Richtek RT8010-10GQW, RT8010-10PQV, RT8010-10PQW, RT8010-12GQW, RT8010-12PQV, RT8010-12PQW, RT8010-15GQW, RT8010-15PQV, RT8010-15PQW, RT8010-16PQW, RT8010-18GQW, RT8010-18PQV, RT8010-18PQW, RT8010-25GQW, RT8010-25PQV, RT8010-25PQW, RT8010-33GQW, RT8010-33PQV, RT8010-33PQW, RT8010AGQW, RT8010APQW, RT8010GQW, RT8010PQV, RT8010PQW Schematic [ru]

RT8010/A

1.5MHz, 1A, High Efficiency PWM Step-Down DC/DC Converter

General Description

The RT8010/A is a high efficiency Pulse-Width-Modulated (PWM) step-down DC/DC converter. Capable of delivering 1A output current over a wide input voltage range from 2.5V to 5.5V, the RT8010/A is ideally suited for portable electronic devices that are powered from 1-cell Li-ion battery or from other power sources such as cellular phones, PDAs and hand-held devices.

Two operating modes are available including : PWM/LowDropout autoswitch and shutdown modes. The Internal synchronous rectifier with low RDS(ON) dramatically reduces conduction loss at PWM mode. No external Schottky diode is required in practical application.

The RT8010/A enters Low Dropout mode when normal PWM cannot provide regulated output voltage by continuously turning on the upper P-MOSFET. RT8010/A enter shut-down mode and consumes less than 0.1μA when EN pin is pulled low.

The switching ripple is easily smoothed-out by small package filtering elements due to a fixed operating frequency of 1.5MHz. This along with small WDFN-6L 2x2 and WQFN-16L 3x3 package provides small PCB area application. Other features include soft start, lower internal reference voltage with 2% accuracy, over temperature protection, and over current protection.

Pin Configurations

(TOP VIEW)

IC LX LX LX

						16 15		14	13
					GND	1				12	VIN
IC	1		6	FB/VOUT	GND	2				11	VIN
					GND	3				10	VIN
EN 2			5	GND				17
		7			FB/VOUT	4				9	VIN
VIN	3		4	LX
						5	6	7	8

	GND IC EN IC
WDFN-6L 2x2 (RT8010)	WQFN-16L 3x3 (RT8010A)

Marking Information

For marking information, contact our sales representative directly or through a Richtek distributor located in your area.

Features

2.5V to 5.5V Input Range

Output Voltage (Adjustable Output From 0.6V to VIN)

`RT8010 : 1V, 1.2V, 1.5V, 1.6V, 1.8V, 2.5V and 3.3V Fixed/Adjustable Output Voltage

`RT8010A Adjustable Output Voltage Only

1A Output Current

95% Efficiency

No Schottky Diode Required

1.5MHz Fixed-Frequency PWM Operation

Small 6-Lead WDFN and 16-Lead WQFN Package RoHS Compliant and 100% Lead (Pb)-Free

Applications

Mobile Phones

Personal Information Appliances

Wireless and DSL Modems

MP3 Players

Portable Instruments

Ordering Information

RT8010/A(-)

Package Type

QW : WDFN/WQFN (W-Type)

Lead Plating System P : Pb Free

G : Green (Halogen Free and Pb Free)

Output Voltage

Default : Adjustable (RT8010/A) Fixed (RT8010)

10 : 1.0V

12 : 1.2V

15 : 1.5V

16 : 1.6V

18 : 1.8V

25 : 2.5V

33 : 3.3V

WQFN-16L 3x3

WDFN-6L 2x2

Note :

Richtek products are :

`RoHS compliant and compatible with the current requirements of IPC/JEDEC J-STD-020.

`Suitable for use in SnPb or Pb-free soldering processes.

is a registered trademark of Richtek Technology Corporation.

DS8010/A-09 September 2012	www.richtek.com
	1

RT8010/A

Typical Application Circuit

VIN

2.2µH

2.5V to 5.5V

CIN

VOUT

RT8010/A

4.7µF

COUT

VOUT

1 IC

GND

10µF

Figure 1. Fixed Voltage Regulator

VIN

2.2µH

VOUT

2.5V to 5.5V

CIN

RT8010/A

4.7µF

COUT

1 IC

GND

10µF

IR2

VOUT = VREF x 1

with R2 = 300kΩ to 60kΩ so the IR2 = 2μA to 10μA,

and (R1 x C1) should be in the range between 3x10-6 and 6x10-6 for component selection.

