ADP3050AR-5 Analog Devices Inc, ADP3050AR-5 Datasheet
ADP3050AR-5
Specifications of ADP3050AR-5
Available stocks
Related parts for ADP3050AR-5
ADP3050AR-5 Summary of contents
Page 1
FEATURES Wide input voltage range: 3 Adjustable and fixed (3 output options Integrated 1 A power switch Uses small surface-mount components Cycle-by-cycle current limiting Peak input voltage (100 ms Configurable as ...
Page 2
ADP3050 TABLE OF CONTENTS Features .............................................................................................. 1 Applications ....................................................................................... 1 Functional Block Diagram .............................................................. 1 General Description ......................................................................... 1 Revision History ............................................................................... 2 Specifications ..................................................................................... 3 Absolute Maximum Ratings ............................................................ 4 ESD Caution .................................................................................. 4 Pin Configuration and Function Descriptions ...
Page 3
... Minimum input voltage is not measured directly, but is guaranteed by other tests. The actual minimum input voltage needed to keep the output in regulation depends on output voltage and load current. Symbol Conditions V Over line and temperature load 100 ADP3050AR only LOAD ADP3050AR-3.3, ADP3050AR-5 I ADP3050AR only VOL COMP = 1 1 1.3 V COMP = 1 3 3.6 V COMP = OSC ...
Page 4
ADP3050 ABSOLUTE MAXIMUM RATINGS Table 2. Parameter IN Voltage Continuous Peak (<100 ms) BOOST Voltage Continuous Peak (<100 ms) SD, BIAS Voltage FB Voltage COMP Voltage SWITCH Voltage Operating Ambient Temperature Range Operating Junction Temperature Range Storage Temperature Range 1 ...
Page 5
PIN CONFIGURATION AND FUNCTION DESCRIPTIONS Table 3. Pin Function Descriptions Pin No. Mnemonic Description 1 SWITCH Switch Node. This pin is the emitter of the internal NPN power switch. The voltage at this pin switches between V and approximately −0.5 ...
Page 6
ADP3050 TYPICAL PERFORMANCE CHARACTERISTICS 5 10V, NO LOAD IN 4.5 4.0 INTO BIAS PIN 3.5 3.0 2.5 2.0 1.5 1.0 INTO IN PIN 0.5 0 –45 –35 –25 –15 – TEMPERATURE (°C) Figure 3. ...
Page 7
12V V = 24V 30V 18V 33µ 22µ 100µF ...
Page 8
ADP3050 0 10V IN 0.7 0.6 0.5 0.4 0.3 0.2 0.1 0 0.1 0.2 0.3 0.4 0.5 0.6 LOAD CURRENT (A) Figure 15. Switch Saturation Voltage vs. Load Current 210 V = 10V IN 208 I = 250µA ...
Page 9
V = 10V OUT R = 19Ω V LOAD OUT L = 33µH COILTRONICS UP2B-330 C = 22µ 100µF OUT I = 500mA/DIV TIME (100µs/DIV) Figure 21. Start-Up from Shutdown ...
Page 10
... 22µF Figure 24. Typical Application Circuit SETTING THE OUTPUT VOLTAGE The output of the adjustable version (ADP3050AR and ADP3050ARZ) can be set to any voltage between 1.25 V and connecting a resistor divider to the FB pin as shown in Figure 25. ⎛ × ⎜ ⎜ − OUT ⎝ ...
Page 11
APPLICATIONS INFORMATION The complete process for designing a step-down switching regulator using the ADP3050 is provided in the following sections. Each section includes a list of recommended devices. These lists do not include every available device or manufacturer. They contain ...
Page 12
ADP3050 Inductor Core Types and Materials Many types of inductors are currently available. Numerous core styles along with numerous core materials often make the selection process seem even more confusing. A quick overview of the types of inductors available makes ...
Page 13
Multilayer ceramic capacitors can be used in applications where minimum output voltage ripple is a priority. They have a very low ESR (a 22 μF ceramic can have an ESR one-fifth that μF solid tantalum), but may ...
Page 14
ADP3050 Table 4. Manufacturers Inductor Manufacturers Sumida Coilcraft Cooper Bussmann Coiltronics NEC Tokin Würth Elektronik Toko CATCH DIODE SELECTION The recommended catch diode is a Type 1N5818 Schottky or equivalent. The low forward voltage drop (450 mV typical at 1 ...
Page 15
Ceramics are an excellent choice for input bypassing, due to their low ESR and high ripple current rating. Ceramics are especially suited for high input voltages and are available from many different manufacturers. Tantalums are often used for input bypassing, ...
Page 16
ADP3050 For output voltages greater than may be necessary to add a small capacitor in parallel with R2, as shown in Figure 25. This improves stability and transient response. For tantalum output capacitors, the typical value for ...
Page 17
For example 3.3 V system with I ⎛ ⎞ × × + ⎜ ⎟ ⎝ ⎠ − × × ...
Page 18
ADP3050 BOARD LAYOUT GUIDELINES A good board layout is essential when designing a switching regulator. The high switching currents along with parasitic wiring inductances can generate significant voltage transients and cause havoc in sensitive circuits. For best results, keep the ...
Page 19
INVERTING (BUCK BOOST) REGULATOR The circuit in Figure 29 shows the ADP3050 in a buck-boost configuration that produces a negative output voltage from a positive input voltage. This topology looks quite similar to the buck shown in Figure 28 (except ...
Page 20
ADP3050 Dual Output SEPIC Regulator For many systems, a dual polarity supply is needed. The circuit in Figure 30 generates both a positive and a negative 5 V output using a single magnetic component. The two inductors shown are actually ...
Page 21
... OUTLINE DIMENSIONS 0.25 (0.0098) 0.10 (0.0040) COPLANARITY ORDERING GUIDE Model Output Voltage ADP3050AR ADJ ADP3050AR-REEL ADJ ADP3050AR-REEL7 ADJ ADP3050AR-3.3 3.3 V ADP3050AR-3.3-REEL 3.3 V ADP3050AR-3.3-RL7 3.3 V ADP3050AR ADP3050AR-5-REEL 5 V ADP3050AR-5-REEL7 ADP3050ARZ ADJ ADP3050ARZ-RL 2 ADJ 2 ADP3050ARZ-R7 ADJ 2 ADP3050ARZ-3.3 3 ADP3050ARZ-3.3-RL 3 ADP3050ARZ-3.3-RL7 3 ADP3050ARZ ADP3050ARZ-5-REEL ADP3050ARZ-5-REEL7 Operating junction temperature is −40 to +125°C. ...
Page 22
ADP3050 NOTES Rev Page ...
Page 23
NOTES Rev Page ADP3050 ...
Page 24
ADP3050 NOTES ©2008 Analog Devices, Inc. All rights reserved. Trademarks and registered trademarks are the property of their respective owners. D00125-0-5/08(B) Rev Page ...