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Switching Converter. ADP1612 Datasheet

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Switching Converter. ADP1612 Datasheet






ADP1612 Converter. Datasheet pdf. Equivalent




ADP1612 Converter. Datasheet pdf. Equivalent





Part

ADP1612

Description

PWM DC-to-DC Switching Converter



Feature


Data Sheet 650 kHz /1.3 MHz Step-Up PWM DC-to-DC Switching Converters ADP1612/ ADP1613 FEATURES Current limit 1.4 A f or the ADP1612 2.0 A for the ADP 1613 M inimum input voltage 1.8 V for the ADP1 612 2.5 V for the ADP1613 Pin-selectabl e 650 kHz or 1.3 MHz PWM frequency Adju stable output voltage up to 20 V Adjust able soft start Undervoltage lockout Th ermal shutdown 8-l.
Manufacture

Analog Devices

Datasheet
Download ADP1612 Datasheet


Analog Devices ADP1612

ADP1612; ead MSOP Supported by ADIsimPower™ des ign tool ADIsimPower downloadable desig n tools for boost, coupled- SEPIC, and SEPIC Cuk configurations APPLICATIONS T FT LCD bias supplies Portable applicati ons Industrial/instrumentation equipmen t TYPICAL APPLICATION CIRCUIT L1 ADP1 612/ VIN ADP1613 6 VIN SW 5 ON OFF 3 EN CIN 1.3MHz 650kHz 7 FREQ (DE FAULT) FB 2 8 SS .


Analog Devices ADP1612

COMP 1 CSS GND 4 D1 VOUT R1 R2 RCOM P CCOMP COUT Figure 1. Step-Up Regula tor Configuration 06772-001 GENERAL D ESCRIPTION The ADP1612/ADP1613 are step -up dc-to-dc switching converters with an integrated power switch capable of p roviding an output voltage as high as 2 0 V. With a package height of less than 1.1 mm, the ADP1612/ADP1613 are optima l for spaceconstra.


Analog Devices ADP1612

ined applications such as portable devic es or thin film transistor (TFT) liquid crystal displays (LCDs). The ADP1612/A DP1613 operate in current mode pulse-wi dth modulation (PWM) with up to 94% eff iciency. Adjustable soft start prevents inrush currents when the part is enabl ed. The pin-selectable switching freque ncy and PWM current-mode architecture a llow for excellent.

Part

ADP1612

Description

PWM DC-to-DC Switching Converter



Feature


Data Sheet 650 kHz /1.3 MHz Step-Up PWM DC-to-DC Switching Converters ADP1612/ ADP1613 FEATURES Current limit 1.4 A f or the ADP1612 2.0 A for the ADP 1613 M inimum input voltage 1.8 V for the ADP1 612 2.5 V for the ADP1613 Pin-selectabl e 650 kHz or 1.3 MHz PWM frequency Adju stable output voltage up to 20 V Adjust able soft start Undervoltage lockout Th ermal shutdown 8-l.
Manufacture

