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LTC3537EUD#PBF

Description
Step Up DC to DC Converter with LDO to 16-Pin QFN EP Tube
File Size325KB,22 Pages
ManufacturerADI
Websitehttps://www.analog.com
Download Datasheet Parametric Compare View All

LTC3537EUD#PBF Overview

Step Up DC to DC Converter with LDO to 16-Pin QFN EP Tube

LTC3537EUD#PBF Parametric

Parameter NameAttribute value
EU restricts the use of certain hazardous substancesCompliant
ECCN (US)EAR99
Part StatusActive
HTS8542.39.00.01
FunctionStep Up DC to DC Converter with LDO
Switching Frequency (kHz)2000 to 2400
Input Voltage (V)1.8 to 5.5
Minimum Operating Temperature (°C)-40
Maximum Operating Temperature (°C)85
Supplier Temperature GradeExtended
PackagingTube
Maximum Storage Temperature (°C)125
Minimum Storage Temperature (°C)-65
Standard Package NameQFN
Pin Count16
Supplier PackageQFN EP
MountingSurface Mount
Package Height0.75(Max)
Package Length3
Package Width3
PCB changed16
Lead ShapeNo Lead
LTC3537
2.2 MHz, 600mA
Synchronous Step-Up DC/DC
Converter and 100mA LDO
FEATURES
n
DESCRIPTION
The LTC
®
3537 combines a high efficiency, 2.2MHz step-up
DC/DC converter with an independent 100mA low dropout
regulator (LDO). The step-up converter starts from an input
voltage as low as 0.68V and contains an internal 0.4Ω
switch and a 0.6Ω synchronous rectifier that disconnects
from the output when disabled in shutdown.
A switching frequency of 2.2MHz minimizes solution
footprint by allowing the use of tiny, low profile inductors
and ceramic capacitors. The current mode PWM design
is internally compensated, reducing external parts count.
Fixed frequency switching is maintained until a light load
current is sensed, at which point Burst Mode
®
operation is
engaged to maximize efficiency. For low noise operation,
Burst Mode Operation can be disabled. Anti-ring circuitry
reduces EMI by damping the inductor in discontinuous
mode. Additional features include a low shutdown current
of under 1μA and thermal overload protection.
The integrated LDO regulator provides a very low noise,
programmable low dropout supply.
L,
LT, LTC, LTM and Burst Mode are registered trademarks of Linear Technology Corporation.
All other trademarks are the property of their respective owners.
High Efficiency Step-Up DC/DC Converter and LDO
Step-Up
n
V : 0.68V to 5V, V
IN
OUT
: 1.5V to 5.25V
I
OUT
: 100mA at 3.3V, V
IN
>0.8V
n
2.2MHz Fixed Frequency Operation
n
Synchronous Rectifier with Output Disconnect
n
Burst Mode Operation (Pin Selectable)
Linear LDO Regulator
n
V : 1.8V to 5.5V, V
IN
OUT
: 0.6V to 5V
I
OUT
: 100mA
n
100mV Dropout Voltage at 50mA
n
24dB Ripple Rejection at f
SW
Combined
n
Power Good Indicators
n
Low-Battery Comparator
n
30μA I
Q
n
Low Profile 3mm
×
3mm
×
0.75mm Package
APPLICATIONS
n
n
n
n
Wireless Microphones
Portable Medical instruments
Noise Cancelling/Portable Headsets
RF and Audio Power
TYPICAL APPLICATION
Efficiency and Power Loss
vs Load Current
2.2μH
R6
665k
ALKALINE
0.8V
TO
1.6V
+
R5
1.0M
1μF
OFF ON
PWM BURST
SW
V
OUTB
3.3V
10μF
V
OLDO
3V
1μF
R1
1M
R3
511k
3537 TA01a
100
90
1000
V
INB
V
OUTB
R2
1.74M
33pF
80
EFFICIENCY (%)
70
60
50
40
30
20
10
0
0.01
0.1
EFFICIENCY
100
POWER LOSS (mW)
LBI LTC3537 V
INL
LBO
FBB
PGDB
PGDL
V
OLDO
ENLDO
ENBST
MODE
FBL
SGND PGND
10
R4
2.05M
POWER LOSS
1
0.1
V
INB
, MODE = 1.8V
10
1
100
LOAD CURRENT (mA)
0.01
1000
3537 TA01b
3537fd
1

LTC3537EUD#PBF Related Products

LTC3537EUD#PBF LTC3537EUD#TRPBF
Description Step Up DC to DC Converter with LDO to 16-Pin QFN EP Tube Step Up DC to DC Converter with LDO to 16-Pin QFN EP T/R
EU restricts the use of certain hazardous substances Compliant Compliant
ECCN (US) EAR99 EAR99
Part Status Active Active
Function Step Up DC to DC Converter with LDO Step Up DC to DC Converter with LDO
Switching Frequency (kHz) 2000 to 2400 2000 to 2400
Input Voltage (V) 1.8 to 5.5 1.8 to 5.5
Minimum Operating Temperature (°C) -40 -40
Maximum Operating Temperature (°C) 85 85
Supplier Temperature Grade Extended Extended
Packaging Tube Tape and Reel
Maximum Storage Temperature (°C) 125 125
Minimum Storage Temperature (°C) -65 -65
Standard Package Name QFN QFN
Pin Count 16 16
Supplier Package QFN EP QFN EP
Mounting Surface Mount Surface Mount
Package Height 0.75(Max) 0.75(Max)
Package Length 3 3
Package Width 3 3
PCB changed 16 16
Lead Shape No Lead No Lead
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