ADP2102YCPZ-1.8-R7 Analog Devices Inc, ADP2102YCPZ-1.8-R7 Datasheet

CONV DC-DC 600MA STEPDOWN 8LFCSP

ADP2102YCPZ-1.8-R7

Manufacturer Part Number
ADP2102YCPZ-1.8-R7
Description
CONV DC-DC 600MA STEPDOWN 8LFCSP
Manufacturer
Analog Devices Inc
Type
Step-Down (Buck)r
Datasheet

Specifications of ADP2102YCPZ-1.8-R7

Package / Case
8-LFCSP
Mounting Type
Surface Mount
Current - Output
600mA
Voltage - Output
1.8V
Voltage - Input
2.7 ~ 5.5 V
Power - Output
740mW
Operating Temperature
-40°C ~ 85°C
Number Of Outputs
1
Internal Switch(s)
Yes
Frequency - Switching
3MHz
Synchronous Rectifier
Yes
Primary Input Voltage
3.6V
No. Of Outputs
1
Output Voltage
1.8V
Output Current
600mA
No. Of Pins
8
Operating Temperature Range
-40°C To +85°C
Msl
MSL 1 - Unlimited
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
FEATURES
Input voltage range: 2.7 V to 5.5 V
600 mA maximum load current
95% efficiency
Low duty cycle operation
Only 3 tiny external ceramic components
3 MHz typical operating frequency
Fixed output voltage from 0.8 V to 1.875 V
Adjustable output voltage up to 3.3 V
0.01 μA shutdown supply current
Automatic power save mode
Internal synchronous rectifier
Internal soft start
Internal compensation
Enable/shutdown logic input
Undervoltage lockout
Current limit protection
Thermal shutdown
Small 8-lead, 3 mm × 3 mm LFCSP package
APPLICATIONS
USB powered devices
WLAN and gateways
Point of loads
Processor core power from 5 V
Digital cameras
PDAs and palmtop computers
Portable media players, GPS
Rev. B
Information furnished by Analog Devices is believed to be accurate and reliable. However, no
responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or 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.
Trademarks and registered trademarks are the property of their respective owners.
TYPICAL PERFORMANCE CHARACTERISTICS
100
95
90
85
80
75
70
65
60
10
V
IN
= 3.6V
LOAD CURRENT (mA)
Figure 1.
V
V
100
IN
IN
= 2.7V
V
= 3V
IN
= 4.2V
V
T
A
OUT
Low Duty Cycle, 600 mA, 3 MHz Synchronous
= 25°C
= 1.375V
1000
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700
Fax: 781.461.3113
Step-Down DC-to-DC Converter
GENERAL DESCRIPTION
The ADP2102 is a synchronous step-down dc-to-dc converter
that converts a 2.7 V to 5.5 V unregulated input voltage to a lower
regulated output voltage with up to 95% efficiency and 1%
accuracy. The low duty cycle capability of the ADP2102 is ideal for
USB applications or 5 V systems that power up submicron subvolt
processor cores. Its 3 MHz typical operating frequency and excel-
lent transient response allow the use of small, low cost 1 μH
inductors and 2.2 μF ceramic capacitors. At medium-to-high
load currents, it uses a current mode, pseudofixed frequency pulse-
width modulation to extend battery life. To ensure the longest
battery life in portable applications, the ADP2102 has a power save
mode (PSM) that reduces the switching frequency under light
load conditions to significantly reduce quiescent current.
The ADP2102 is available in both fixed and adjustable output
voltage options with 600 mA maximum output current. The preset
output voltage options voltage are 1.875 V, 1.8 V, 1.5 V, 1.375 V,
1.25 V, 1.2 V, 1.0 V, and 0.8 V. The adjustable voltage option is
available from 0.8 V to 3.3 V. The ADP2102 requires only three
external components and consumes 0.01 μA in shutdown mode.
The ADP2102 is available in an 8-lead LFCSP package and is
specified for the −40 °C to +85 °C temperature range.
INPUT VOLTAGE
2.7V TO 5.5V
DCM/
CCM
FORCED
2.2µF
TYPICAL APPLICATIONS CIRCUIT
C
CCM
IN
V
MODE
IN
OFF
©2007 Analog Devices, Inc. All rights reserved.
ADP2102
EN
ON
Figure 2.
GND
FB/OUT
LX
1µH
L
ADP2102
OUTPUT VOLTAGE
0.8V TO 1.875V
www.analog.com
C
2.2µF
OUT

