripple burst mode performance of the LT8610, while the
LT8610AB has even higher light load efficiency.
The other features of the LT8610 remain unchanged in the
LT8610A/LT8610AB series. A SYNC pin allows synchroni
-
zation to an external clock. The EN/UV pin has an accurate
1V
threshold for V
IN
undervoltage lockout or shut down.
A capacitor on the TR/SS pin programs the output voltage
ramp rate during startup. The PG flag signals when V
OUT
is within ±9% of the programmed output voltage as well
as fault conditions.
OUTPUT
CURRENT
MINIMUM
ON TIME
1mA LOAD
EFFICIENCY**
LT8610* 2.5A 50ns 82%
LT8610A 3.5A 30ns 82%
LT8610AB 3.5A 30ns 91%
*See LT8610 data sheet. **V
IN
= 12V, V
OUT
= 3.3V, L = 4.7µH
5V 3.5A Step-Down Converter
APPLICATIONS
n
LT8610 Feature Set, Plus:
3.5A Maximum Output Current
Fast 30ns Minimum Switch-On Time
Improved Burst Mode Efficiency (LT8610AB Only)
Improved EMI
n
Wide Input Voltage Range: 3.4V to 42V
n
Ultralow Quiescent Current Burst Mode
®
Operation:
2.5μA I
Q
Regulating 12V
IN
to 3.3V
OUT
n
Fixed Output Voltages: 3.3V, 5V
n
Output Ripple < 10mV
P-P
(LT8610A Only)
n
High Efficiency Synchronous Operation:
95% Efficiency at 1A, 5V
OUT
from 12V
IN
93% Efficiency at 1A, 3.3V
OUT
from 12V
IN
n
Low Dropout Under All Conditions: 200mV at 1A
n
Safely Tolerates Inductor Saturation in Overload
n
Adjustable and Synchronizable Frequency:
200kHz to 2.2MHz
n
Accurate 1V Enable Pin Threshold
n
Output Soft-Start and Tracking
n
Small Thermally Enhanced 16-Lead MSOP Package
n
Automotive and Industrial Supplies
n
GSM Power Supplies
L, LT , LT C , LT M , Burst Mode, Linear Technology and the Linear logo are registered trademarks
of Linear Technology Corporation. All other trademarks are the property of their respective
owners.
BSTV
IN
EN/UV
PG
SYNC
INTV
CC
TR/SS
RT
SW
LT8610AB-5
GND
BIAS
8610ab TA01a
V
OUT
0.1µF
V
OUT
5V
3.5A
4.7µF
V
IN
5.5V TO 42V
1µF
10nF
4.7µH
f
SW
= 700kHz
60.4k
47µF
×2
LT8610AB Efficiency at 5V
OUT
0.1 1 100010010
LOAD CURRENT (mA)
EFFICIENCY (%)
80
90
100
8610ab TA01b
70
50
60
40
30
V
IN
= 12V
V
IN
= 24V
V
IN
= 36V
LT8610A/LT8610AB Series
2
8610abfa
For more information www.linear.com/LT8610A
ABSOLUTE MAXIMUM RATINGS
V
IN
, EN/UV, PG ..........................................................42V
BIAS .......................................................................... 30V
BST Pin Above SW Pin................................................4V
FB, TR/SS, RT, INTV
CC
. ..............................................4V
V
OUT
, SYNC Voltage . ..................................................6V
Operating Junction Temperature Range (Note 2)
LT8610AE/LT8610ABE ........................... –40 to 125°C
LT8610AI/LT8610ABI ............................. –40 to 125°C
