Diodes AP3583, AP3583A User Manual

Single Phase Synchronous Buck PWM Controller With Reference Input AP3583/A

Data Sheet

General Description

The AP3583/A is a simple single-phase synchronous
buck controller. It operates from 5V or 12V supply
voltage and delivers high quality output voltage as
low as 0.6V. This device operates at fixed 200kHz
(AP3583) or 300kHz (AP3583A) frequency and
provides an optimum compromise between efficiency,
external component size and cost.

With integrated linear regulator bootstrap diode, and
N-Channel MOSFET gate drives, the AP3583/A can
reduce external component count and board space
requirements.

The AP3583/A supports both tracking mode and
stand-alone mode operation. The output voltage is
tightly regulated to the external reference voltage
from 0.4V to 3V at tracking mode or internal 0.6V
reference at stand-alone mode.

Other features include internal soft-start, under
voltage protection, over current protection and
shutdown function. With aforementioned functions,
this part provides customers a compact, high
efficiency, well-protected and cost-effective
solutions.

The AP3583/A is available in PSOP-8 package.

Figure 1. Package Type of AP3583/A

Features

• Supply Voltage: 5V/12V

• V

• 0.6V to 80% of V

• Internal Reference: 0.6V

• Support Tracking Mode and Stand-alone Mode

• Simple Single-loop Control

• Voltage-mode PWM Control

• Duty Cycle: 0% to 80%

• Fast Transient Response

• Fixed Oscillator Frequency: 200/300kHz

• Lossless, Programmable Over Current Protection

• Start-up into Pre-biased Output

• Built-in Thermal Shutdown

• Built-in Soft-start

• Over Current/Voltage Protection

• Under Voltage Protection

• Integrated Boot Diode

Input Range: 3.0V to 13.2V

IN

Output Range

IN

(Uses Lower MOSFET R

DS(ON)

)

Applications

• Power Supplies for Microprocessors/Peripherals

PCs, Embedded Controllers, Memory Supplies

•

• DSP and Core Communications Processor

Supplies

• Subsystem Power Supplies

• PCI, AGP, Graphics Cards and Digital TV

• SSTL-2 and DDR/2/3 SDRAM Bus Termination

Supply

• Cable Modems, Set Top Boxes, and DSL

• Modems

• Industrial Power Supplies and General Purpose

Supplies

• 5V/12V Input DC-DC Regulators

• Low-voltage Distributed Power Supplies

PSOP-8

Dec. 2011 Rev. 1. 1 BCD Semiconductor Manufacturing Limited

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p

Data Sheet

Single Phase Synchronous Buck PWM Controller With Reference Input AP3583/A

Pin Configuration

MP Package

(PSOP-8)

1

2

3

4

Figure 2. Pin Configuration of AP3583/A (Top View)

8

7

6

5

Pin Description

Pin Number Pin Name Function

Bootstrap pin. Connect a bootstrap capacitor (Typically from 0.1

1 BOOT

2 UGATE

3 OPS

4 LGATE

5 VCC

6 FB

7 REFIN

8 PHASE

9 GND

to 0.47µF) from this pin to PHASE pin to create a BOOT voltage
suitable to drive a standard N-Channel MOSFET

Upper-gate drive pin. Connect this pin to the upper MOSFET gate

roviding the gate drive. This pin is monitored by the adaptive
shoot-through protection circuitry to determine when the upper
MOSFET has been turned off

Over-current setting pin. Connecting a resistor (R
OPS and GND to set the over-current trigger point
Lower-gate drive pin. Connect LGATE to the lower MOSFET
gate providing the gate drive for the lower MOSFET. This pin is
monitored by the adaptive shoot-through protection circuitry to
determine when the lower MOSFET has been turned off
Bias supply pin. Provides a 5V or 12V bias supply for the chip
from this pin. The pin should be bypassed with a capacitor to
GND
Feedback pin. This pin is the inverting input of the internal error
amplifier. A resistor divider from output to GND is used to set the
output voltage
External reference input pin. This pin receives a voltage with
range from 0.4V to 3.0V as the reference voltage at the
non-inverting input of the error amplifier. Pull this pin lower than

