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

APL5331

3A Bus Termination Regulator

Features

General Description (Cont.)

•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

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.

Pin Configuration

Applications

•DDR I/II SDRAM Termination

•SSTL-2/3 Termination Voltage

•Applications Requiring the Regulator with Bi-direction 3A Current Capability

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.

													5				VOUT
VIN				1		8				VCNTL			4				VREF
GND				2		7				VCNTL
													3				VCNTL
VREF				3		6				VCNTLTAB is VCNTL			2				GND
VOUT				4		5				VCNTL			1				VIN
	SOP-8 (Top View)
											TO-252-5 (Top View)
													5					VOUT
VIN			1			8			NC				4					VREF
GND			2			7			NC
													3					VCNTL
VREF			3			6				TAB is VCNTL
									VCNTL				2					GND
			4			5
VOUT									NC				1					VIN
SOP-8-P (Top View)											TO-263-5 (Top View)

NC = No internal connection

= Thermal Pad

(connected to GND plane for better heat dissipation)

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.

Copyright ANPEC Electronics Corp.	1	www.anpec.com.tw
Rev. A.8 - Oct., 2003

APL5331

Ordering and Marking Information

P a ckage C od e

A P L 53 31

K : S O P -8

K A : S O P -8 -P

U 5 : T O -252 -5

G 5 : T O -263 -5

Lead F ree C ode

T em p . R ang e

H andling C od e

C : 0 to 7 0 oC

H andling C od e

T em p . R ang e

T R : T ape & R e el

P a ckage C od e

Lead F ree C ode

L : Lead F ree D evice B lank : O rginal D evice

A P L 5331K C -T R :

A P L5331

XX XXX

-

D ate C od e

A P L5331 K A C -T R :

XX XXX

A P L5331 U 5C -T R :

A P L5331

XX XXX

-

D ate C od e

A P L5331 G 5C -T R :

XX XXX

Pin Description

PIN NAME

I/O

DESCRIPTION

Main power input pin. Connect this pin to a voltage source and an input

VIN

I

capacitor. The APL5331 sources current to VOUT pin by controlling the upper

NPN pass transistor, providing a current path from VIN pin.

Power and signal ground. Connect this pin to system ground plane with shortest

GND

O

traces. The APL5331 sinks current from VOUT pin by controlling the lower NPN

pass transistor, providing a current path to GND pin. This pin is also the ground

path for internal control circuitry.

Power input pin for internal control circuitry. Connect this pin to a voltage source,

VCNTL

I

providing a bias for the internal control circuitry. A bypass capacitor is usually

connected near this pin.

Reference voltage input and active-low shutdown control pin. Apply a voltage to

this pin as a reference voltage for the APL5331. Connect this pin to a resistor

VREF

I

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 the output.

Output pin of the regulator. Connect this pin to load. Output capacitors

VOUT

O

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

		V C NTL			V IN
		V o lta g e	The rm a l	C u rren t	V OUT
	V RE F	R e gu la t io n	L im it	L im it
			S h ut d ow n
					GND

Copyright ANPEC Electronics Corp.	2	www.anpec.com.tw
Rev. A.8 - Oct., 2003

APL5331

Absolute Maximum Ratings

Symbol	Parameter	Rating	Unit
VCNTL	VCNTL Supply Voltage, VCNTL to GND	-0.2 ~ 7	V
VIN	VIN Supply Voltage, VIN to GND	-0.2 ~ 3.9	V
PD	Power Dissipation	Internally Limited	W
TJ	Junction Temperature	150	oC
TSTG	Storage Temperature	-65 ~ 150	oC
TSDR	Soldering Temperature, 10 Seconds	300	oC
VESD	Minimum ESD Rating (Human Body Mode)	± 3	kV

Thermal Characteristics

	Symbol		Parameter		Rating	Unit
	θ JA		Thermal Resistance in Free Air
			SOP-8		160	°C/W
			SOP-8-P		80
			TO-252-5		80
			TO-263-5		50
Recommended Operating Conditions
	Symbol		Parameter		Range	Unit
	VCNTL	VCNTL Supply Voltage			3.1 ~ 6V	V
	VIN	VIN Supply Voltage		1.6 ~ 3.5		V
	VREF	VREF Input Voltage		0.8 ~ 1.75		V
	IOUT	VOUT Output Current (Note1, 2)		-3 ~ +3		A
	TJ	Junction Temperature		0 ~ 125		oC

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.

Copyright ANPEC Electronics Corp.	3	www.anpec.com.tw
Rev. A.8 - Oct., 2003

APL5331

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.

