Diodes AP2552AFDC, AP2552AW6, AP2552FDC, AP2552W6, AP2553AFDC Schematic [ru]

AP2552/ AP2553/ AP2552A/ AP2553A

PRECISION ADJUSTABLE CURRENT-LIMITED POWER SWITCHES

Description

The AP2552/53 and AP2552A/53A are single channel precision adjustable current-limited switches optimized for applications that require precision current limiting, or to provide up to 2.1A of continuous load current during heavy loads/short circuits. These devices offer a programmable current-limit threshold between 75mA and 2.36A (typ) via an external resistor. Current limit accuracy ±6% can be achieved at high current-limit settings. The rise and fall times are controlled to minimize current surges during turn on/off.

The devices have fast short-circuit response time for improved overall system robustness. They provide a complete protection solution for applications subject to heavy capacitive loads and the prospect of short circuit, offering reverse current blocking and limiting, overcurrent, over-temperature and short-circuit protection, as well as controlled rise time and under-voltage lockout functionality. A 7ms deglitch capability on the open-drain Flag output prevents false over-current reporting and does not require any external components.

Pin Assignments

	(Top View)
OUT	1	6	IN
ILIM	2	PAD 5	GND
	3	4	EN
FAULT

U-DFN2020-6

	Top View
IN	1	6	OUT

AP2552/53 limits the output current to a safe level when the output current exceeds current-limit threshold.

AP2552A/53A provides latch-off function during over-current or reverse-voltage conditions.

All devices are available in SOT26 and U-DFN2020-6 packages.

Applications

Set-Top Boxes

LCD TVs & Monitors

Residential Gateways

Laptops, Desktops, Servers, e-Readers, Printers, Docking Stations, HUBs

GND		2	5		ILIM
EN		3	4		FAULT
			SOT26

Features

Up to 2.1A Maximum Load Current

Accurate Adjustable Current Limit, 75mA - 2360mA

±6% Accurate Adjustable Current Limit, 1.63A with RLIM = 15kΩ

Constant-Current (AP2552/53) During Over-Current

Output Latch-Off (AP2552A/53A) at Over-Current

Fast Short-Circuit Response Time: 2µs (typ)

Reverse Current Blocking During Shutdown and Reverse Current Limiting During Enable

Operating Range: 2.7V - 5.5V

Built-in Soft-Start with 3ms Typical Rise Time

Over-Current , Output Over-Voltage and Thermal Protection

Fault Report (FAULT) with Blanking Time

ESD Protection: 2kV HBM, 500V CDM

Active Low (AP2552/52A) or Active High (AP2553/53A) Enable

Ambient Temperature Range: -40ºC to +85°C

SOT26 and U-DFN2020-6 Package: Available in “Green” Molding Compound (No Br, Sb)

Totally Lead-Free & Fully RoHS Compliant (Notes 1 & 2)

Halogen and Antimony Free. “Green” Device (Note 3)

15kV ESD Protection per IEC 61000-4-2 (with external capacitance)

UL Recognized, File Number E322375, Vol. 1

1IEC60950-1 CB Scheme Certified

Notes:	1.	No purposely added lead. Fully EU Directive 2002/95/EC (RoHS) & 2011/65/EU (RoHS 2) compliant.
	2.	See http://www.diodes.com/quality/lead_free.html for more information about Diodes Incorporated’s definitions of Halogenand Antimony-free, "Green"
		and Lead-free.
	3.	Halogenand Antimony-free "Green” products are defined as those which contain <900ppm bromine, <900ppm chlorine (<1500ppm total Br + Cl) and
		<1000ppm antimony compounds.