0.3V to disable the controller, and the V
low. Let this pin open for internal 0.6V reference use
PHASE pin. This pin connects to the source of the upper
MOSFET and the drain of the lower MOSFET. This pin is also
monitored by the adaptive shoot-through protection circuitry to
determine when the upper MOSFET is turned off
Exposed pad as ground pin. Represents the signal and power
ground for the IC. Tie this pin to ground island/plane through the
lowest impedance connection available

) between

OCSET

UGATE

and V

LGATE

will go

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Data Sheet

Single Phase Synchronous Buck PWM Controller With Reference Input AP3583/A

Functional Block Diagram

VCC

5

1

BOOT

2

UGATE

8

PHASE

4

LGATE

A

40

3

OPS

4V INT

PWM

INTERNAL

REGULATOR

GATE

CONTROL

LOGIC

OCP

COMPARATOR

VCC

9

FB

REFIN

OTP

6

REFERENCE

SELECTION

7

0.3V

137.5%V

SOFT-START

OSCILLATOR

ERROR

AMPLIFIER

0.6V

ENABLE

REF

OVP

POWER-ON RESET

(POR)

PWM

COMPARATOR

GND

Figure 3. Functional Block Diagram of AP3583/A

Ordering Information

AP3583 -

Circuit Type

Blank: AP3583
A: AP3583A

Package
MP: PSOP-8

Package

Temperature

Range

Part Number Marking ID Packing Type

AP3583MP-G1 3583MP-G1 Tube

PSOP-8 -40 to 85°C

AP3583MPTR-G1 3583MP-G1 Tape & Reel

AP3583AMP-G1 3583AMP-G1 Tube

AP3583AMPTR-G1 3583AMP-G1 Tape & Reel

BCD Semiconductor's Pb-free products, as designated with "G1" suffix in the part number, are RoHS compliant
and green.

Dec. 2011 Rev. 1. 1 BCD Semiconductor Manufacturing Limited

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G1: Green

Blank: Tube
TR: Tape & Reel

Data Sheet

Single Phase Synchronous Buck PWM Controller With Reference Input AP3583/A

Absolute Maximum Ratings (Note 1)

Parameter Symbol Value Unit

Supply Voltage VCC -0.3 to 15 V

BOOT Voltage V

Voltage from UGATE to PHASE

Voltage from PHASE, LGATE Pin to GND

Voltage on Other Separate Pin

Thermal Resistance

Operating Junction Temperature

Storage Temperature

Lead Temperature (Soldering, 10 sec)

ESD (Human Body Model) (Note 2) 2000 V

ESD (Machine Model) (Note 2) 200 V

-0.3 to V

BOOT

V

UGATE

V

,

PHASE

V

LGATE

θ

JA

T

J

T

STG

T

LEAD

+15 V

PHASE

-0.3 to 15 V

-1 to 15 V

-0.3 to 6 V

50 ºC/W

-40 to 125 ºC

-65 to 150 ºC

260 ºC

Note 1: Stresses greater than those listed under “Absolute Maximum Ratings” may cause permanent damage to
the device. These are stress ratings only, and functional operation of the device at these or any other conditions
beyond those indicated under “Recommended Operating Conditions” is not implied. Exposure to “Absolute
Maximum Ratings” for extended periods may affect device reliability.
Note 2: Devices are ESD sensitive. Handling precaution recommended.

Recommended Operating Conditions

Parameter Symbol Min Max Unit

Supply Input Voltage VCC 4.5 13.2 V

Operating Junction Temperature TJ -40 125

Operating Ambient Temperature TA -40 85

°C

°C

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Data Sheet

Single Phase Synchronous Buck PWM Controller With Reference Input AP3583/A

Electrical Characteristics

VCC=12V, TA=25°C, unless otherwise specified.