Analog Devices

Datasheet
Download ADP1612 Datasheet




 ADP1612
Data Sheet
650 kHz /1.3 MHz Step-Up
PWM DC-to-DC Switching Converters
ADP1612/ADP1613
FEATURES
Current limit
1.4 A for the ADP1612
2.0 A for the ADP 1613
Minimum input voltage
1.8 V for the ADP1612
2.5 V for the ADP1613
Pin-selectable 650 kHz or 1.3 MHz PWM frequency
Adjustable output voltage up to 20 V
Adjustable soft start
Undervoltage lockout
Thermal shutdown
8-lead MSOP
Supported by ADIsimPower™ design tool
ADIsimPower downloadable design tools for boost, coupled-
SEPIC, and SEPIC Cuk configurations
APPLICATIONS
TFT LCD bias supplies
Portable applications
Industrial/instrumentation equipment
TYPICAL APPLICATION CIRCUIT
L1
ADP1612/
VIN ADP1613
6 VIN
SW 5
ON
OFF
3 EN
CIN 1.3MHz
650kHz
7 FREQ
(DEFAULT)
FB 2
8 SS
COMP 1
CSS
GND
4
D1 VOUT
R1
R2
RCOMP
CCOMP
COUT
Figure 1. Step-Up Regulator Configuration
GENERAL DESCRIPTION
The ADP1612/ADP1613 are step-up dc-to-dc switching con-
verters with an integrated power switch capable of providing
an output voltage as high as 20 V. With a package height of less
than 1.1 mm, the ADP1612/ADP1613 are optimal for space-
constrained applications such as portable devices or thin film
transistor (TFT) liquid crystal displays (LCDs).
The ADP1612/ADP1613 operate in current mode pulse-width
modulation (PWM) with up to 94% efficiency. Adjustable
soft start prevents inrush currents when the part is enabled.
The pin-selectable switching frequency and PWM current-mode
architecture allow for excellent transient response, easy noise
filtering, and the use of small, cost-saving external inductors
and capacitors. Other key features include undervoltage lockout
(UVLO), thermal shutdown (TSD), and logic controlled enable.
The ADP1612/ADP1613 are available in the lead-free
8-lead MSOP.
100
VIN = 5V
fSW = 1.3MHz
90 TA = 25°C
80
70
60
50
ADP1612, VOUT = 12V
40 ADP1612, VOUT = 15V
ADP1613, VOUT = 12V
ADP1613, VOUT = 15V
30
1 10 100 1k
LOAD CURRENT (mA)
Figure 2. ADP1612/ADP1613 Efficiency for Various Output Voltages
Rev. D
Information furnished by Analog Devices is believed to be accurate and reliable. However, no
responsibilityisassumedbyAnalogDevices for itsuse,nor foranyinfringementsofpatentsor other
rights of third parties that may result from its use. Specifications subject to change without notice. No
license is granted by implication or otherwise under any patent or patent rights of Analog Devices.
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One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700
www.analog.com
Fax: 781.461.3113 ©2009–2012 Analog Devices, Inc. All rights reserved.




 ADP1612
ADP1612/ADP1613
TABLE OF CONTENTS
Features .............................................................................................. 1
Applications....................................................................................... 1
Typical Application Circuit ............................................................. 1
General Description ......................................................................... 1
Revision History ............................................................................... 2
Specifications..................................................................................... 3
Absolute Maximum Ratings............................................................ 4
Thermal Resistance ...................................................................... 4
Boundary Condition .................................................................... 4
ESD Caution.................................................................................. 4
Pin Configuration and Function Descriptions............................. 5
Typical Performance Characteristics ............................................. 6
Theory of Operation ...................................................................... 11
Current-Mode PWM Operation .............................................. 11
Frequency Selection ................................................................... 11
Soft Start ...................................................................................... 11
Thermal Shutdown (TSD)......................................................... 12
UnderVoltage Lockout (UVLO)............................................... 12
REVISION HISTORY
11/12—Rev. C to Rev. D
Changes to Choosing the Input and Output Capacitors Section
and Loop Compensation Section ..................................................14
7/12—Rev. B to Rev. C
Changes to Features Section.............................................................1
Added ADIsimPower Design Tool Section..................................13
Changes to Ordering Guide ...........................................................25
4/11—Rev. A to Rev. B
Changes to Features Section............................................................ 1
Changes to Reference Feedback Voltage Parameter .................... 3
Changes to Ordering Guide .......................................................... 25
Data Sheet
Enable/Shutdown Control ........................................................ 12
Applications Information .............................................................. 13
ADIsimPower Design Tool ....................................................... 13
Setting the Output Voltage........................................................ 13
Inductor Selection ...................................................................... 13
Choosing the Input and Output Capacitors ........................... 14
Diode Selection........................................................................... 14
Loop Compensation .................................................................. 14
Soft Start Capacitor .................................................................... 15
Typical Application Circuits ......................................................... 16
Step-Up Regulator...................................................................... 16
Step-Up Regulator Circuit Examples....................................... 16
SEPIC Converter ........................................................................ 22
TFT LCD Bias Supply ................................................................ 22
PCB Layout Guidelines.................................................................. 24
Outline Dimensions ....................................................................... 25
Ordering Guide .......................................................................... 25
9/09—Rev. 0 to Rev. A
Changes to Figure 45...................................................................... 17
Changes to Figure 48 and Figure 51 ............................................ 18
Changes to Figure 54 and Figure 57 ............................................ 19
Changes to Figure 60 and Figure 63 ............................................ 20
Changes to Figure 66 and Figure 69 ............................................ 21
Changes to Figure 72...................................................................... 22
Changes to Ordering Guide .......................................................... 25
4/09—Revision 0: Initial Version
Rev. D | Page 2 of 28




