ANPEC APL5331U5C-TRL, APL5331U5C-TR, APL5331KC-TRL, APL5331KC-TR, APL5331KAC-TRL Datasheet

3A Bus Termination Regulator

Copyright  ANPEC Electronics Corp.
Rev. A.8 - Oct., 2003

APL5331

www.anpec.com.tw1

ANPEC reserves the right to make changes to improve reliability or manufacturability without notice, and advise
customers to obtain the latest version of relevant information to verify before placing orders.

••

••

• Provide Bi-direction Current

 - Sourcing or Sinking Current up to 3A

••

••

• 1.25V/0.9V Output for DDR I/II Applications

••

••

• Fast Transient Response

••

••

• High Output Accuracy

- ±20mV over Load, VOUT Offset and
Temperature

••

••

• Adjustable Output Voltage by External Resistors

••

••

• Current-Limit Protection

••

••

• On-Chip Thermal Shutdown

••

••

• Shutdown for Standby or Suspend Mode

••

••

• Simple SOP-8, SOP-8-P with thermal pad,

TO-252- 5 and TO-263-5 Packages

Features General Description (Cont.)

On-chip thermal shutdown provides protection against
any combination of overload that would create ex­cessive junction temperature. The output voltage of
APL5331 track the voltage at VREF pin. A resistor
divider connected to VIN, GND and VREF pins is
used to provide a half voltage of VIN to VREF pin. In
addition, an external ceramic capacitor and an open­drain transistor connected to VREF pin provides soft­start and shutdown control respectively. Pulling and
holding the VREF to GND shuts off the output. The
output of APL5331 will be high impedance after be­ing shut down by VREF or thermal shutdown function.

Applications

• DDR I/II SDRAM Termination

• SSTL-2/3 Termination Voltage

• Applications Requiring the Regulator with





Bi-direction 3A Current Capability

Pin Configuration

TO-252-5 (Top View)

VOUT
VREF

VCNTL
GND

VIN

12345

TAB is VCNTL

TO-263-5 (Top View)

VIN

GND

VCNTL

VREF

VOUT

1

2

3

4

5

TAB is VCNTL

SOP-8 (Top View)

1
2
3
45

6

7

8

VIN

GND

VREF

VOUT VCNTL

VCNTL

VCNTL

VCNTL

General Description

The APL5331 linear regulator is designed to provide
a regulated voltage with bi-directional output current
for DDR-SDRAM termination. The APL5331 integrates
two power transistors to source or sink current up to
3A. It also incorporate current-limit, thermal shut­down and shutdown control functions into a single
chip. Current-limit circuit limits the short-circuit
current.

1
2
3
45

6

7

8

VIN

GND

VREF

VOUT

NC

VCNTL

NC

NC

SOP-8-P (Top View)

= Thermal Pad

NC = No internal connection

(connected to GND plane for better heat
dissipation)

Copyright  ANPEC Electronics Corp.
Rev. A.8 - Oct., 2003

APL5331

www.anpec.com.tw2

Package Code
K : SOP-8 KA : SOP-8-P
U5 : TO-252-5 G5 : T O-263-5
Tem p. Range

C : 0 to 7 0

o

C

Handling Code

TR : Tape & Re el
Lead Free Code
L : Lead Free Device Blank : Orginal Device

APL5331

Handling Code
Tem p. Range
Package Code

APL5331
XXXXX

APL5331K C-TR :
APL5331 KAC -TR :

XXXXX - Date Code

APL5331
XXXXX

APL5331 U5C -TR :
APL5331 G5C -TR :

XXXXX - Date Code

Lead Free Code

Ordering and Marking Information

Pin Description

PIN NAME I/O DESCRIPTION

VIN I

Main power input pin. Connect this pin to a voltage source and an input
capacitor. The APL5331 sources current to VOUT pin by controlling the upper
NPN pass transistor, providing a current path from VIN pin.