Parameter Symbol Conditions Min Typ Max Unit

SUPPLY INPUT

Supply Voltage VCC 4.5 13.2 V

UGATE1and1LGATE

Supply Current ICC

Quiescent Supply Current I

CC_Q

Power Input Voltage VIN 3.0 13.2 V

POWER ON RESET

VCC Rising Threshold V

VCC Threshold Hysteresis V

POR

POR_HYS

OSCILLATOR

Oscillator Frequency f

Ramp Amplitude ∆V

OSC

OSC

PWM CONTROLLER GATE DRIVERS

Upper Gate Source Current I

Upper Gate Sink Current I

Upper Gate Sink Resistance R

Lower Gate Source Current I

Lower Gate Sink Current I

Lower Gate Sink Resistance R

PHASE Falling to LGATE
Rising Delay

LGATE Falling to UGATE
Rising Delay

UG_SRC

UG_SNK

UGATE

LG_SRC

LG_SNK

LGATE

Minimum Duty Cycle 0 %

Maximum Duty Cycle 75 80 85 %

REFERENCE VOLTAGE

Feedback Voltage VFB Stand-alone Mode 0.591 0.6 0.609 V

Pin1Open;
V

CC

V

FB=VREF

No Switching

=12V,1Switching

+0.1V,

3 mA

2 mA

VCC Rising 4.0 4.2 4.4 V

300 mV

AP3583 180 200 220

AP3583A 270 300 330

kHz

VCC=12V 1.0 V

V

BOOT-VPHASE

V

BOOT-VUGATE

V

BOOT-VPHASE

V

BOOT-VUGATE

50mA Sink Current
V

BOOT-VPHASE

VCC-V

V

LGATE

=6V 1.5 A

LGATE

=12V,

V

CC

50mA Source Current

V

<1.2V to

PHASE

V

>1.2V

LGATE

<1.2V to

V

LGATE

(V

UGATE-VPHASE

=12V,

=6V

=12V,

=6V

=12V

-1 A

1.5 A

1.6 3.2

Ω

=6V -1 A

1 2

Ω

50 ns

)>1.2V

50 ns

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Data Sheet

Single Phase Synchronous Buck PWM Controller With Reference Input AP3583/A

Electrical Characteristics (Continued)

VCC=12V, T

=25℃, unless otherwise specified.

A

Parameter Symbol Conditions Min Typ Max Unit

Output Voltage Accuracy

REFIN Enable Threshold V

REFIN

PROTECTION

Under Voltage Protection V

Over Current Source I

FB_UVP

OPS

Soft-start Interval tSS

Thermal Shutdown T

Thermal Shutdown Hysteresis T

OTSD

HYS

│V

FB-VREFIN

=0.4V to 1.0V,
Tracking Mode
│V

FB-VREFIN

V

REFIN

Tracking Mode

0.3 0.35 V

30 40 50

AP3583,1Stand-alone
Mode

AP3583A,1Stand-alone
Mode

160 ºC

20 ºC

│,1V

REFIN

15 mV

│/V

=1.0V to 3.0V,

REFIN

,

1.5 %

0.3 0.4 0.5 V

µA

2.6
ms

2.0

Typical Performance Characteristics

0.4

0.3

0.2

0.1

0.0

-0.1

Output Voltage Variation (%)

-0.2

-0.3
4567891011121314

Input Voltage (V)

V

OUT

=1.2V, I

1.0

0.5

0.0

-0.5

-1.0

=10A

OUT

-1.5

-2.0

-2.5

-3.0

Output Voltage Variation (%)

-3.5

-4.0
0 2 4 6 8 10 12 14 16 18 20 22

Output Current (A)

VIN=12V, V

OUT

=1.2V

Figure 4. Line Regulation Figure 5. Load Regulation

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Data Sheet

Single Phase Synchronous Buck PWM Controller With Reference Input AP3583/A

Typical Performance Characteristics (Continued)

330

320

310

300

290

280

270

260

Switching Frequency (kHz)

250

240

-50 -25 0 25 50 75 100 125 150

Temperature (oC)

For AP3583A

360
350
340
330
320
310
300
290
280
270

Switching Frequency (kHz)

260
250
240

4567891011121314

For AP3583A

Input Voltage (V)

Figure 6. Switching Frequency vs. Temperature Figure 7. Switching Frequency vs. Input Voltage

0.700

0.675

0.650

0.625

0.600

0.575

0.550

Feedback Voltage (V)

0.525

0.500

-50 -25 0 25 50 75 100 125 150

Temperature (oC)

0.605

0.604

0.603

0.602

0.601

0.600

0.599

0.598

Feedback Voltage (V)

0.597

0.596

0.595
4567891011121314

Input Voltage (V)