LT8610AH/LT8610ABH ..........................–40 to 150°C
Storage Temperature Range ......................–65 to 150°C
(Note 1)
ORDER INFORMATION
LEAD FREE FINISH TAPE AND REEL PART MARKING* PACKAGE DESCRIPTION TEMPERATURE RANGE
LT8610AEMSE#PBF LT8610AEMSE#TRPBF 8610A 16-Lead Plastic MSOP –40°C to 125°C
LT8610AEMSE-3.3#PBF LT8610AEMSE-3.3#TRPBF 610A33 16-Lead Plastic MSOP –40°C to 125°C
LT8610AEMSE-5#PBF LT8610AEMSE-5#TRPBF 8610A5 16-Lead Plastic MSOP –40°C to 125°C
LT8610AIMSE#PBF LT8610AIMSE#TRPBF 8610A 16-Lead Plastic MSOP –40°C to 125°C
LT8610AIMSE-3.3#PBF LT8610AIMSE-3.3#TRPBF 610A33 16-Lead Plastic MSOP –40°C to 125°C
LT8610AIMSE-5#PBF LT8610AIMSE-5#TRPBF 8610A5 16-Lead Plastic MSOP –40°C to 125°C
LT8610AHMSE#PBF LT8610AHMSE#TRPBF 8610A 16-Lead Plastic MSOP –40°C to 150°C
LT8610AHMSE-3.3#PBF LT8610AHMSE-3.3#TRPBF 610A33 16-Lead Plastic MSOP –40°C to 150°C
LT8610AHMSE-5#PBF LT8610AHMSE-5#TRPBF 8610A5 16-Lead Plastic MSOP –40°C to 150°C
LT8610ABEMSE#PBF LT8610ABEMSE#TRPBF 8610AB 16-Lead Plastic MSOP –40°C to 125°C
LT8610ABEMSE-3.3#PBF LT8610ABEMSE-3.3#TRPBF 10AB33 16-Lead Plastic MSOP –40°C to 125°C
LT8610ABEMSE-5#PBF LT8610ABEMSE-5#TRPBF 610AB5 16-Lead Plastic MSOP –40°C to 125°C
LT8610ABIMSE#PBF LT8610ABIMSE#TRPBF 8610AB 16-Lead Plastic MSOP –40°C to 125°C
LT8610ABIMSE-3.3#PBF LT8610ABIMSE-3.3#TRPBF 10AB33 16-Lead Plastic MSOP –40°C to 125°C
LT8610ABIMSE-5#PBF LT8610ABIMSE-5#TRPBF 610AB5 16-Lead Plastic MSOP –40°C to 125°C
LT8610ABHMSE#PBF LT8610ABHMSE#TRPBF
8610AB 16-Lead Plastic MSOP –40°C to 150°C
LT8610ABHMSE-3.3#PBF
LT8610ABHMSE-3.3#TRPBF 10AB33 16-Lead Plastic MSOP –40°C to 150°C
LT8610ABHMSE-5#PBF LT8610ABHMSE-5#TRPBF 610AB5 16-Lead Plastic MSOP –40°C to 150°C
Consult LT C Marketing for parts specified with wider operating temperature ranges. *The temperature grade is identified by a label on the shipping container.
Consult LT C 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/
LT8610A, LT8610AB LT8610A-3.3, LT8610A-5, LT8610AB-3.3, LT8610AB-5
1
2
3
4
5
6
7
8
SYNC
TR/SS
RT
EN/UV
V
IN
V
IN
NC
GND
16
15
14
13
12
11
10
9
FB
PG
BIAS
INTV
CC
BST
SW
SW
SW
TOP VIEW
17
GND
MSE PACKAGE
16-LEAD PLASTIC MSOP
θ
JA
= 40°C/W, θ
JC(PAD)
= 10°C/W
EXPOSED PAD (PIN 17) IS GND, MUST BE SOLDERED TO PCB
1
2
3
4
5
6
7
8
SYNC
TR/SS
RT
EN/UV
V
IN
V
IN
NC
GND
16
15
14
13
12
11
10
9
V
OUT
PG
BIAS
INTV
CC
BST
SW
SW
SW
TOP VIEW
17
GND
MSE PACKAGE
16-LEAD PLASTIC MSOP
θ
JA
= 40°C/W, θ
JC(PAD)
= 10°C/W
EXPOSED PAD (PIN 17) IS GND, MUST BE SOLDERED TO PCB
PIN CONFIGURATION
LT8610A/LT8610AB Series
3
8610abfa
For more information www.linear.com/LT8610A
ELECTRICAL CHARACTERISTICS
The l denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T
A
= 25°C.
