ADP2303ARDZ-5.0-R7 Analog Devices Inc, ADP2303ARDZ-5.0-R7 Datasheet

ADP2303ARDZ-5.0-R7

Manufacturer Part Number

ADP2303ARDZ-5.0-R7

Description

IC REG SW STPDWN NONSYNCH 8SOIC

Manufacturer

Analog Devices Inc

Type

Step-Down (Buck), PFM/PWM - Current Moder

Datasheet

1.ADP2302ARDZ-2.5-R7.pdf (28 pages)

Specifications of ADP2303ARDZ-5.0-R7

Internal Switch(s)

Yes

Synchronous Rectifier

Number Of Outputs

Voltage - Output

Current - Output

Frequency - Switching

700kHz

Voltage - Input

3 V ~ 20 V

Operating Temperature

-40°C ~ 125°C

Mounting Type

Surface Mount

Package / Case

8-SOIC (0.154", 3.90mm Width) Exposed Pad

Primary Input Voltage

12V

No. Of Outputs

Output Voltage

Output Current

No. Of Pins

Operating Temperature Range

-40Â°C To +125Â°C

Msl

MSL 3 - 168 Hours

Peak Reflow Compatible (260 C)

Yes

Dropout Voltage Vdo

85mV

Rohs Compliant

Yes

Lead Free Status / RoHS Status

Lead free / RoHS Compliant

Other names

ADP2303ARDZ-5.0-R7
ADP2303ARDZ-5.0-R7TR

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Quantity

Price

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Bonase Electronics (HK) Co., Limited

Part Number:

ADP2303ARDZ-5.0-R7

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FEATURES

Wide input voltage range: 3.0 V to 20 V

Maximum load current

±1.5% output accuracy over temperature

Output voltage down to 0.8 V

700 kHz switching frequency

Current-mode control architecture

Automatic PFM/PWM mode

Precision enable pin with hysteresis

Integrated high-side MOSFET

Integrated bootstrap diode

Internal compensation and soft start

Power-good output

Undervoltage lockout (UVLO)

Overcurrent protection (OCP)

Thermal shutdown (TSD)

8-lead SOIC package with exposed paddle

APPLICATIONS

Intermediate power rail conversion

DC-to-DC point of load applications

Communications and networking

Industrial and instrumentation

Healthcare and medical

Consumer

GENERAL DESCRIPTION

The ADP2302/ADP2303 are fixed frequency, current-mode

control, step-down, dc-to-dc regulators with an integrated

power MOSFET. The ADP2302/ADP2303 can run from an

input voltage of 3.0 V to 20 V, which makes them suitable for a

wide range of applications. The output voltage of the ADP2302/

ADP2303 can be down to 0.8 V for the adjustable version, while

the fixed output version is available in preset output voltage

options of 5.0 V, 3.3 V, and 2.5 V. The 700 kHz operating

frequency allows small inductor and ceramic capacitors to be

used, providing a compact solution. Current mode control

provides fast and stable line and load transient performance.

Rev. 0

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.

2 A for ADP2302

3 A for ADP2303

Nonsynchronous Step-Down Regulators

One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.

Tel: 781.329.4700

Fax: 781.461.3113

The ADP2302/ADP2303 have integrated soft start circuitry to

prevent a large inrush current at power-up. The power-good

signal can be used to sequence devices that have an enable input.

The precision enable threshold voltage allows the part to be

easily sequenced from other input/output supplies. Other key

features include undervoltage lockout (UVLO), overvoltage

protection (OVP), thermal shutdown (TSD), and overcurrent

protection (OCP).

The ADP2302/ADP2303 devices are available in the 8-lead,

SOIC package with exposed paddle and are rated for the −40

to +125

OFF

100

Figure 2. ADP2303 Efficiency vs. Output Current at V

C junction temperature range.