				Figure 2. Adjustable Voltage Regulator
Layout Guide
	RT8010/A_FIX					RT8010/A_ADJ
	RT8010/A_FIX
IC	1	6 VOUT			IC	1	6	FB	Output
IC	1	6 VOUT		Output capacitor					capacitor
				must be near	EN	2	5	GND	must be near
EN	2	5 GND		RT8010				L1	RT8010/A
				L1	VIN	3	4	LX
VIN	3	4 LX			VIN	3	4	LX
VIN	3	4 LX								R1
								COUT		R1
				COUT				COUT
				COUT				LX should be
						CIN		LX should be		R2
	CIN		LX should be connected			CIN		connected to		R2
	CIN							Inductor by wide
								Inductor by wide
	CIN must be placed		to Inductor by wide and		CIN must be placed			and short trace,
	to the VIN as close		short trace, keep		to the VIN as close			keep sensitive
	as possible.		sensitive components		as possible.			components away
			away from this trace.					from this trace.

Figure 3

Layout note :

1.The distance that CIN connects to VIN is as close as possible (Under 2mm).

2.COUT should be placed near RT8010/A.

Copyright ©2012 Richtek Technology Corporation. All rights reserved.	is a registered trademark of Richtek Technology Corporation.
www.richtek.com	DS8010/A-09 September 2012

Richtek RT8010-10GQW, RT8010-10PQV, RT8010-10PQW, RT8010-12GQW, RT8010-12PQV, RT8010-12PQW, RT8010-15GQW, RT8010-15PQV, RT8010-15PQW, RT8010-16PQW, RT8010-18GQW, RT8010-18PQV, RT8010-18PQW, RT8010-25GQW, RT8010-25PQV, RT8010-25PQW, RT8010-33GQW, RT8010-33PQV, RT8010-33PQW, RT8010AGQW, RT8010APQW, RT8010GQW, RT8010PQV, RT8010PQW Schematic

RT8010/A

Functional Pin Description

Pin No.		Pin Name	Pin Function
RT8010	RT8010A	Pin Name	Pin Function
RT8010	RT8010A
1	6, 8, 16	IC	Internal Connection. Leave floating and do not make connection
1	6, 8, 16	IC	to this pin.
			to this pin.
2	7	EN	Chip Enable (Active High).

3	9, 10, 11, 12	VIN	Power Input. (Pin 9 and Pin 10 must be connected with Pin 11).

4	13, 14, 15	LX	Pin for Switching. (Pin 13 must be connected with Pin 14).

5	1, 2, 3, 5	GND	Ground.

6	4	FB/VOUT	Feedback/Output Voltage.

7 (Exposed Pad)	17 (Exposed Pad)	GND	Ground. The exposed pad must be soldered to a large PCB and
7 (Exposed Pad)	17 (Exposed Pad)	GND	connected to GND for maximum thermal dissipation.
			connected to GND for maximum thermal dissipation.

Function Block Diagram

		EN			VIN
		OSC &			RS1
		OSC &	Current
		Shutdown	Current
		Shutdown	Limit
		Control	Limit
	Slope	Control	Detector
			Detector

	Compensation	Current
		Current
		Sense
			Control	Driver	LX
		PWM	Logic
		PWM
FB/VOUT	Error	Comparator
	Amplifier
	RC
	COMP	UVLO &			RS2
	COMP	Power Good
		Power Good
		Detector	VREF
			VREF
				GND

Copyright ©2012 Richtek Technology Corporation. All rights reserved.	is a registered trademark of Richtek Technology Corporation.
DS8010/A-09 September 2012	www.richtek.com

RT8010/A

Absolute Maximum Ratings

(Note 1)

Supply Input Voltage -------------------------------------------------------------------------------------------------

6.5V

EN, FB Pin Voltage --------------------------------------------------------------------------------------------------

−0.3V to VIN

LX Pin Switch Voltage -----------------------------------------------------------------------------------------------

−0.3V to (VIN + 0.3V)

<20ns -------------------------------------------------------------------------------------------------------------------

−4.5V to 7.5V

LX Pin Switch Current -----------------------------------------------------------------------------------------------

Power Dissipation, PD @ TA = 25°C

WDFN-6L 2x2 ---------------------------------------------------------------------------------------------------------

0.833W

WQFN-16L 3x3

-------------------------------------------------------------------------------------------------------

1.47W

Package Thermal Resistance

(Note 2)

WDFN-6L 2x2, θJA ----------------------------------------------------------------------------------------------------

120°C/W

WDFN-6L 2x2, θJC ---------------------------------------------------------------------------------------------------

20°C/W

WQFN-16L 3x3, θJA --------------------------------------------------------------------------------------------------

68°C/W

WQFN-16L 3x3, θJC -------------------------------------------------------------------------------------------------

7.5°C/W

Lead Temperature (Soldering, 10 sec.) --------------------------------------------------------------------------

260°C

Storage Temperature Range ---------------------------------------------------------------------------------------

−65°C to 150°C

Junction Temperature ------------------------------------------------------------------------------------------------

150°C

ESD Susceptibility (Note 3)

HBM (Human Body Model) -----------------------------------------------------------------------------------------

2kV

Recommended Operating Conditions

(Note 4)

Supply Input Voltage -------------------------------------------------------------------------------------------------

