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ADP1610ARMZ-R7
1.2 MHz DC-DC Step-Up Switching Converter
1.2 MHz DC-DC Step-Up Switching ConverterRev. 0
FEATURES
Fully integrated 1.2 A , 0.2 Ω, power switch
Pin-selectable 700 kHz or 1.2 MHz PWM frequency
92% efficiency
Adjustable output voltage up to 12 V
3% output regulation accuracy
Adjustable soft start
Input undervoltage lockout
MSOP 8-lead package
APPLICATIONS
TFT LC bias supplies
Portable applications
Industrial/instrumentation equipment
GENERAL DESCRIPTION The ADP1610 is a dc-to-dc step-up switching converter with an
integrated 1.2 A, 0.2 Ω power switch capable of providing an
output voltage as high as 12 V. With a package height of less that
1.1 mm, the ADP1610 is optimal for space-constrained
applications such as portable devices or thin film transistor
(TFT) liquid crystal displays (LCDs).
The ADP1610 operates in pulse-width modulation (PWM)
current mode with up to 92% efficiency. Adjustable soft start
prevents inrush currents at startup. The pin-selectable switching
frequency and PWM current-mode architecture allow excellent
transient response, easy noise filtering, and the use of small,
cost-saving external inductors and capacitors.
The ADP1610 is offered in the Pb-free 8-lead MSOP and
operates over the temperature range of −40°C to +85°C.
FUNCTIONAL BLOCK DIAGRAM
COMP
GND001
SSFigure 1.
TABLE OF CONTENTS Specifications.....................................................................................3
Absolute Maximum Ratings............................................................4
ESD Caution..................................................................................4
Pin Configuration and Function Descriptions.............................5
Typical Performance Characteristics.............................................6
Theory of Operation......................................................................10
Current-Mode PWM Operation..............................................10
Frequency Selection...................................................................10
Soft Start......................................................................................10
On/Off Control...........................................................................10
Setting the Output Voltage........................................................10
Choosing the Input and Output Capacitors...........................11
Diode Selection...........................................................................12
Loop Compensation..................................................................12
Soft Start Capacitor....................................................................13
Application Circuits...................................................................13
DC-DC Step-Up Switching Converter with True Shutdown14
TFT LCD Bias Supply................................................................14
Sepic Power Supply....................................................................14
Layout Procedure...........................................................................15
Outline Dimensions.......................................................................16
Ordering Guide..........................................................................16
REVISION HISTORY
10/04—Revision 0: Initial Version SPECIFICATIONS VIN = 3.3 V, TA = −40°C to +85°C, unless otherwise noted.
All limits at temperature extremes are guaranteed by correlation and characterization using standard statistical quality control (SQC),
unless otherwise noted.
Table 1. 1 This parameter specifies the average current while switching internally and with SW (Pin 5) floating. Guaranteed by design and not fully production tested.
3 Guaranteed by characterization.
ABSOLUTE MAXIMUM RATINGS
Table 2. Stresses above those listed under Absolute Maximum Ratings
may cause permanent damage to the device. This is a stress
rating only and functional operation of the device at these or
any other conditions above those indicated in the operational
section of this specification is not implied. Exposure to absolute
maximum rating conditions for extended periods may affect
device reliability. Absolute maximum ratings apply individually
only, not in combination. Unless otherwise specified, all other
voltages are referenced to GND.
VOUT
VOUT
CSS
CIN
VIN
1.2MHz
700kHzFigure 2. Block Diagram and Typical Application Circuit
ESD CAUTION ESD (electrostatic discharge) sensitive device. Electrostatic charges as high as 4000 V readily accumulate on
the human body and test equipment and can discharge without detection. Although this product features
proprietary ESD protection circuitry, permanent damage may occur on devices subjected to high energy
electrostatic discharges. Therefore, proper ESD precautions are recommended to avoid performance
degradation or loss of functionality.
PIN CONFIGURATION AND FUNCTION DESCRIPTIONS COMP123
GND48765
ADP1610
TOP VIEW
(Not to Scale)
Figure 3. Pin Configuration
Table 3. Pin Function Descriptions