INDUCTOR: VLF10040T

DIODE: SSB43L

TYPICAL APPLICATIONS CIRCUIT

0.5

2 A/3 A, 20 V, 700 kHz,

Figure 1. Typical Application Circuit

VIN

PGOOD

ADP2302/

ADP2303

GND

ADP2302/ADP2303

1.0

OUTPUT CURRENT (A)

BST

4R7N5R4

1.5

2.0

www.analog.com

OUT

2.5

= 3.3V

= 5.0V

= 12 V

3.0

OUT

Related parts for ADP2303ARDZ-5.0-R7

ADP2303ARDZ-5.0-R7 Summary of contents

Page 1

FEATURES Wide input voltage range: 3 Maximum load current 2 A for ADP2302 3 A for ADP2303 ±1.5% output accuracy over temperature Output voltage down to 0.8 V 700 kHz switching frequency Current-mode control architecture Automatic ...

Page 2

ADP2302/ADP2303 TABLE OF CONTENTS Features .............................................................................................. 1 Applications....................................................................................... 1 Typical Applications Circuit............................................................ 1 General Description ......................................................................... 1 Revision History ............................................................................... 2 Specifications..................................................................................... 3 Absolute Maximum Ratings............................................................ 4 Thermal Resistance ...................................................................... 4 ESD Caution.................................................................................. 4 Pin Configuration and Function Descriptions............................. 5 ...

Page 3

SPECIFICATIONS −40°C to +125°C for minimum/maximum specifications, and Table 1. Parameters VIN Voltage Range Supply Current Shutdown Current Undervoltage Lockout Threshold FB Regulation Voltage Bias Current Resistance Peak ...

Page 4

ADP2302/ADP2303 ABSOLUTE MAXIMUM RATINGS Table 2. Parameter VIN, EN, PGOOD SW BST to SW FB, NC Operating Junction Temperature Range Storage Temperature Range Soldering Conditions Stresses above those listed under Absolute Maximum Ratings may cause permanent damage to the device. ...

Page 5

PIN CONFIGURATION AND FUNCTION DESCRIPTIONS Table 4. Pin Function Descriptions Pin No. Mnemonic Description 1 BST Bootstrap Supply for the High-Side MOSFET Driver. A 0.1 μF capacitor is connected between SW and BST to provide a floating driver voltage for ...

Page 6

ADP2302/ADP2303 TYPICAL PERFORMANCE CHARACTERISTICS 25°C, unless otherwise noted 100 INDUCTOR: VLF10040T-6R8N4R5 DIODE: SSB43L 40 0 0.5 1.0 1.5 OUTPUT CURRENT (A) Figure 4. ADP2303 Efficiency, V 100 ...

Page 7

V (V) IN Figure 10. ADP2302 Line Regulation 3 OUT 0.20 0.15 0.10 0.05 0 –0.05 –0.10 –0.15 –0. ...

Page 8

ADP2302/ADP2303 810 790 770 750 730 710 690 670 650 630 610 590 –40 – TEMPERATURE (°C) Figure 16. Frequency vs. Temperature 4.4 4.2 4.0 3.8 3.6 3.4 3.2 3.0 2.8 2.6 –40 – ...

Page 9

TEMPERATURE (°C) Figure 22. Minimum Off Time vs. Temperature 180 170 160 150 140 130 120 110 100 90 80 ...

Page 10

ADP2302/ADP2303 V OUT CH1 2.00V CH2 10.0V M1.00ms W CH4 2.00A Ω 20.20% CH3 10.0V W Figure 28. Soft Start Without Load, V OUT V (AC) OUT 1 I ...

Page 11

V OUT CH1 1.00mV CH2 10.0V M40.0µs W CH4 5.00A Ω T 30.00% Figure 34. Output Short 3 OUT L = 4.7 μ × 47 μF ...

Page 12

ADP2302/ADP2303 –16 –32 –48 CROSS FREQUENCY = 32kHz –64 PHASE MARGIN = 59° –80 1k 10k 100k FREQUENCY (Hz) Figure 40. ADP2302 Bode Plot, V OUT L = 6.8 μ × ...

Page 13

FUNCTIONAL BLOCK DIAGRAM THERMAL SHUTDOWN SHUTDOWN LOGIC 1.20V OFF 1.2µA OVP 0.880V PGOOD 4 0.680V VIN 2 UVLO SHUTDOWN IC CURRENT OCP SENSE AMPLIFIER BOOT CURRENT REGULATOR LIMIT THRESHOLD R S ...

