Texas Instruments TPS61020DRC, TPS61024DRC, TPS61025DRC, TPS61026DRC, TPS61027DRC Schematic [ru]

TPS61020,	TPS61024,	TPS61025
TPS61026,	TPS61027, TPS61028

	(3,25 mm x 3,25 mm)	TPS61029
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		SLVS451D – SEPTEMBER 2003 – REVISED FEBRUARY 2006

96% EFFICIENT SYNCHRONOUS BOOST CONVERTER

FEATURES

∙96% Efficient Synchronous Boost Converter

∙Output Voltage Remains Regulated When Input Voltage Exceeds Nominal Output Voltage

∙Device Quiescent Current: 25 µA (Typ)

∙Input Voltage Range: 0.9 V to 6.5 V

∙Fixed and Adjustable Output Voltage Options Up to 5.5 V

∙Power Save Mode for Improved Efficiency at Low Output Power

∙Low Battery Comparator

∙Low EMI-Converter (Integrated Antiringing Switch)

∙Load Disconnect During Shutdown

∙Over-Temperature Protection

∙Small 3 mm × 3 mm QFN-10 Package

APPLICATIONS

∙All One-Cell, Two-Cell and Three-Cell Alkaline, NiCd or NiMH or Single-Cell Li Battery Powered Products

∙Portable Audio Players

∙PDAs

∙Cellular Phones

∙Personal Medical Products

∙Camera White LED Flash Light

DESCRIPTION

The TPS6102x devices provide a power supply solution for products powered by either a one-cell, two-cell, or three-cell alkaline, NiCd or NiMH, or one-cell Li-Ion or Li-polymer battery. Output currents can go as high as 200 mA while using a single-cell alkaline, and discharge it down to 0.9 V. It can also be used for generating 5 V at 500 mA from a 3.3-V rail or a Li-Ion battery. The boost converter is based on a fixed frequency, pulse-width-modulation (PWM) controller using a synchronous rectifier to obtain maximum efficiency. At low load currents the converter enters the Power Save mode to maintain a high efficiency over a wide load current range. The Power Save mode can be disabled, forcing the converter to operate at a fixed switching frequency. The maximum peak current in the boost switch is limited to a value of 800 mA, 1500 mA or 1800mA depending on the device version.

The TPS6102x devices keep the output voltage regulated even when the input voltage exceeds the nominal output voltage. The output voltage can be programmed by an external resistor divider, or is fixed internally on the chip. The converter can be disabled to minimize battery drain. During shutdown, the load is completely disconnected from the battery. A low-EMI mode is implemented to reduce ringing and, in effect, lower radiated electromagnetic energy when the converter enters the discontinuous conduction mode. The device is packaged in a 10-pin QFN PowerPAD™ package measuring 3 mm x 3 mm (DRC).

		L1
		6.8 μH	SW	VOUT
					C2			C3
			VBAT
				R3	2.2	μ	F	47	μ
									F
0.9-V To	C1	R1	EN	FB
6.5-V Input	10 μF		LBI	R4					R5
		R2
			PS	LBO
			GND	PGND
				TPS61020

VO

3.3 V Up To

200 mA

Low Battery

Output

Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.

PowerPAD is a trademark of Texas Instruments.

PRODUCTION DATA information is current as of publication date.	Copyright © 2003–2006, Texas Instruments Incorporated
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.

TPS61020, TPS61024, TPS61025

TPS61026, TPS61027, TPS61028

TPS61029

www.ti.com

SLVS451D – SEPTEMBER 2003 – REVISED FEBRUARY 2006

These devices have limited built-in ESD protection. The leads should be shorted together or the device placed in conductive foam during storage or handling to prevent electrostatic damage to the MOS gates.

AVAILABLE OUTPUT VOLTAGE OPTIONS(1)

	OUTPUT	NOMINAL SWITCH	PACKAGE		PART NUMBER(2)
T	VOLTAGE			PACKAGE
A	DC/DC	CURRENT LIMIT	MARKING
	Adjustable	1500 mA	BDR		TPS61020DRC
	Adjustable	800 mA	BNE		TPS61028DRC
	Adjustable	1800 mA	BRF		TPS61029DRC
–40°C to 85°C	3.0 V	1500 mA	BDS	10-Pin QFN	TPS61024DRC
	3.3 V	1500 mA	BDT		TPS61025DRC
	5 V	1800 mA	BRD		TPS61026DRC
	5 V	1500 mA	BDU		TPS61027DRC

(1)Contact the factory to check availability of other fixed output voltage versions.