 ADP1612
Data Sheet
ADP1612/ADP1613
SPECIFICATIONS
VIN = 3.6 V, unless otherwise noted. Minimum and maximum values are guaranteed for TJ = −40°C to +125°C. Typical values specified
are at TJ = 25°C. All limits at temperature extremes are guaranteed by correlation and characterization using standard statistical quality
control (SQC), unless otherwise noted.
Table 1.
Parameter
SUPPLY
Input Voltage
Quiescent Current
Nonswitching State
Shutdown
Switching State1
Enable Pin Bias Current
OUTPUT
Output Voltage
Load Regulation
REFERENCE
Feedback Voltage
Line Regulation
ERROR AMPLIFIER
Transconductance
Voltage Gain
FB Pin Bias Current
SWITCH
SW On Resistance
SW Leakage Current
Peak Current Limit2
OSCILLATOR
Oscillator Frequency
Maximum Duty Cycle
FREQ Pin Current
EN/FREQ LOGIC THRESHOLD
Input Voltage Low
Input Voltage High
SOFT START
SS Charging Current
SS Voltage
UNDERVOLTAGE LOCKOUT (UVLO)
Undervoltage Lockout Threshold
THERMAL SHUTDOWN
Thermal Shutdown Threshold
Thermal Shutdown Hysteresis
Symbol
VIN
IQ
IQSHDN
IQSW
IEN
VOUT
VFB
GMEA
AV
RDSON
ICL
fSW
DMAX
IFREQ
VIL
VIH
ISS
VSS
Conditions
ADP1612
ADP1613
VFB = 1.5 V, FREQ = VIN
VFB = 1.5 V, FREQ = GND
VEN = 0 V
FREQ = VIN, no load
FREQ = GND, no load
VEN = 3.6 V
ILOAD = 10 mA to 150 mA, VIN = 3.3 V, VOUT = 12 V
ADP1612, VIN = 1.8 V to 5.5 V; ADP1613, VIN = 2.5 V to 5.5 V
ΔI = 4 µA
VFB = 1.3 V
ISW = 1.0 A
VSW = 20 V
ADP1612, duty cycle = 70%
ADP1613, duty cycle = 70%
FREQ = GND
FREQ = VIN
COMP = open, VFB = 1 V, FREQ = VIN
FREQ = 3.6 V
ADP1612, VIN = 1.8 V to 5.5 V; ADP1613, VIN = 2.5 V to 5.5 V
VSS = 0 V
VFB = 1.3 V
ADP1612, VIN rising
ADP1612, VIN falling
ADP1613, VIN rising
ADP1613, VIN falling
Min
1.8
2.5
VIN
1.215
0.9
1.3
500
1.1
88
1.6
3.4
Typ Max
5.5
5.5
900 1350
700 1300
0.01 2
4 5.8
2.2 4
3.3 7
20
0.1
1.235 1.255
0.07 0.24
80
60
1 50
130 300
0.01 10
1.4 1.9
2.0 2.5
650 720
1.3 1.4
90
58
0.3
5 6.2
1.2
1.70
1.62
2.25
2.16
150
20
Unit
V
V
µA
µA
µA
mA
mA
µA
V
mV/mA
V
%/V
µA/V
dB
nA
mΩ
µA
A
A
kHz
MHz
%
μA
V
V
µA
V
V
V
V
V
°C
°C
1 This parameter specifies the average current while switching internally and with SW (Pin 5) floating.
2 Current limit is a function of duty cycle. See the Typical Performance Characteristics section for typical values over operating ranges.
Rev. D | Page 3 of 28






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