AP2552/AP2553/AP2552A/AP2553A	1 of 17	October 2014
Document number: DS35404 Rev. 10 - 2	www.diodes.com	© Diodes Incorporated

AP2552/ AP2553/ AP2552A/ AP2553A

Typical Applications Circuit

120µF Output Capacitance is a Requirement of USB

Available Options

	Part Number	Channel	Enable Pin (EN)	Recommended Maximum	Current-Limit	Package
				Continuous Load Current (A)	Protection
	AP2552	1	Active Low	2.1	Constant-Current	U-DFN2020-6
	AP2553	1	Active High			SOT26
	AP2552A	1	Active Low	2.1	Latch-Off	U-DFN2020-6
	AP2553A	1	Active High			SOT26

Pin Descriptions

			Pin				Pin Number			I/O	Function
		Name				AP2552W6-7	AP2553W6-7	AP2552FDC-7	AP2553FDC-7
			IN			1	1	6	6	I	Input, connect a 0.1µF or greater ceramic capacitor from
											IN to GND as close to IC as possible.
		GND				2	2	5	5	—	Ground, connect to external exposed pad.
						3	—	4	—	I	Enable input, logic low turns on power switch.
			EN
			EN			—	3	—	4	I	Enable input, logic high turns on power switch.
						4	4	3	3	O	Active-low open-drain output, asserted during over-
	FAULT
											current, over-temperature, or reverse-voltage conditions.
		ILIM				5	5	2	2	O	Use external resistor to set current-limit threshold;
											recommended 10kΩ RLIM 232kΩ.
		OUT				6	6	1	1	O	Output
	Exposed										No internal connection; recommend to connect to GND
						—	—	Pad	Pad	—	externally for improved power dissipation. It should not be
		Pad
											used as electrical ground conduction path.

AP2552/AP2553/AP2552A/AP2553A	2 of 17	October 2014
Document number: DS35404 Rev. 10 - 2	www.diodes.com	© Diodes Incorporated

AP2552/ AP2553/ AP2552A/ AP2553A

Functional Block Diagram

AP2552/AP2553/AP2552A/AP2553A

3 of 17

October 2014

Document number: DS35404 Rev. 10 - 2

www.diodes.com

© Diodes Incorporated

AP2552/ AP2553/ AP2552A/ AP2553A

Absolute Maximum Ratings (@TA = +25°C, unless otherwise specified.)

Symbol

Parameter

Ratings

Unit

HBM

Human Body Model ESD Protection

2

kV

ESD

CDM

Charged Device Model ESD Protection

500

V

IEC system

Surges per EN61000-4-2. 1999 Applied to Output

15

kV

level

Terminals of EVM Note (5)

VIN, VOUT, V

,

FAULT

-0.3 to +6.5

V

Voltage on IN, OUT,

, ILIM, EN, EN

VILIM, VEN, V

FAULT

EN

—

Continuous

Sink Current

25

mA

FAULT

—

ILIM Source Current

1

mA

ILOAD

Maximum Continuous Load Current

Internal Limited

A

TJ(MAX)

Maximum Junction Temperature

-40 to +150

°C

TST

Storage Temperature Range (Note 4)

-65 to +150

°C

Notes:

4. UL Recognized Rating from -30°C to +70°C (Diodes qualified TST from -65°C to +150°C).

5.External capacitors need to be connected to the output, EVM board was tested with capacitor 2.2uF 50V 0805. This level is a pass test only and not a limit.

Caution: Stresses greater than the 'Absolute Maximum Ratings' specified above, may cause permanent damage to the device. These are stress ratings only; functional operation of the device at these or any other conditions exceeding those indicated in this specification is not implied. Device reliability may be affected by exposure to absolute maximum rating conditions for extended periods of time.

Semiconductor devices are ESD sensitive and may be damaged by exposure to ESD events. Suitable ESD precautions should be taken when handling and transporting these devices.

Dissipation Rating Table

			Thermal	Thermal	TA ≤ +25°C	Derating Factor	TA = +70°C	TA = +85°C
	Board	Package	Resistance	Resistance	Power	Above		Power
							Power Rating
			θJA	θJC	Rating	TA = +25°C		Rating
High-K (Note 6)		W6	160°C/W	55°C/W	625mW	6.25mW/°C	340mW	250mW
High-K (Note 6)		FDC	120°C/W	34°C/W	833mW	8.33mW/°C	450mW	330mW
Note:	6. The JEDEC high-K (2s2p) board used to derive this data was a 3in x 3in, multilayer board with 1oz internal power and ground planes with
	2oz copper traces on top and bottom of the board.

