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LTC3523EUD#TRPBF

Description
Synchronous 600mA Step-Up and 400mA Step-Down DC/DC Converters
CategoryPower/power management    The power supply circuit   
File Size252KB,16 Pages
ManufacturerADI
Websitehttps://www.analog.com
Environmental Compliance
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LTC3523EUD#TRPBF Overview

Synchronous 600mA Step-Up and 400mA Step-Down DC/DC Converters

LTC3523EUD#TRPBF Parametric

Parameter NameAttribute value
Brand NameAnalog Devices Inc
Is it lead-free?Contains lead
Is it Rohs certified?conform to
Objectid4002724440
package instruction3 X 3 MM, 0.75 MM HEIGHT, LEAD FREE, PLASTIC, MO-220WEED-2, QFN-16
Contacts16
Manufacturer packaging code05-08-1691
Reach Compliance Codecompliant
Country Of OriginMalaysia
Samacsys DescriptionIC REG BCK BST ADJ DL SYNC 16QFN
Samacsys ManufacturerAnalog Devices
Samacsys Modified On2023-03-07 16:10:32
YTEOL8.5
Analog Integrated Circuits - Other TypesDUAL SWITCHING CONTROLLER
control modeCURRENT-MODE
Control TechnologyPULSE WIDTH MODULATION
Maximum input voltage5.5 V
Minimum input voltage1.8 V
Nominal input voltage2.4 V
JESD-30 codeS-PQCC-N16
JESD-609 codee3
length3 mm
Humidity sensitivity level1
Number of functions1
Number of terminals16
Maximum operating temperature85 °C
Minimum operating temperature
Maximum output current1 A
Package body materialPLASTIC/EPOXY
encapsulated codeHVQCCN
Package shapeSQUARE
Package formCHIP CARRIER, HEAT SINK/SLUG, VERY THIN PROFILE
Peak Reflow Temperature (Celsius)260
Certification statusNot Qualified
Maximum seat height0.8 mm
surface mountYES
Switch configurationBUCK-BOOST
Maximum switching frequency1500 kHz
Temperature levelOTHER
Terminal surfaceMatte Tin (Sn)
Terminal formNO LEAD
Terminal pitch0.5 mm
Terminal locationQUAD
Maximum time at peak reflow temperature30
width3 mm
LTC3523/LTC3523-2
Synchronous 600mA Step-Up
and 400mA Step-Down
DC/DC Converters
FEATURES
n
DESCRIPTION
The LTC
®
3523/LTC3523-2 combine a 600mA step-up
DC/DC converter with a 400mA synchronous step-down
DC/DC converter in a tiny 3mm
×
3mm package. The
1.2MHz/2.4MHz switching frequencies minimize the
solution footprint while maintaining high efficiency. Both
converters feature soft-start and internal compensation,
simplifying the design.
Both the step-up and step-down converters are current
mode controlled and utilize an internal synchronous rec-
tifier for high efficiency. The step-up supports 0% duty
cycle operation and the step-down converter supports
100% duty cycle operation to extend battery run time.
If the MODE pin is held high, both converters automati-
cally transition between Burst Mode operation and PWM
operation improving light load efficiency. Fixed, low noise
1.2MHz/2.4MHz PWM operation is selected when MODE
is grounded.
The LTC3523/LTC3523-2 provide a sub-3μA shutdown
mode, overtemperature shutdown and current limit pro-
tection on both converters. The LTC3523/LTC3523-2 are
housed in a 16-lead 3mm
×
3mm
×
0.75mm QFN package.
L,
LT, LTC, LTM and Burst Mode are registered trademarks of Linear Technology Corporation.
All other trademarks are the property of their respective owners.
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Dual High Efficiency DC/DC Converters:
Step-Up (V
OUT
= 1.8V to 5.25V, I
SW
= 600mA)
Step-Down (V
OUT
= 0.615V to 5.5V, I
OUT
= 400mA)
1.8V to 5.5V Input Voltage Range
Up to 94% Efficiency
Pin Selectable Burst Mode
®
Operation
45μA Quiescent Current in Burst Mode Operation
1.2MHz (LTC3523) or 2.4MHz (LTC3523-2)
Switching Frequency
Independent Power Good Indicator Outputs
Integrated Soft-Start
Thermal and Overcurrent Protection
<3μA Quiescent Current in Shutdown
Small 16-Lead 3mm
×
3mm
×
0.75mm QFN Package
APPLICATIONS
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Digital Cameras
Medical Instruments
Industrial Handhelds
GPS Navigators
TYPICAL APPLICATION
LTC3523 Efficiency and Power
Loss vs Load Current
V
IN
1.8V TO 3.2V
2-CELL
ALKALINE
+
47μF
4.7μH
V
IN1
V
IN2
V
BAT
SW2
10pF
V
OUT
10μF
634k
365k
FB1
PGOOD1
SHDN1
LTC3523
FB2
MODE
PGOOD2
SHDN2
V
IN
511k
511k
4.7μH
SW1
V
OUT2
STEP-DOWN
OUTPUT
10μF 1.2V
200mA
100
90
80
EFFICIENCY (%)
70
60
50
40
30
20
10
OFF ON
OFF ON
3523 TA01a
1000
EFFICIENCY
100
POWER LOSS (mW)
V
OUT1
STEP-UP
OUTPUT
3.3V
200mA
P0WER LOSS
V
IN
= 2.4V
V
OUT1
= 3.3V
V
OUT2
= 1.2V
f
OSC
= 1.2MHz
STEP-UP
STEP-DOWN
1
10
100
LOAD CURRENT (mA)
10
GND1 GND2 GND3
1
0
0.1
0.1
1000
3523 TA01b
3523fb
1

