Anpec APL5915KA Schematics

APL5915

0.8V Reference Ultra Low Dropout (0.2V@1.5A) Linear Regulator

Features

• Ultra Low Dropout

- 0.2V(typical) at 1.5A Output Current

• Low ESR Output Capacitor (Multi-layer Chip

Capacitors (MLCC)) Applicable

• 0.8V Reference Voltage

• High Output Accuracy

- ±1.5% over Line, Load, and Temperature

• Fast Transient Response

• Adjustable Output Voltage by External Resistors

• Power-On-Reset Monitoring on both VCNTL and

VIN Pins

• Internal Soft-Start

• Current-Limit Protection

• Under-Voltage Protection

• Thermal Shutdown with Hysteresis

• Power-OK Output with a Delay Time

• Shutdown for Standby or Suspend Mode

• Simple SOP-8P Package with Exposed Pad

• Lead Free and Green Devices Available

(RoHS Compliant)

General Description

The APL5915 is a 1.5A ultra low dropout linear regulator.
This product is specifically designed to provide well sup­ply volatage for motherboards NB and VGA c ard
applications. The IC needs two supply voltages, a control
voltage for the circuitry and a main supply voltage for
power conversion, to reduce power dissipation and pro­vide extremely low dropout.
The APL5915 integrates many functions into a single
package. A Power-On-Reset (POR) circuit monitors both
supply voltages to prev ent wrong operations. Thermal
shutdown and current limit functions protect the device
against thermal and current over-loads. POK indicates
the output status with time delay which is set internally. It
can control other converter for power sequence. The
APL5915 is enabled by other power system. Pulling and
holding the EN pin below 0.3V to shuts off the output.
The APL5915 is available in SOP-8P package which fea­tures small size as SOP-8 and an Exposed Pad to reduce
the junction-to-case resistance, being applicable in 1~2W
applications.

Pin Configuration

Applications

• Note Book PC Applications

• Motherboard Applications

• VGA Card Applications

Copyright  ANPEC Electronics Corp.
Rev. A.4 - Jan., 2010

1

GND

2

FB
VOUT
VOUT

= Exposed Pad
(connected to VIN plane for better heat dissipation)

VIN

3
4

SOP-8P

(Top View)

8
7
6
5

EN
POK
VCNTL
VIN

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APL5915

Ordering and Marking Information

APL5915

Assembly Material
Handling Code
Temperature Range
Package Code

Package Code
KA : SOP-8P
Operating Ambient Temperature Range
I : -40 to 85 oC
Handing Code
TR : Tape & Reel
Assembly Material
L : Lead Free Device
G : Halogen and Lead Free Device

APL5915 KA:

APL5915
XXXXX

XXXXX - Date Code

Note: ANPEC lead-free products contain molding compounds/die attach materials and 100% matte tin plate termination finish; which
are fully compliant with RoHS. ANPEC lead-free products meet or exceed the lead-free requirements of IPC/JEDEC J-STD-020D for
MSL classification at lead-free peak reflow temperature. ANPEC defines “Green” to mean lead-free (RoHS compliant) and halogen
free (Br or Cl does not exceed 900ppm by weight in homogeneous material and total of Br and Cl does not exceed 1500ppm by
weight).

Absolute Maximum Ratings

Symbol Parameter Rating Unit

V

VCNTL Supply Voltage (VCNTL to GND) -0.3 ~ 7 V

CNTL

VIN VIN Supply Voltage (VIN to GND) -0.3 ~ 3.9 V

V

EN and FB to GND -0.3 ~ V

I/O

V

POK to GND -0.3 ~ 7 V

POK

PD Power Dissipation 2.8 W
TJ Junction Temperature 150

T

Storage Temperature -65 ~ 150

STG

T

Maximum Lead Soldering Temperature, 10 Seconds 260

SDR

Note 1: Absolute Maximum Ratings are those values beyond whic h the life of a device may be impaired. Exposure to absolute
maximum rating conditions for extended periods may affect device reliability.

+0.3 V

CNTL

o

C

o

C

o

C

Thermal Characteristics

Symbol Parameter Typical Value Unit

Junction-to-Ambient Thermal Resistance in Free Air

θ

JA

θJC

Note 2: θJA is measured with the component mounted on a high effective thermal conductivity test board in free air. The exposed pad

Junction-to-Case Thermal Resistance

(Note 3)

of SOP-8P is soldered directly on the PCB.
Note 3: The “Thermal Pad Temperature” is measured on the PCB copper area connected to the thermal pad of package.