PARAMETER CONDITIONS MIN TYP MAX UNITS
Minimum Input Voltage (Note 4)
l
2.9 3.4 V
V
IN
Quiescent Current V
EN/UV
= 0V
l
1.0
1.0
3
8
µA
µA
V
EN/UV
= 2V, Not Switching, V
SYNC
= 0V
l
1.7
1.7
4
10
µA
µA
V
EN/UV
= 2V, Not Switching, V
SYNC
= 2V 0.26 0.5 mA
V
IN
Current in Regulation V
OUT
= 0.97V, V
IN
= 6V, Output Load = 100µA (LT8610A)
V
OUT
= 0.97V, V
IN
= 6V, Output Load = 1mA (LT8610A)
V
OUT
= 0.97V, V
IN
= 6V, Output Load = 100µA (LT8610AB)
V
OUT
= 0.97V, V
IN
= 6V, Output Load = 1mA (LT8610AB)
l
l
l
l
24
210
24
210
50
350
50
350
µA
µA
µA
µA
V
IN
Current in Regulation V
OUT
= 3.3V, V
IN
= 8V, Output Load = 100µA (LT8610A-3.3)
V
OUT
= 3.3V, V
IN
= 8V, Output Load = 1mA (LT8610A-3.3)
V
OUT
= 3.3V, V
IN
= 8V, Output Load = 100µA (LT8610AB-3.3)
V
OUT
= 3.3V, V
IN
= 8V, Output Load = 1mA (LT8610AB-3.3)
V
OUT
= 5V, V
IN
= 8V, Output Load = 100µA (LT8610A-5)
V
OUT
= 5V, V
IN
= 8V, Output Load = 1mA (LT8610A-5)
V
OUT
= 5V, V
IN
= 8V, Output Load = 100µA (LT8610AB-5)
V
OUT
= 5V, V
IN
= 8V, Output Load = 1mA (LT8610AB-5)
l
l
l
l
l
l
l
l
60
540
55
500
100
790
80
730
120
900
100
800
180
1200
150
1100
µ
A
µA
µA
µA
µA
µA
µA
µA
Feedback
Reference V
oltage
(LT8610A/LT8610AB)
V
IN
= 6V, I
LOAD
= 0.5A
V
IN
= 6V, I
LOAD
= 0.5A
l
0.964
0.958
0.970
0.970
0.976
0.982
V
V
Output V
oltage
(LT8610A-3.3/LT8610AB-3.3)
V
IN
= 8V, I
LOAD
= 0.5A
V
IN
= 8V, I
LOAD
= 0.5A
l
3.28
3.26
3.30
3.30
3.32
3.34
V
V
Output V
oltage
(LT8610A-5/LT8610AB-5)
V
IN
= 8V, I
LOAD
= 0.5A
V
IN
= 8V, I
LOAD
= 0.5A
l
4.97
4.94
5.00
5.00
5.03
5.06
V
V
Feedback V
oltage Line Regulation
(LT8610A/LT8610AB)
V
IN
= 4V to 42V, I
LOAD
= 1A
l
0.004 0.02 %/V
Voltage Line Regulation
(LT8610A-3.3/LT8610AB-3.3)
V
IN
= 4V to 42V, I
LOAD
= 1A
l
0.004 0.02 %/V
Voltage Line Regulation
(LT8610A-5/LT8610AB-5)
V
IN
= 6V to 42V, I
LOAD
= 1A
l
0.004 0.02 %/V
Feedback Pin Input Current
(LT8610A/LT8610AB)
V
FB
= 1V –20 20 nA
Internal Feedback Resistor Divider
(LT8610A-3.3/LT8610AB-3.3)
14.3 MΩ
Internal Feedback Resistor Divider
(LT8610A-5/LT8610AB-5)
12.5 MΩ
INT
V
CC
Voltage I
LOAD
= 0mA, V
BIAS
= 0V
I
LOAD
= 0mA, V
BIAS
= 3.3V
3.23
3.25
3.4
3.29
3.57
3.35
V
V
INTV
CC
Undervoltage Lockout 2.5 2.6 2.7 V
BIAS Pin Current Consumption V
BIAS
= 3.3V, I
LOAD
= 1A, 2MHz 9 mA
Minimum On-Time I
LOAD
= 1A, SYNC = 0V
I
LOAD
= 1A, SYNC = 3.3V
l
l
15
15
30
30
45
45
ns
ns
Minimum Off-T
ime 95 125 ns
P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P21P22-P24P25-P26

LT8610AIMSE-3.3#PBF

Mfr. #:
Buy LT8610AIMSE-3.3#PBF
Manufacturer:
Analog Devices / Linear Technology
Description:
Switching Voltage Regulators 42V, 3.5A Synchronous Step-Down Regulator with 2.5uA Quiescent Current
Lifecycle:
New from this manufacturer.
Delivery:
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