GND O

Power and signal ground. Connect this pin to system ground plane with shortest
traces. The APL5331 sinks current from VOUT pin by controlling the lower NPN
pass transistor, providing a current path to GN D pin. This pin is also the ground
path fo r inter n a l co n tr o l c ircu itry.

VCNTL I

Power input pin for internal control circuitry. Connect this pin to a voltage source,
providing a bias for the internal control circuitry. A bypass capacitor is usually
connected near this pin.

VREF I

Reference voltage input and active-low shutdown control pin. Apply a voltage to
this pin as a reference voltage for the AP L5331. Connect this pin to a resistor
divider, between VIN and GND, and a capacitor for soft-start and filtering noise
purposes. Applying and holding this pin low by an open-drain transistor to shut
down th e o u tp u t.

VOUT O

Output pin of the regulator. Connect this pin to load. Output capacitors
connected this pin improves stability and transient response. The output voltage
tracks the reference voltage and is capable of sourcing or sinking current up to
3A.



Block Diagram

GND

VOUT

VIN

VCNTL

VREF

Current

Limit

Therm al

Limit

Voltage

Regulation

Shutdown

Copyright  ANPEC Electronics Corp.
Rev. A.8 - Oct., 2003

APL5331

www.anpec.com.tw3

Symbol Parameter Range Unit

V

CNTL

VCNTL Supply Voltage 3.1 ~ 6V V

V

IN

VIN Supply Voltage 1.6 ~ 3.5 V

V

REF

VREF Input Voltage 0.8 ~ 1.75 V

I

OUT

VOUT Output Current (Note1, 2) -3 ~ +3 A

T

J

Junction Temperature 0 ~ 125

o

C



Symbol Parameter Rating Unit

V

CNTL

VCNTL Supply Voltage, VCNTL to GND -0.2 ~ 7 V

V

IN

VIN Supply Voltage, VIN to G ND -0.2 ~ 3.9 V

P

D

Power Dissipation Internally Limited W

T

J

Junction Temperature 150

o

C

T

STG

Storage Temperature -65 ~ 150

o

C

T

SDR

Soldering Temperature, 10 Seconds 300

o

C

V

ESD

Minimum ESD R ating (Human Body Mode)

±3

kV



Note1 : The symbol “+” means the VOUT sources current to load; the symbol “-“ means the VOUT sinks
current to GND.
Note2 : The max. IOUT varies with the TJ. Please refer to the typical characteristics.

Absolute Maximum Ratings

Thermal Characteristics

Symbol

Parameter Rating Unit

θ

JA

Thermal Resistance in Free Air

SOP-8

SOP-8-P
TO-252-5
TO-263-5

160

80
80
50

°C/W

Recommended Operating Conditions

Copyright  ANPEC Electronics Corp.
Rev. A.8 - Oct., 2003

APL5331

www.anpec.com.tw4

Electrical Characteristics

Refer to the typical application circuit. These specifications apply over, VCNTL=3.3V, VIN=2.5V/1.8V,
VREF=0.5VIN and TJ= 0 to 125°C, unless otherwise specified. Typical values refer to TJ =25°C.

APL5331

Symbol

Parameter Test Conditions

Min Typ Max

Unit

Output Voltage

V

OUT

VOUT O utput Voltage I

OUT

=0A

V

REF

V

System Accuracy

Over temperature, VOUT offset, and
load regulation

-20 20 mV

I

OUT

=+10mA -14

-9

V

OS

VOUT O ffset Voltage
(V

OUT–VREF

)

