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LTC3335EUDC#TRPBF

Description
Conv DC-DC 1.8V to 5.5V Synchronous Step Down/Synchronous Step Up Single-Out 1.8V 0.05A 20-Pin QFN EP T/R
File Size505KB,28 Pages
ManufacturerADI
Websitehttps://www.analog.com
Download Datasheet Parametric Compare View All

LTC3335EUDC#TRPBF Overview

Conv DC-DC 1.8V to 5.5V Synchronous Step Down/Synchronous Step Up Single-Out 1.8V 0.05A 20-Pin QFN EP T/R

LTC3335EUDC#TRPBF Parametric

Parameter NameAttribute value
EU restricts the use of certain hazardous substancesCompliant
ECCN (US)EAR99
Part StatusActive
HTS8542.39.00.01
TypeSynchronous Step Up|Synchronous Step Down
Output TypeAdjustable
Switching RegulatorYes
Number of Outputs1
Output Voltage (V)1.8(Min)
Maximum Output Current (A)0.05
Minimum Input Voltage (V)1.8
Maximum Input Voltage (V)5.5
Efficiency (%)90
Minimum Operating Temperature (°C)-40
Maximum Operating Temperature (°C)125
Supplier Temperature GradeExtended
PackagingTape and Reel
Pin Count20
Standard Package NameQFN
Supplier PackageQFN EP
MountingSurface Mount
Package Height0.75(Max)
Package Length4
Package Width3
PCB changed20
Lead ShapeNo Lead
FeaTures
n
n
n
LTC3335
Nanopower Buck-Boost
DC/DC with Integrated
Coulomb Counter
DescripTion
The
LTC
®
3335
is a high efficiency, low quiescent current
(680nA) buck-boost DC/DC converter with an integrated
precision coulomb counter which monitors accumulated
battery discharge in long life battery powered applications.
The buck-boost can operate down to 1.8V on its input and
provides eight pin-selectable output voltages with up to
50mA of output current.
The coulomb counter stores the accumulated battery dis-
charge in an internal register accessible via an I
2
C interface.
The LTC3335 features a programmable discharge alarm
threshold. When the threshold is reached, an interrupt is
generated at the
IRQ
pin.
To accommodate a wide range of battery types and sizes,
the peak input current can be selected from as low as 5mA
to as high as 250mA and the full-scale coulomb counter
has a programmable range of 32,768:1.
The LTC3335 is available in a 3mm
×
4mm QFN-20 package.
L,
LT, LTC, LTM, Linear Technology, the Linear logo, SmartMesh and Dust Networks are
registered trademarks of Linear Technology Corporation. All other trademarks are the property
of their respective owners.
n
n
n
n
n
n
n
n
n
680nA Input Quiescent Current (Output in
Regulation at No Load)
1.8V to 5.5V Input Operating Range
Selectable Output Voltages of 1.8V, 2.5V, 2.8V,
3V, 3.3V, 3.6V, 4.5V, 5V
Integrated Coulomb Counter Measures
Accumulated Battery Discharge
±5% Battery Discharge Measurement Accuracy
Programmable Peak Input Current of 5mA, 10mA,
15mA, 25mA, 50mA, 100mA, 150mA, 250mA
Up to 50mA of Output Current
Up to 90% Efficiency
Programmable Coulomb Counter Prescaler for Wide
Range of Battery Sizes
Programmable Discharge Alarm Threshold
I
2
C Interface
Low Profile (0.75mm) 20-Lead (3mm
×
4mm) QFN
Package
applicaTions
n
n
n
n
Long Lifetime Primary Cell Battery Applications
Wireless Sensors
Remote Monitors
Dust Networks
®
SmartMesh
®
Applications
Typical applicaTion
2.2mH TO 47µH
100
I
PEAK
= 5mA TO 250mA
PRIMARY CELL
SW1
BAT
10µF
PBAT
EN
DV
CC
10k
I
2
C
3
3
10k
SCL
SDA
IPK[2:0]
OUT[2:0]
GND
3335 TA01
Efficiency vs Load for 100mA
I
PEAK
Setting
90
1.8V TO 5V
47µF
EFFICIENCY (%)
80
70
60
50
40
30
20 BAT = 3.6V
L = 150µH
10
DCR = 0.3
0
0.001
0.01
V
OUT
= 1.8V
V
OUT
= 2.5V
V
OUT
= 3.3V
V
OUT
= 5V
1
0.1
I
LOAD
(mA)
10
100
3335 TA01a
SW2
V
OUT
PV
OUT
+
LTC3335
IRQ
PGOOD
For more information
www.linear.com/LTC3335
1
3335f

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LTC3335EUDC#TRPBF LTC3335EUDC#PBF LTC3335IUDC#PBF LTC3335IUDC#TRPBF
Description Conv DC-DC 1.8V to 5.5V Synchronous Step Down/Synchronous Step Up Single-Out 1.8V 0.05A 20-Pin QFN EP T/R Conv DC-DC 1.8V to 5.5V Synchronous Step Down/Synchronous Step Up Single-Out 1.8V 0.05A 20-Pin QFN EP Tube Conv DC-DC 1.8V to 5.5V Synchronous Step Down/Synchronous Step Up Single-Out 1.8V 0.05A 20-Pin QFN EP Tube Conv DC-DC 1.8V to 5.5V Synchronous Step Down/Synchronous Step Up Single-Out 1.8V 0.05A 20-Pin QFN EP T/R
EU restricts the use of certain hazardous substances Compliant Compliant Compliant Compliant
ECCN (US) EAR99 EAR99 EAR99 EAR99
Part Status Active Active Active Active
Type Synchronous Step Up|Synchronous Step Down Synchronous Step Down|Synchronous Step Up Synchronous Step Down|Synchronous Step Up Synchronous Step Down|Synchronous Step Up
Output Type Adjustable Adjustable Adjustable Adjustable
Switching Regulator Yes Yes Yes Yes
Number of Outputs 1 1 1 1
Output Voltage (V) 1.8(Min) 1.8(Min) 1.8(Min) 1.8(Min)
Maximum Output Current (A) 0.05 0.05 0.05 0.05
Minimum Input Voltage (V) 1.8 1.8 1.8 1.8
Maximum Input Voltage (V) 5.5 5.5 5.5 5.5
Efficiency (%) 90 90 90 90
Minimum Operating Temperature (°C) -40 -40 -40 -40
Maximum Operating Temperature (°C) 125 125 125 125
Supplier Temperature Grade Extended Extended Industrial Industrial
Packaging Tape and Reel Tube Tube Tape and Reel
Pin Count 20 20 20 20
Standard Package Name QFN QFN QFN QFN
Supplier Package QFN EP QFN EP QFN EP QFN EP
Mounting Surface Mount Surface Mount Surface Mount Surface Mount
Package Height 0.75(Max) 0.75(Max) 0.75(Max) 0.75(Max)
Package Length 4 4 4 4
Package Width 3 3 3 3
PCB changed 20 20 20 20
Lead Shape No Lead No Lead No Lead No Lead
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