Related parts for ADP2102YCPZ-1.8-R7

ADP2102YCPZ-1.8-R7 Summary of contents

Page 1

FEATURES Input voltage range: 2 5.5 V 600 mA maximum load current 95% efficiency Low duty cycle operation Only 3 tiny external ceramic components 3 MHz typical operating frequency Fixed output voltage from 0 1.875 V ...

Page 2

ADP2102 TABLE OF CONTENTS Features .............................................................................................. 1 Applications....................................................................................... 1 General Description ......................................................................... 1 Typical Performance Characteristics ............................................. 1 Typical Applications Circuit............................................................ 1 Revision History ............................................................................... 2 Specifications..................................................................................... 3 Absolute Maximum Ratings............................................................ 4 Thermal Resistance ...................................................................... 4 Boundary Condition.................................................................... 4 ESD ...

Page 3

SPECIFICATIONS MODE = Table 1. Parameter Conditions INPUT CHARACTERISTICS 2 Input Voltage Range Undervoltage Lockout Threshold V Undervoltage Lockout Hysteresis OUTPUT CHARACTERISTICS Output Voltage Range ...

Page 4

ADP2102 ABSOLUTE MAXIMUM RATINGS Table 2. Parameter AVIN, EN, MODE, FB/OUT to AGND LX to PGND PVIN to PGND PGND to AGND AVIN to PVIN Operating Ambient Temperature Range Junction Temperature Range Storage Temperature Range Soldering Conditions 1 The ADP2102 ...

Page 5

PIN CONFIGURATION AND FUNCTION DESCRIPTIONS Table 4. Pin Function Descriptions Pin No. Mnemonic Description 1 MODE Mode Input. To set the ADP2102 to forced continuous conduction mode (CCM), drive MODE high. To set the ADP2102 to power save mode/auto mode ...

Page 6

ADP2102 TYPICAL PERFORMANCE CHARACTERISTICS 2.2 μ 2.2 μ OUT 100 2. 3. LOAD ...

Page 7

100 LOAD CURRENT (mA) Figure 10. Efficiency vs. Load Current (V OUT 95 PSM CCM 65 ...

Page 8

ADP2102 1.52 1.51 1. 0mA LOAD I = 300mA 1.49 LOAD I = 600mA LOAD 1.48 1.47 1.46 –40 – TEMPERATURE (°C) Figure 16. Output Voltage vs. Temperature (V 1. 0mA LOAD I = ...

Page 9

LOAD CURRENT (mA) Figure 22. Switching Frequency vs. Load Current 1.08 1.07 1.06 1.05 1.04 1.03 1.02 1.01 1.00 2.7 3.0 ...

Page 10

ADP2102 T CH4 CH1 CH2: V OUT 2 CH1 500mA Ω CH2 2.00V M 10.0µ CH4 2.00V 51.00% Figure 28. PSM Mode Operation at Light Loads (75 mA) T ...

Page 11

T CH1: V (AC) OUT 1 CH2: I (0mA TO 300mA) LOAD 2 CH1 50.0mV CH2 200mA Ω M 100µs A CH2 –300.000µs Figure 34. Load Transient Response (V OUT T CH1: V (AC) OUT 1 CH3: ...

Page 12

ADP2102 T CH1 CH2: V OUT 2 CH3 CH1 2.00V CH2 500mV M 2.00ms A CH2 CH3 200mA Ω 6.600% Figure 40. Heavy Load Start-Up Waveform T CH4: V ...