I

OUT

=-10mA

2

8

mV

I

OUT

=+10mA to +3A -6

-3

Load Regulation

I

OUT

= -10 mA to -3 A

7

12

mV

Protection

Sourcing Current TJ=25°C
(V

IN

=2.5V) TJ=125°C

+3.3 +3.6

+3.1



Sinking Current TJ=25°C
(V

IN

=2.5V) TJ=125°C

-3.3 -3.6

-3.1



Sourcing Current TJ=25°C
(V

IN

=1.8V) TJ=125°C

+2.9 +3.2

+2.6



I

LIM



Current Limit

Sinking Current T

J

=25°C

(V

IN

=1.8V) TJ=125°C

-2.9 -3.2

-2.6



A

T

SD



Thermal Shutdown
Tem perature

Rising T

J





150



o

C

 Therm al Shutdown Hysteresis





40



o

C



Input Current

I

OUT

=0A 2

4.5

6

I

OUT

=±3A (Norm al Operation),

V

CNTL

=5V



50 110

I

CNTL



VCNTL S upply Current

V

REF

=GND (S hutdown)



2.6



mA

V

REF

=1.25V/0.9V (Normal Operation)



150

500 nA

I

VREF



VREF Bias Current
(The current flows out of VREF)

V

REF

=GND (Shutdown)



20

40

µA

Shutdown Control



Shutdown Threshold Voltage



0.2

0.35

0.65 V



Copyright  ANPEC Electronics Corp.
Rev. A.8 - Oct., 2003

APL5331

www.anpec.com.tw5

Typical Application Circuit

COUT : 470µF, ESR=25mΩ
R1, R2 : 1kΩ, 1%
Q1 : APM2300 AC

V

CNTL

+3.3V

C

CNTL

47uF

V

OUT

+1.25V/0.9V

-3~+3A

C

SS

0.1uF

GND

R

1

1k

R

2

1k

V

IN

+2.5V/1.8 V

GND

C

IN

470uF

Q

1

Shutdown

C

OUT

470uF

V

REF

GND

VREF

VIN

VOU T

VCNTL

Note : Since R1 and R2 are very small, the voltage offset
caused by the bias current of VREF can be ignore.

2. VOUT=1.4V Application

V

CNTL

+5V

C

CNTL

47µF

V

OUT

+1.4V/

-3~+3A

C

SS

0.1µF

GND

R

1

1k

R

2

1k

V

IN

+2.8V

GND

C

IN

470µF

C

OUT

470µF

V

REF

GND

VREF

VIN

VOU T

VCNTL

1. VOUT=1.25V/0.9V Application

Copyright  ANPEC Electronics Corp.
Rev. A.8 - Oct., 2003

APL5331

www.anpec.com.tw6

2.0

2.5

3.0

3.5

4.0

4.5

5.0

-50 -25 0 25 50 75 100 125

-5.0

-4.5

-4.0

-3.5

-3.0

-2.5

-2.0

-50 -25 0 25 50 75 100 125

0.00

0.05

0.10

0.15

0.20

0.25

0.30

0.35

0.40

-50 -25 0 25 50 75 100 125

Typical Characteristics

Sourcing Current-Limit

vs Junction T emperature

Current-Limit, ILIM (A)

Junction Temperature (°C)

VREF Bias Current

vs Junction T emperature

Junction Temperature (°C)

VREF Bias Current, IVREF (µA)

Junction Temperature (°C)

VREF Shutdown Threshold (V)

Junction Temperature (°C)

Current-Limit, ILIM (A)

Sinking Current-Limit

vs Junction T emperature

VREF Shutdown Threshold

vs Junction T emperature

V

REF

=1.25V/0.9V

0.1

0.2

0.3

0.4

0.5

0.6

-50 -25 0 25 50 75 100 125

V

CNTL

=5V

V

CNTL

=3.3V

VCNTL=5V,VIN=2.5V

VCNTL=3.3V,VIN=2.5V

VCNTL=5V,VIN=1.8V

VCNTL=3.3V,VIN=1.8V

VCNTL=5V,VIN=1.8V

VCNTL=3.3V,VIN=1.8V

VCNTL=3.3V,VIN=2.5V

VCNTL=5V,VIN=2.5V