Recommended Operating Conditions (@TA = +25°C, unless otherwise specified.)

Symbol

Parameter

Min

Max

Unit

VIN

Input Voltage

2.7

5.5

V

IOUT

Continuous Output Current (-40°C ≤ TA ≤ +85°C)

0

2.1

A

VEN, V

Enable Voltage

0

5.5

V

EN

VIH

High-Level Input Voltage on EN or

2.0

VIN

V

EN

VIL

Low-Level Input Voltage on EN or

0

0.8

V

EN

RLIM

Current-Limit Threshold Resistor Range

10

210

kΩ

(1% initial tolerance)

IO

Continuous

Sink Current

0

10

mA

FAULT

Input De-Coupling Capacitance, IN to GND

0.1

µF

TA

Operating Ambient Temperature

-40

+85

C

TJ

Operating Junction Temperature

-40

+125

C

AP2552/AP2553/AP2552A/AP2553A	4 of 17	October 2014
Document number: DS35404 Rev. 10 - 2	www.diodes.com	© Diodes Incorporated

AP2552/ AP2553/ AP2552A/ AP2553A

Electrical Characteristics (@TA = +25°C, VIN = 2.7V to 5.5V, VEN = 0V or VEN = VIN, RFAULT = 10kΩ, unless otherwise specified.)

	Symbol		Parameter	Test Conditions (Note 7)			Min	Typ	Max	Unit
	Supply
	VUVLO		Input UVLO	VIN Rising				2.4	2.65	V
	VUVLO		Input UVLO Hysteresis	VIN Decreasing				25		mV
	ISHDN		Input Shutdown Current	VIN = 5.5V, Disabled, OUT = Open				0.1	1	µA
	IQ		Input Quiescent Current	VIN = 5.5V, Enabled, OUT = Open, RLIM = 20kΩ				100	140	µA
				VIN = 5.5V, Enabled, OUT = Open, RLIM = 210kΩ				80	120	µA
	IREV		Reverse Leakage Current	Disabled, VIN = 0V, VOUT = 5.5V, IREV at VIN				0.01	1	µA
	Power Switch
				SOT26 Package,	TJ = +25°C, VIN = 5.0V			70	95
	RDS(ON)		Switch On-Resistance		-40°C ≤ TA	≤ +85°C			135	mΩ
				U-DFN2020-6 Package	TJ = +25°C, VIN = 5.0V			80	105
					-40°C ≤ TA	≤ +85°C			150
	tR		Output Turn-On Rise Time	VIN = 5.5V, CL = 1µF, RLOAD = 100Ω. See Figure 1				1.1	1.5	ms
				VIN = 2.7V, CL = 1µF, RLOAD = 100Ω.				0.7	1	ms
	tF		Output Turn-Off Fall Time	VIN = 5.5V, CL = 1µF, RLOAD = 100Ω. See Figure 1			0.1		0.5	ms
				VIN = 2.7V, CL = 1µF, RLOAD = 100Ω.			0.1		0.5	ms
	Current Limit
				RLIM = 10kΩ	-40°C ≤ TA ≤ +85°C		2200	2365	2542
				RLIM = 15kΩ	-40°C ≤ TA ≤ +85°C		1540	1632	1730
			Current-Limit Threshold	RLIM = 20kΩ	TJ = +25°C		1180	1251	1326
					-40°C ≤ TA	≤ +85°C	1160	1251	1340
	ILIMIT		(maximum DC output current),							mA
					TJ = +25°C		500	530	562
			VOUT = VIN -0.5V	RLIM = 49.9kΩ
					-40°C ≤ TA	≤ +85°C	485	529	573
				RLIM = 210kΩ			121	142	162
				ILIM Shorted to IN or GND			50	75	100
				RLIM = 10kΩ				2620
				RLIM = 15kΩ				1820
	ISHORT		Short-Circuit Current Limit, OUT	RLIM = 20kΩ				1380		mA
			Connected to GND	RLIM = 49.9kΩ				570
				RLIM = 210kΩ				150
				ILIM Shorted to IN or GND				75
	tSHORT		Short-Circuit Response Time	VOUT = 0V to IOUT = ILIMIT (OUT shorted to ground)				2		µs
				See Figure 2
	Enable Pin
	ILEAK-EN		EN Input Leakage Current	VIN = 5V, VEN = 0V and 6V			-0.5		0.5	µA
	tON		Turn-On Time	CL = 1µF, RL = 100Ω. See Figure 1					3	ms
	tOFF		Turn-Off Time	CL = 1µF, RL = 100Ω. See Figure 1					1	ms
	Output Discharge
	RDIS		Discharge Resistance (Note 8)	VIN = 5V, Disabled, IOUT =1mA				600		Ω
	RDIS_LATCH		Discharge Resistance During	VIN = 5V, Latch-Off, AP2552A/53A Only				1000		Ω
			Latch-Off
	Notes:	7. Pulse-testing techniques maintain junction temperature close to ambient temperature; thermal effects must be taken into account separately.