Page 14

ADP2302/ADP2303 THEORY OF OPERATION The ADP2302/ADP2303 are nonsynchronous, step-down, dc-to-dc regulators, each with an integrated high-side power MOSFET. The high switching frequency and 8-lead SOIC package provide a small, step-down, dc-to-dc regulator solution. The ADP2302/ADP2303 can operate with an input ...

Page 15

Table 5. Correlation Between f and Pin Voltage Switching Frequency V ≥ 0 0.4 V < V < 0 0.2 V < V ≤ 0.4 V 1/4 f ...

Page 16

ADP2302/ADP2303 APPLICATIONS INFORMATION PROGRAMMING OUTPUT VOLTAGE ADP2302/ADP2303 have an adjustable version where the output voltage is programmed through an external resistive divider, as shown in Figure 45. Suggested resistor values for the typical output voltage setting are listed in Table ...

Page 17

MAXIMUM INPUT VOLTAGE MINIMUM INPUT VOLTAGE (V) OUT Figure 47. Voltage Conversion Limitations LOW INPUT VOLTAGE CONSIDERATIONS For low input voltage between ...

Page 18

ADP2302/ADP2303 response and efficiency. Therefore, the inductor value is calculated using the following equation − ⎛ ⎜ = × IN OUT OUT L ⎜ × × ⎝ ...

Page 19

INPUT CAPACITOR The input capacitor must be able to support the maximum input operating voltage and the maximum RMS input current. The rms ripple current flowing through the input capacitor is, at maximum, I /2. Select an input capacitor capable ...

Page 20

ADP2302/ADP2303 DESIGN EXAMPLE This section provides the procedures to select the external compo- nents, based on the example specifications listed in Table 10. The schematic for this design example is shown in Figure 51. Because the output current is 3 ...

Page 21

V = 12V 10µF 25V R EN1 56kΩ EN2 10.2kΩ 1% Table 11. Recommended External Components for Typical Applications at 2 A/3 A Output Load Part Number V (V) V (V) IN OUT ADP2302 18 ...

Page 22

ADP2302/ADP2303 CIRCUIT BOARD LAYOUT RECOMMENDATIONS Good circuit board layout is essential to obtaining the best performance for ADP2302/ADP2303. Poor layout can affect the regulation and stability, as well as the electromagnetic interface (EMI) and electromagnetic compatibility (EMC) performance. A PCB ...

Page 23

TYPICAL APPLICATION CIRCUITS V = 12V 10µF 25V R PGOOD 100kΩ 12V 10µF 25V R PGOOD 100kΩ 12V 10µF 25V 10µF R PGOOD ...

Page 24

... GND Figure 59. ADP2303 Typical Application VIN BST C ADP2303ARDZ BST 0.1µ 3.3µH D SSB43L PGOOD FB GND Figure 60. ADP2303 Typical Application VIN BST ADP2303ARDZ C BST 0.1µ 3.3µH D SSB43L PGOOD FB GND Figure 61. ADP2303 Typical Application Rev Page 5.0V OUT OUT1 OUT2 22µ ...

Page 25

... V = 12V IN VIN BST C IN ADP2303ARDZ-5.0 10µF 25V EN R PGOOD 100kΩ PGOOD GND Figure 62. ADP2303 Typical Application VIN BST C IN ADP2302ARDZ 10µF 25V PGOOD 100kΩ PGOOD FB GND Figure 63. ADP2302 Typical Application, V Rev Page BST 0.1µ OUT 4.7µH OUT1 D 47µ ...

Page 26

... Model Output Voltage ADP2302ARDZ-R7 Adjustable ADP2302ARDZ-2.5-R7 2.5 V ADP2302ARDZ-3.3-R7 3.3 V ADP2302ARDZ-5.0-R7 5.0 V ADP2302-EVALZ ADP2303ARDZ-R7 Adjustable ADP2303ARDZ-2.5-R7 2.5 V ADP2303ARDZ-3.3-R7 3.3 V ADP2303ARDZ-5.0-R7 5.0 V ADP2303-EVALZ RoHS Compliant Part. 5.00 (0.197) 4.90 (0.193) 2.29 (0.090) 4.80 (0.189) 2.29 (0.090 6.20 (0.244) TOP VIEW 6.00 (0.236 5.80 (0.228) BOTTOM VIEW 1 ...

Page 27

NOTES Rev Page ADP2302/ADP2303 ...

Page 28

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