Page 13

THEORY OF OPERATION The ADP2102 is a high frequency, synchronous step-down, dc-to-dc converter optimized for battery-powered, portable applications based on constant on-time current-mode control architecture with voltage feed forward to null frequency variation with line voltage, creating a ...

Page 14

ADP2102 As a result of this auto mode control technique, losses are minimized at light loads, improving system efficiency. The PSM reverse current comparator controls the entry and exit into forced continuous conduction mode. Some minor jitter is normal during ...

Page 15

SOFT START The ADP2102 has an internal soft start function that ramps the output voltage in a controlled manner upon startup, therefore limiting the inrush current. This prevents possible input voltage drops when a battery or a high impedance power ...

Page 16

ADP2102 APPLICATIONS INFORMATION The external component selection for the ADP2102 applications circuit, as shown in Figure 2, is driven by the load requirement and begins with the selection of Inductor L. Once the inductor is chosen, C and C can ...

Page 17

Table 5. Recommended Inductor Selection Manufacturer Series FDK Corporation MIPF2520D TDK MLP2520S2R2L Murata LQM2HPN2R2MJ0 Coilcraft, Inc. LPS3015-222ML Taiyo Yuden NR3010T2R2M Table 6. Recommended Input and Output Capacitor Selection Capacitor Murata 2.2 μF 6.3 V GRM188R60J225K X5R 0603 4.7 μF 6.3 ...

Page 18

ADP2102 ADP2102-ADJ 1 MODE FB/OUT 4 AGND C R2 ADP2102-ADJ 8 MODE AVIN 7 EN PVIN L1 6 FB/OUT LX 2.2µH 5 AGND PGND C C OUT IN 4.7µF 2.2µ ...

Page 19

SETTING THE OUTPUT VOLTAGE The output voltage of the ADP2102-ADJ is externally set by a resistive voltage divider from the output voltage to FB. The ratio of the resistive voltage divider sets the output voltage, and the absolute value of ...

Page 20

ADP2102 Inductor Losses Inductor conduction losses are caused by the flow of current through the inductor, which has an internal resistance (DCR) associated with it. Larger sized inductors have smaller DCR, which may decrease inductor conduction losses. Inductor core losses ...

Page 21

Output Capacitor For transient applications, assume a droop of 0.1 V. Typically, it takes two to three cycles for the output to settle from a load transient because the capacitor alone supplies the load current until the loop responds. Under ...

Page 22

ADP2102 CIRCUIT BOARD LAYOUT RECOMMENDATIONS Good circuit board layout is essential in obtaining the best performance from the ADP2102. Poor circuit layout degrades the output ripple and regulation, as well as the EMI and electromagnetic compatibility performance. Figure 52 and ...

Page 23

VIN MODE CBP EN FB/OUT ADP2102 AGND Figure 52. Recommended Layout of the Top Layer of the ADP2102-FXD Application Board VIN MODE EN AGND FB/OUT Figure 53. Recommended Layout of the Bottom Layer of the ADP2102-FXD Application Board Rev. B ...

Page 24

... MAX 0.85 NOM SEATING PLANE ORDERING GUIDE Output Model Current (mA) 1 ADP2102YCPZ-0.8-R7 600 1 ADP2102YCPZ-1.0-R7 600 1 ADP2102YCPZ-1.2-R7 600 1 ADP2102YCPZ-1.25R7 600 1 ADP2102YCPZ-1.37R7 600 ADP2102YCPZ-1.5-R7 1 600 1 ADP2102YCPZ-1.8-R7 600 ADP2102YCPZ-1.87R7 1 600 1 ADP2102YCPZ-1-R7 600 1 ADP2102YCPZ-2-R7 600 1 ADP2102YCPZ-3-R7 600 1 ADP2102YCPZ-4-R7 600 1 ADP2102-0.8-EVALZ 1 ADP2102-1.0-EVALZ 1 ADP2102-1.2-EVALZ 1 ADP2102-1.25-EVALZ 1 ADP2102-1.375-EVALZ 1 ADP2102-1 ...

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