LTC3523EUD#TRPBF Related Products

LTC3523EUD#TRPBF LTC3523EUD#PBF LTC3523EUD-2#PBF LTC3523EUD-2#TRPBF
Description Synchronous 600mA Step-Up and 400mA Step-Down DC/DC Converters Synchronous 600mA Step-Up and 400mA Step-Down DC/DC Converters Synchronous 600mA Step-Up and 400mA Step-Down DC/DC Converters Synchronous 600mA Step-Up and 400mA Step-Down DC/DC Converters
Brand Name Analog Devices Inc Analog Devices Inc Analog Devices Inc Analog Devices Inc
Is it lead-free? Contains lead Contains lead Contains lead Contains lead
Is it Rohs certified? conform to conform to conform to conform to
Objectid 4002724440 4002735239 4002725077 4002720184
package instruction 3 X 3 MM, 0.75 MM HEIGHT, LEAD FREE, PLASTIC, MO-220WEED-2, QFN-16 3 X 3 MM, 0.75 MM HEIGHT, LEAD FREE, PLASTIC, MO-220WEED-2, QFN-16 3 X 3 MM, 0.75 MM HEIGHT, LEAD FREE, PLASTIC, MO-220WEED-2, QFN-16 3 X 3 MM, 0.75 MM HEIGHT, LEAD FREE, PLASTIC, MO-220WEED-2, QFN-16
Contacts 16 16 16 16
Manufacturer packaging code 05-08-1691 05-08-1691 05-08-1691 05-08-1691
Reach Compliance Code compliant compliant compliant compliant
Country Of Origin Malaysia Malaysia Malaysia Malaysia
Samacsys Description IC REG BCK BST ADJ DL SYNC 16QFN LINEAR TECHNOLOGY - LTC3523EUD#PBF - IC, DC DC CONV, 600/400MA, 16QFN LINEAR TECHNOLOGY - LTC3523EUD-2#PBF - IC, DC DC CONV, 600/400MA, 16QFN IC REG BCK BST ADJ DL SYNC 16QFN
Samacsys Manufacturer Analog Devices Analog Devices Analog Devices Analog Devices
Samacsys Modified On 2023-03-07 16:10:32 2023-03-07 16:10:32 2023-03-07 16:10:32 2023-03-07 16:10:32
YTEOL 8.5 8.5 8.5 8.5
Analog Integrated Circuits - Other Types DUAL SWITCHING CONTROLLER DUAL SWITCHING CONTROLLER DUAL SWITCHING CONTROLLER DUAL SWITCHING CONTROLLER
control mode CURRENT-MODE CURRENT-MODE CURRENT-MODE CURRENT-MODE
Control Technology PULSE WIDTH MODULATION PULSE WIDTH MODULATION PULSE WIDTH MODULATION PULSE WIDTH MODULATION
Maximum input voltage 5.5 V 5.5 V 5.5 V 5.5 V
Minimum input voltage 1.8 V 1.8 V 1.8 V 1.8 V
Nominal input voltage 2.4 V 2.4 V 2.4 V 2.4 V
JESD-30 code S-PQCC-N16 S-PQCC-N16 S-PQCC-N16 S-PQCC-N16
JESD-609 code e3 e3 e3 e3
length 3 mm 3 mm 3 mm 3 mm
Humidity sensitivity level 1 1 1 1
Number of functions 1 1 1 1
Number of terminals 16 16 16 16
Maximum operating temperature 85 °C 85 °C 85 °C 85 °C
Maximum output current 1 A 1 A 1 A 1 A
Package body material PLASTIC/EPOXY PLASTIC/EPOXY PLASTIC/EPOXY PLASTIC/EPOXY
encapsulated code HVQCCN HVQCCN HVQCCN HVQCCN
Package shape SQUARE SQUARE SQUARE SQUARE
Package form CHIP CARRIER, HEAT SINK/SLUG, VERY THIN PROFILE CHIP CARRIER, HEAT SINK/SLUG, VERY THIN PROFILE CHIP CARRIER, HEAT SINK/SLUG, VERY THIN PROFILE CHIP CARRIER, HEAT SINK/SLUG, VERY THIN PROFILE
Peak Reflow Temperature (Celsius) 260 260 260 260
Certification status Not Qualified Not Qualified Not Qualified Not Qualified
Maximum seat height 0.8 mm 0.8 mm 0.8 mm 0.8 mm
surface mount YES YES YES YES
Switch configuration BUCK-BOOST BUCK-BOOST BUCK-BOOST BUCK-BOOST
Maximum switching frequency 1500 kHz 1500 kHz 2650 kHz 2650 kHz
Temperature level OTHER OTHER OTHER OTHER
Terminal surface Matte Tin (Sn) Matte Tin (Sn) Matte Tin (Sn) Matte Tin (Sn)
Terminal form NO LEAD NO LEAD NO LEAD NO LEAD
Terminal pitch 0.5 mm 0.5 mm 0.5 mm 0.5 mm
Terminal location QUAD QUAD QUAD QUAD
Maximum time at peak reflow temperature 30 30 30 30
width 3 mm 3 mm 3 mm 3 mm
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