Figure 8. Feedback Voltage vs. Temperature Figure 9. Feedback Voltage vs. Input Voltage

Dec. 2011 Rev. 1. 1 BCD Semiconductor Manufacturing Limited

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µ

Data Sheet

Single Phase Synchronous Buck PWM Controller With Reference Input AP3583/A

Typical Performance Characteristics (Continued)

VIN

10V/div

V

OUT

0.5V/div

10A/div

(V

0.5V/div

10A/div

V

LGATE

5V/div

I

L

V

REFIN

5V/div

V

OUT

V

PHASE

10V/div

I

L

Figure 12. Enable Waveform

(VIN=12V, V

Time 1ms/div

Figure 10. Power-on Waveform Figure 11. Power-off Waveform

=12V, V

IN

OUT

=1.2V, I

=0A) (VIN=12V, V

OUT

Time 1ms/div

=0A) (VIN=12V, V

OUT

OUT

=1.2V, I

V

IN

10V/div

V

OUT

0.5V/div

V

LGATE

5V/div

I

5A/div

V

REFIN

5V/div

V

OUT

0.5V/div

V

PHASE

10V/div

10A/div

L

Time 200ms/div

OUT

=1.2V, I

=0A)

OUT

I

L

Time 40

Figure 13. Disable Waveform

OUT

s/div

=1.2V, I

OUT

=20A)

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Data Sheet

Single Phase Synchronous Buck PWM Controller With Reference Input AP3583/A

Typical Performance Characteristics (Continued)

V

OUT

2V/div

V

REFIN

2V/div

V

LGATE

10V/div

0.5V/div

10V/div

V

IN

5V/div

V

OUT

V

LGATE

I

10A/div

L

Time 10ms/div

Time 1ms/div

Figure 14. REFIN Operation
(VIN=12V, V

OUT

=1.2V, I

Figure 15. Power Input Detection

=5A) (VIN=12V, V

OUT

OUT

=1.2V, I

OUT

=0A)

V

UGATE-PHASE

2V/div

V

UGATE-PHASE

2V/div

V

V

PHASE

2V/div

V

UGATE

5V/div

V

LGATE

2V/div

Figure 16. UGATE Turn-off Waveforms Figure 17. UGATE Turn-on Waveforms

(VIN=12V, V

Time 40ns/div

=1.2V, I

OUT

=20A) (VIN=12V, V

OUT

LGATE

2V/div

V

UGATE

5V/div

V

PHASE

2V/div

Time 40ns/div

OUT

=1.2V, I

OUT

=20A)

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Data Sheet

Single Phase Synchronous Buck PWM Controller With Reference Input AP3583/A

Typical Performance Characteristics (Continued)

V

V

PHASE

5V/div

PHASE

5V/div

V

(AC)

OUT

200mV/div

V

(AC)

OUT

200mV/div

I

OUT

5A/div

Time 10µs/div

I

OUT

10A/div

Time 10µs/div

Figure 18. Load Transient Response Figure 19. Load Transient Response

(V

=12V, V

IN

OUT

=1.2V, I

=0 to 10A; 4A/µs) (VIN=12V, V

OUT

OUT

=1.2V, I

=0 to 20A; 4A/µs)

OUT

V

OUT

0.5V/div

V

PHASE

10V/div

10A/div

IL

Time 20ms/div

V

FB

1V/div
V

UGATE

20V/div

V

LGATE

10V/div

I

10A/div

L

Time 80µs/div

Figure 20. Over Current Protection Figure 21. Over Voltage Protection

(VIN=12V, V

=1.2V to 0V, I

OUT

=0A) (VIN=12V, V

OUT

OUT

=1.2V, I

OUT

=0A)

Dec. 2011 Rev. 1. 1 BCD Semiconductor Manufacturing Limited

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Data Sheet

Single Phase Synchronous Buck PWM Controller With Reference Input AP3583/A

T ypical Application

Figure 22. Typical Application Circuit of AP3583/A

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Data Sheet

Single Phase Synchronous Buck PWM Controller With Reference Input AP3583/A

Mechanical Dimensions
PSOP-8 Unit: mm(inch)

3.202(0.126)

3.402(0.134)

Dec. 2011 Rev. 1. 1 BCD Semiconductor Manufacturing Limited

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