Symbol		Parameter	Test Conditions		APL5331			Unit
					Min	Typ	Max
Output Voltage
VOUT		VOUT Output Voltage	IOUT=0A			VREF		V
		System Accuracy	Over temperature, VOUT offset, and		-20		20	mV
			load regulation
VOS		VOUT Offset Voltage	IOUT=+10mA		-14	-9		mV
		(VOUT–VREF)	IOUT=-10mA			2	8
		Load Regulation	IOUT=+10mA to +3A		-6	-3		mV
			IOUT = -10mA to -3A			7	12
Protection
			Sourcing Current	TJ=25°C	+3.3	+3.6
			(VIN=2.5V)	TJ=125°C		+3.1
			Sinking Current	TJ=25°C	-3.3	-3.6
ILIM		Current Limit	(VIN=2.5V)	TJ=125°C		-3.1		A
			Sourcing Current	TJ=25°C	+2.9	+3.2
			(VIN=1.8V)	TJ=125°C		+2.6
			Sinking Current	TJ=25°C	-2.9	-3.2
			(VIN=1.8V)	TJ=125°C		-2.6
TSD		Thermal Shutdown	Rising TJ			150		oC
		Temperature
		Thermal Shutdown Hysteresis				40		oC
Input Current
			IOUT=0A		2	4.5	6
ICNTL	VCNTL Supply Current		IOUT=± 3A (Normal Operation),			50	110	mA
			VCNTL=5V
			VREF=GND (Shutdown)			2.6
IVREF	VREF Bias Current		VREF=1.25V/0.9V (Normal Operation)			150	500	nA
	(The current flows out of VREF)		VREF=GND (Shutdown)			20	40	A
Shutdown Control
	Shutdown Threshold Voltage				0.2	0.35	0.65	V

Copyright ANPEC Electronics Corp.	4	www.anpec.com.tw
Rev. A.8 - Oct., 2003

APL5331

Typical Application Circuit

1. VOUT=1.25V/0.9V Application

VCN TL

+3.3V

VIN

VIN

VC N TL

+2.5V/1.8V

R 1

CIN

1k

VR EF GN D VOU T

VREF

470uF

CCN TL

Shutdown

R2

CSS

GND

Q1

1k

0.1uF

47uF

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

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

VCNT L

+5V

VIN							VIN	VC N TL
+2.8V
				R1
CIN				1k			VR EF GN D VOU T
						VRE F
470 F								CCNT L
				R2		CS S
				1k		0.1 F		47 F
GND

VOU T

+1.25V/0.9V

-3~+3A

COU T

470uF

GND

VO UT

+1.4V/ -3~+3A

CO UT

470 F

GND

Copyright ANPEC Electronics Corp.	5	www.anpec.com.tw
Rev. A.8 - Oct., 2003

APL5331

Typical Characteristics

Sourcing Current-Limit vs Junction Temperature

	5.0
		VCNTL=5V,VIN=2.5V
(A)	4.5			VCNTL=3.3V,VIN=2.5V
ILIM	4.0
-Limit,	3.5
Current	3.0	VCNTL=5V,VIN=1.8V
	2.5			VCNTL=3.3V,VIN=1.8V
	2.0
	-50	-25	0	25	50	75	100	125

Sinking Current-Limit vs Junction Temperature

	-2.0
(A)	-2.5			VCNTL=5V,VIN=1.8V
		VCNTL=3.3V,VIN=1.8V
ILIM
	-3.0
-Limit,	-3.5
Current	-4.0				VCNTL=3.3V,VIN=2.5V
		VCNTL=5V,VIN=2.5V
	-4.5
	-5.0
	-50	-25	0	25	50	75	100	125

Junction Temperature (°C)

Junction Temperature (°C)

	VREF Bias Current	VREF Shutdown Threshold
	vs Junction Temperature
		vs Junction Temperature

	0.40								0.6
VREF Bias Current, IVREF ( A)	VREF=1.25V/0.9V
	0.35
	0.30								0.5
											VCNTL=5V
	0.25								0.4
	0.20
	0.15								0.3
	0.10											VCNTL=3.3V
	0.05								0.2
									ThresholdShutdownVREF(V)
	0.00								0.1
	-50	-25	0	25	50	75	100	125	-50	-25	0	25	50	75	100	125

Junction Temperature (°C)

Junction Temperature (°C)

Copyright ANPEC Electronics Corp.	6	www.anpec.com.tw
Rev. A.8 - Oct., 2003