8.The discharge function is active when the device is disabled (when enable is de-asserted or during power-up power-down when VIN< VUVLO). The discharge function offers a resistive discharge path for the external storage capacitor for limited time.

AP2552/AP2553/AP2552A/AP2553A	5 of 17	October 2014
Document number: DS35404 Rev. 10 - 2	www.diodes.com	© Diodes Incorporated

AP2552/ AP2553/ AP2552A/ AP2553A

Electrical Characteristics (cont.)

(@TA = +25°C, VIN = 2.7V to 5.5V, VEN = 0V or VEN = VIN, RFAULT = 10kΩ, unless otherwise specified.)

	Symbol	Parameter	Test Conditions (Note 6)	Min	Typ	Max	Unit
	Reverse Voltage Protection
	VRVP	Reverse-Voltage Comparator Trip Point	VOUT – VIN	95	135	190	mV
	IROCP	Reverse Current Limit	VOUT – VIN = 200mV		0.72		A
		Time from Reverse-Voltage Condition to
	tTRIG	MOSFET Turn Off	VIN = 5V	3	4.75	7	ms
		(AP2552A/AP2553A)
	Fault Flag
	VOL	FAULT Output Low Voltage	IFAULT = 1mA			180	mV
	IFOH	FAULT Off Current	VFAULT = 6V			1	µA
	tBlank_OC	FAULT Blanking and Latch Off Time	Assertion or deassertion due to overcurrent	5	7.5	10	ms
		(Over-Current)
	tBlank_RV	FAULT Blanking Time	Assertion or deassertion due to	2	3.75	6	ms
		(Reverse-Voltage)	reverse-voltage
	Thermal Shutdown
	TSHDN	Thermal Shutdown Threshold	Enabled, RLOAD = 1kΩ		160		°C
	TSHDN_OCP	Thermal Shutdown Threshold under	Enabled, RLOAD = 1kΩ		140		°C
		Current Limit
	THYS	Thermal Shutdown Hysteresis			20		°C

Typical Performance Characteristics

VEN	50%		50%	VEN	50%		50%
		TR	TD(OFF)			TR	TD(OFF)
			TF				TF
	TD(ON)	90%	90%		TD(ON)	90%	90%
VOUT		10%	10%	VOUT		10%	10%

Figure 1 Voltage Waveforms: AP2552/52A (left), AP2553/53A (right)

Figure 2 Response Time to Short Circuit Waveform

AP2552/AP2553/AP2552A/AP2553A	6 of 17	October 2014
Document number: DS35404 Rev. 10 - 2	www.diodes.com	© Diodes Incorporated