2.5V to 5.5V

Junction Temperature Range ---------------------------------------------------------------------------------------

−40°C to 125°C

Ambient Temperature Range ---------------------------------------------------------------------------------------

−40°C to 85°C

Electrical Characteristics

(VIN = 3.6V, VOUT = 2.5V, L = 2.2μH, CIN = 4.7μF, COUT = 10μF, TA = 25°C, IMAX = 1A unless otherwise specified)

Parameter

Symbol

Test Conditions

Min

Typ

Max

Unit

Input Voltage Range

VIN

2.5

5.5

Quiescent Current

IOUT = 0mA, VFB = VREF + 5%

μA

Shutdown Current

ISHDN

EN = GND

0.1

μA

Reference Voltage

VREF

For Adjustable Output Voltage

0.588

0.6

0.612

Adjustable Output Range

VOUT

(Note 5)

VREF

VIN − 0.2V

VOUT

VIN = 2.5V to 5.5V, VOUT = 1V

−3

0A < IOUT < 1A

VOUT

VIN = 2.5V to 5.5V, VOUT = 1.2V

−3

0A < IOUT < 1A

Output Voltage

Fix

VOUT

VIN = 2.5V to 5.5V, VOUT = 1.5V

−3

Accuracy

0A < IOUT < 1A

VOUT

VIN = 2.5V to 5.5V, VOUT = 1.6V

−3

0A < IOUT < 1A

VOUT

VIN = 2.5V to 5.5V, VOUT = 1.8V

−3

0A < IOUT < 1A

is a registered trademark of Richtek Technology Corporation.

www.richtek.com

DS8010/A-09 September

2012

RT8010/A

Parameter		Symbol	Test Conditions			Min		Typ	Max	Unit

		VOUT	VIN = VOUT + V to 5.5V		(Note 6)	−3		--	3
		VOUT	VOUT = 2.5V, 0A < IOUT < 1A			−3		--	3
	Fix		VOUT = 2.5V, 0A < IOUT < 1A							%
Output Voltage	Fix	VOUT	VIN = VOUT + V to 5.5V		(Note 6)	−3		--	3	%
Output Voltage			VIN = VOUT + V to 5.5V		(Note 6)
Accuracy			VOUT = 3.3V, 0A < IOUT < 1A
Accuracy			VOUT = 3.3V, 0A < IOUT < 1A
	Adjustable	VOUT	VIN = VOUT + V to 5.5V		(Note 6)	−3		--	3	%
			0A < IOUT < 1A
FB Input Current		IFB	VFB = VIN			−50		--	50	nA

P-MOSFET RON		RDS(ON)_P	IOUT = 200mA	VIN = 3.6V		--		0.28	--	Ω
P-MOSFET RON		RDS(ON)_P	IOUT = 200mA	VIN = 2.5V		--		0.38	--	Ω
				VIN = 2.5V		--		0.38	--
N-MOSFET RON		RDS(ON)_N	IOUT = 200mA	VIN = 3.6V		--		0.25	--	Ω
N-MOSFET RON		RDS(ON)_N	IOUT = 200mA	VIN = 2.5V		--		0.35	--	Ω
				VIN = 2.5V		--		0.35	--
P-Channel Current Limit		ILIM_P	VIN = 2.5V to 5.5 V			1.4		1.5	--	A
EN High-Level Input Voltage		VEN_H	VIN = 2.5V to 5.5V			1.5		--	--	V
EN Low-Level Input Voltage		VEN_L	VIN = 2.5V to 5.5V			--		--	0.4	V
EN Low-Level Input Voltage		VEN_L	VIN = 2.5V to 5.5V			--		--	0.4

Under Voltage Lock Out threshold		UVLO				--		1.8	--	V

Hysteresis						--		0.1	--	V

Oscillator Frequency		fOSC	VIN = 3.6V, IOUT = 100mA			1.2		1.5	1.8	MHz

Thermal Shutdown Temperature		TSD				--		160	--	°C
Max. Duty Cycle						100		--	--	%

LX Leakage Current			VIN = 3.6V, VLX = 0V or VLX = 3.6V			−	1	--	1	μ
			VIN = 3.6V, VLX = 0V or VLX = 3.6V				1			A

Note 1. Stresses beyond those listed “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 in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions may affect device reliability.

Note 2. θJA is measured at TA = 25°C on a high effective thermal conductivity four-layer test board per JEDEC 51-7. θJC is measured at the exposed pad of the package.

Note 3. Devices are ESD sensitive. Handling precaution recommended.

Note 4. The device is not guaranteed to function outside its operating conditions. Note 5. Guarantee by design.

Note 6. V = IOUT x PRDS(ON)

Copyright ©2012 Richtek Technology Corporation. All rights reserved.	is a registered trademark of Richtek Technology Corporation.
DS8010/A-09 September 2012	www.richtek.com
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