1
2

VIN

3
4

8
7
6
5

Measured Point

PCB Copper

Copyright  ANPEC Electronics C orp.
Rev. A.4 - Jan., 2010

(Note 2)

SOP-8P

SOP-8P

44

19

o

C/W

o

C/W

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APL5915

Recommended Operating Conditions

Symbol Parameter Range Unit

V

VCNTL Supply Voltage 3.1 ~ 6 V

CNTL

VIN VIN Supply Voltage 1.1 ~ 3.5 V

V

OUT

I

VOUT Output Current 0 ~ 1.5 A

OUT

V
V

CNTL
CNTL

=3.3±5%
=5.0±5%

TJ Junction Temperature -40 ~ 125

Electrical Characteristics

Output Voltage

Refer to the typical application circuit. These specifications apply over, V
to 85°C, unless otherwise specified. Typical values refer to T

Symbol

SUPPLY CURRENT

I

VCNTL Supply Current

CNTL

ISD VCNTL Shutdown Current EN = GND

POWER-ON-RESET

VCNTL POR Threshold V
VCNTL POR Hysteresis
VIN POR Threshold VIN Rising 0.8 0.9 1.0 V
VIN POR Hysteresis

OUTPUT VOLTAGE

V

Reference Voltage FB =VOUT

REF

Output Voltage Accuracy I

Line Regulation V

Load Regulation I

DROPOUT VOLTAGE

Dropout Voltage

PROTECTION

I

Current Limit

LIM

TSD Thermal Shutdown Temperature TJ Rising

Thermal Shutdown Hysteresis
Under-Voltage Threshold VFB Falling

Parameter Test Conditions

EN = VCNTL, VFB is well regulated 0.4 1 2 mA

Rising 2.7 2.9 3.1 V

CNTL

-

=0A ~1.5A, TJ= -40~125oC -1.5

OUT

=3.3 ~ 5.5V -0.13

CNTL

=0A ~1.5A

OUT

I

= 1.5A,

OUT

V

=5V,

CNTL

TJ= 25oC
I

= 1.5A,

OUT

V

=5V,

CNTL

TJ= -40~125oC

V

=5V, TJ= 25oC

CNTL

V

=5V, TJ= -40 ~ 125oC

CNTL

= 25°C.

A

V

OUT

V

OUT

V

OUT

V

OUT

= 1.2V
= 2.5V
= 1.2V
= 2.5V

CNTL

= 5V, V

IN

0.8 ~ 1.2

0.8 ~ VIN-0.2

= 1.5V, V

= 1.2V and TA = -40

OUT

APL5915

Min. Typ. Max.

-

-

180 380

0.4

0.5

-

0.8

-

-

-

0.06 0.15 %

-

0.12 0.18

-

0.17 0.23

- -

- -

2.1 2.8 3.5 A

1.8

-

-

-

- -

150

50

0.4

V

o

C

Unit

µA

-

-

-

V

V

V

+1.5 %

0.13 %/V

V

0.25

0.3

V

A

-

-

-

o

oC

V

C

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Rev. A.4 - Jan., 2010

APL5915

Electrical Characteristics (Cont.)

Refer to the typical application circuit. These specifications apply over, V
to 85°C, unless otherwise specified. Typical values refer to T

Symbol

ENABLE AND SOFT-START

EN Logic High Threshold Voltage VEN Rising 0.3 0.4 0.5 V
EN Hysteresis

EN Pin Pull-Up Current EN=GND

TSS Soft-Start Interval

POWER OK AND DELAY

V

V

T

POK

PNOK

DELAY

POK Threshold Voltage for Power
OK

POK Threshold Voltage for Power
Not OK

POK Low Voltage POK sinks 5mA

POK Delay Time 1 3 10 ms

Parameter Test Conditions

VFB Rising 90% 92% 94% V

V

Falling 79% 81% 83% V

FB

= 25°C.

A

CNTL

= 5V, V

= 1.5V, V

IN

= 1.2V and TA = -40

OUT

APL5915

Min. Typ. Max.

-

-

-

-

30
10

2

0.25 0.4 V

Unit

-

-

-

mV

µA
ms

REF

REF

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Rev. A.4 - Jan., 2010

APL5915

Typical Operating Characteristics

VCNTL Supply Current vs. Junction

Temperature

1.0

0.9

V

(mA)

CNTL

0.8

0.7

0.6

0.5

CNTL

V

CNTL

=5V

=3.3V

0.4

0.3

0.2

VCNTL Supply Current, I

0.1

0.0

-50 -25 0 25 50 75 100 125

Junction Temperature (°C)

Reference Voltage vs. Junction

Temperature

0.808

0.806

0.804

(mV)

REF

0.802

0.800

0.798

0.796

Reference Voltage, V

0.794

0.792

-50 -25 0 25 50 75 100 125

Junction Temperature (°C)

VCNTL PSRR vs. Frequency

0

V

=5V

CNTL

V

CNTLPK-PK

VIN=1.5V
I

=1A

OUT

V

=1.2V

OUT

C

=22µF

OUT

=200mV

Frequency (Hz)

-10

-20

-30

-40

-50

VCNTL PSRR (dB)

-60

-70

-80
100 1000 10000 100000 1000000

Current-Limit vs. Junction Temperature

2.9
V

=5V

CNTL

2.8

(A)