(2)The DRC package is available taped and reeled. Add R suffix to device type (e.g., TPS61020DRCR) to order quantities of 3000 devices per reel. Add a T suffix to the device type (i.e., TPS61020DRCT) to order quantities of 250 devices per reel.

ABSOLUTE MAXIMUM RATINGS

over operating free-air temperature range (unless otherwise noted)(1)

	TPS6102x
Input voltage range on SW, VOUT, LBO, VBAT, PS, EN, FB, LBI	–0.3 V to 7 V
Operating virtual junction temperature range, TJ	–40°C to 150°C
Storage temperature range, Tstg	–65°C to 150°C

(1)Stresses beyond those listed under 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 under recommended operating conditions is not implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliabilitiy.

DISSIPATION RATINGS TABLE

	PACKAGE	THERMAL RESISTANCE	POWER RATING	DERATING FACTOR ABOVE
		ΘJA	TA≤ 25°C	TA = 25°C
	DRC	48.7°C/W	2054 mW	21 mW/°C

RECOMMENDED OPERATING CONDITIONS

	MIN	NOM MAX	UNIT
Supply voltage at VBAT, VI (TPS61020, TPS61024, TPS61025, TPS61028)	0.9	6.5	V
Supply voltage at VBAT, VI (TPS61026, TPS61029)	0.9	5.5	V
Operating free air temperature range, TA	–40	85	°C
Operating virtual junction temperature range, TJ	–40	125	°C

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TPS61020, TPS61024, TPS61025 TPS61026, TPS61027, TPS61028

TPS61029

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SLVS451D – SEPTEMBER 2003 – REVISED FEBRUARY 2006

ELECTRICAL CHARACTERISTICS

over recommended free-air temperature range and over recommended input voltage range (typical at an ambient temperature range of 25°C) (unless otherwise noted)

DC/DC STAGE

	PARAMETER
	Minimum input voltage for start-up
	Input voltage range, after start-up (TPS61020,
VI	TPS61024, TPS61025, TPS61027, TPS61028)
	Input voltage range, after start-up (TPS61026,
	TPS61029)
VO	TPS61020, TPS61028 and TPS61029 output
	voltage range
VFB	TPS61020, TPS61028 and TPS61029 feedback
	voltage
f	Oscillator frequency
ISW	Switch current limit (TPS61020, TPS61024,
	TPS61025, TPS61027)
ISW	Switch current limit (TPS61028)
ISW	Switch current limit (TPS61026, TPS61029)
	Start-up current limit
	SWN switch on resistance
	SWP switch on resistance
	Total accuracy (including line and load regulation)
	Line regulation
	Load regulation
	VBAT
	Quiescent current
	VOUT
	Shutdown current
CONTROL STAGE
	PARAMETER
VUVLO	Under voltage lockout threshold
VIL	LBI voltage threshold
	LBI input hysteresis
	LBI input current
VOL	LBO output low voltage
Vlkg	LBO output leakage current
VIL	EN, PS input low voltage
VIH	EN, PS input high voltage
	EN, PS input current
	Overtemperature protection
	Overtemperature hysteresis

TEST CONDITIONS	MIN	TYP	MAX	UNIT
RL = 120 Ω		0.9	1.2	V
	0.9		6.5	V
	0.9		5.5	V
	1.8		5.5	V
	490	500	510	mV
	480	600	720	kHz
VOUT= 3.3 V	1200	1500	1800	mA
VOUT= 3.3 V		800		mA
VOUT= 3.3 V	1500	1800	2100	mA
		0.4 x ISW		mA
VOUT= 3.3 V		260		mΩ
VOUT= 3.3 V		290		mΩ
			±3%
			0.6%
			0.6%
IO = 0 mA, VEN = VBAT = 1.2 V,		1	3	µA
VOUT = 3.3 V, TA = 25°C		25	45	µA
VEN = 0 V, VBAT = 1.2 V,		0.1	1	µA
TA = 25°C