LIM

2.7

V

=3.3V

2.6

CNTL

Current-limit, I

2.5

2.4

-50 -25 0 25 50 75 100 125

Junction Temperature (°C)

POK Delay Time vs. Junction Temperature

4.5

4.3

4.1

V

=5V

3.9

CNTL

3.7

3.5

3.3

3.1

POK Delay Time (ms)

2.9

V

CNTL

=3.3V

2.7

2.5

-50 -25 0 25 50 75 100 125

Junction Temperature (°C)

VIN PSRR vs. Frequency

0

V

=5V

CNTL

-10

V

=200mV

IN PK-PK

I

=1A

OUT

-20

V

=1.2V

OUT

C

=22µF

OUT

-30

-40

-50

-60

VIN PSRR (dB)

-70

-80

-90
100 1000 10000 100000 1000000

VIN=1.5V

VIN=1.8V

VIN=1.6V

Frequency (Hz)

Copyright  ANPEC Electronics C orp.
Rev. A.4 - Jan., 2010

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APL5915

Typical Operating Characteristics (Cont.)

VIN Dropout Voltage vs. Output Current

300

V

=5V

CNTL

V

=2.5V

OUT

250

TJ=25oC

200

TJ=75oC

150

TJ=125oC

100

VIN Dropout Voltage (mV)

50

0

0 0.5 1 1.5

Output Current, l

TJ=-25oC

(A)

OUT

VIN Dropout Voltage vs. Output Current

200

V

=5V

CNTL

V

=1.2V

OUT

150

100

50

VIN Dropout Voltage (mV)

TJ=125oC

TJ=25oC

TJ=75oC

TJ=-25oC

TJ=0oC

TJ=0oC

VIN Dropout Voltage vs. Output Current

200

V

=5V

CNTL

V

=1.8V

OUT

150

TJ=75oC

100

TJ=125oC

50

VIN Dropout Voltage (mV)

0

0 0.5 1 1.5

Output Current, l

TJ=25oC

TJ=-25oC

OUT

(A)

TJ=0oC

0

0 0.5 1 1.5

Output Current, l

OUT

(A)

Copyright  ANPEC Electronics C orp.
Rev. A.4 - Jan., 2010

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APL5915

Operating Waveforms

1. Load Transient Response :

1.1 Using an Output Capacitor with ESR≥18mΩ

- C

=150µF/6.3V (ESR=30mΩ), CIN=22µF/6.3V

OUT

- I

=10mA to 1.5A to 10mA, Rise time=Fall time=1µs

OUT

I

=10mA ->1.5A I

OUT

V

VOUT

VOUT

OUT

I

IOUT

IOUT

OUT

1

1

2

2

OUT

R1=1kΩ, R2=2kΩ, C1=33nF

R1=1kΩ, R2=2kΩ, C1=33nF

R1=1kΩ, R2=2kΩ, C1=33nF

=10mA ->1.5A ->10mA I

V

VOUT

VOUT

V

VOUT

VOUT

OUT

I

IOUT

IOUT

OUT

1

1

2

2

OUT

=1.5A ->10mA

OUT

I

IOUT

IOUT

OUT

1

1

2

2

Ch1 : V
Ch2 : I
Time : 1µs/Div

, 50mV/Div

OUT

, 500mA/Div

OUT

Ch1 : V
Ch2 : I
Time : 20µs/Div

1.2 Using an MLCC as the Output Capacitor

- C

=22µF/6.3V (ESR=3mΩ), CIN=22µF/6.3V

OUT

- I

=10mA to 1.5A to 10mA, Rise time=Fall time=1µs

OUT

IOUT = 10mA ->1.5A IOUT = 10mA -> 1.5A ->10mA IOUT = 1.5A ->10mA

V

VOUT

VOUT

OUT

Ch1 : V
Ch2 : I

, 100mV/Div

OUT

, 500mA/Div

OUT

Time : 1µs/Div

IOUT

IOUT

I

OUT

1

1

2

2

Ch1 : V
Ch2 : I
Time : 20µs/Div

, 50mV/Div

OUT

, 500mA/Div

OUT

R1=39kΩ, R2=78kΩ, C1=56pF

R1=39kΩ, R2=78kΩ, C1=56pF

R1=39kΩ, R2=78kΩ, C1=56pF

V

VOUT

VOUT

OUT

I

IOUT

IOUT

OUT

, 100mV/Div

OUT

, 500mA/Div

OUT

Ch1 : V
Ch2 : I
Time : 1µs/Div

1

1

2

2

Ch1 : V
Ch2 : I
Time : 1µs/Div

V

VOUT

VOUT

OUT

OUT

OUT

, 50mV/Div

OUT

, 500mA/Div

IOUT

IOUT

, 100mV/Div

OUT

, 500mA/Div

1

1

I

OUT

2

2

Copyright  ANPEC Electronics C orp.
Rev. A.4 - Jan., 2010

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