TEST CONDITIONS	MIN	TYP	MAX	UNIT
VLBI voltage decreasing		0.8		V
VLBI voltage decreasing	490	500	510	mV
		10		mV
EN = VBAT or GND		0.01	0.1	µA
VO = 3.3 V, IOI = 100 µA		0.04	0.4	V
VLBO = 7 V		0.01	0.1	µA
			0.2 × VBAT	V
	0.8 × VBAT			V
Clamped on GND or VBAT		0.01	0.1	µA
		140		°C
		20		°C

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TPS61020, TPS61024, TPS61025

TPS61026, TPS61027, TPS61028

TPS61029

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SLVS451D – SEPTEMBER 2003 – REVISED FEBRUARY 2006

PIN ASSIGNMENTS

	DRC PACKAGE
	(TOP VIEW)
EN	PGND
VOUT	SW
FB	PS
LBO	LBI
GND	VBAT

				Terminal Functions
	TERMINAL		I/O	DESCRIPTION
	NAME	NO.
	EN	1	I	Enable input. (1/VBAT enabled, 0/GND disabled)
	FB	3	I	Voltage feedback of adjustable versions
	GND	5		Control / logic ground
	LBI	7	I	Low battery comparator input (comparator enabled with EN), may not be left floating, should be connected to
				GND or VBAT if comparator is not used
	LBO	4	O	Low battery comparator output (open drain)
	PS	8	I	Enable/disable power save mode (1/VBAT disabled, 0/GND enabled)
	SW	9	I	Boost and rectifying switch input
	PGND	10		Power ground
	VBAT	6	I	Supply voltage
	VOUT	2	O	Boost converter output
	PowerPAD™			Must be soldered to achieve appropriate power dissipation. Should be connected to PGND.

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TPS61020, TPS61024, TPS61025 TPS61026, TPS61027, TPS61028

TPS61029

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SLVS451D – SEPTEMBER 2003 – REVISED FEBRUARY 2006

FUNCTIONAL BLOCK DIAGRAM (TPS61020, TPS61028, TPS61029)

			SW
			Backgate
VBAT	Anti-		Control
	Ringing				VOUT
VOUT				10 kΩ
	Vmax	Gate			20 pF
	Control	Control			PGND
			PGND
			Error		PGND
	Regulator		Amplifier	_	FB
				+
					+
				Vref = 0.5 V	_
	Control Logic			GND
			Oscillator
			Temperature
EN			Control
PS
GND
	Low Battery				LDO
	Comparator
LBI	_
	+
+	Vref = 0.5 V
_
	GND

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TPS61020, TPS61024, TPS61025

TPS61026, TPS61027, TPS61028

TPS61029

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SLVS451D – SEPTEMBER 2003 – REVISED FEBRUARY 2006

PARAMETER MEASUREMENT INFORMATION

		L1
		6.8 μH	SW	VOUT
					C2			C3
			VBAT
				R3	2.2	μ	F	47	μ
									F
Power	C1	R1	EN	FB
Supply	10 μF		LBI	R4					R5
		R2
			PS	LBO
List of Components:			GND	PGND
				TPS6102x
U1 = TPS6102xDRC
L1 = EPCOS B82462−G4682
C1, C2 = X7R/X5R Ceramic
C3 = Low ESR Tantalum

VCC

Boost Output

Control Output

TYPICAL CHARACTERISTICS

Table of Graphs

			FIGURE
	Maximum output current	vs Input voltage	1
		vs Output current (TPS61020)	2
		vs Output current (TPS61025)	3
	Efficiency	vs Output current (TPS61027)	4
		vs Input voltage (TPS61025)	5
		vs Input voltage (TPS61027)	6
	Output voltage	vs Output current (TPS61025)	7
		vs Output current (TPS61027)	8
	No load supply current into VBAT	vs Input voltage	9
	No load supply current into VOUT	vs Input voltage	10
		Output voltage in continuous mode (TPS61025)	11
		Output voltage in continuous mode (TPS61027)	12
		Output voltage in power save mode (TPS61025)	13
		Output voltage in power save mode (TPS61027)	14
	Waveforms	Load transient response (TPS61025)	15
		Load transient response (TPS61027)	16
		Line transient response (TPS61025)	17
		Line transient response (TPS61027)	18
		Start-up after enable (TPS61025)	19
		Start-up after enable (TPS61027)	20

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TPS61020, TPS61024, TPS61025 TPS61026, TPS61027, TPS61028

TPS61029

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	SLVS451D – SEPTEMBER 2003 – REVISED FEBRUARY 2006
MAXIMUM OUTPUT CURRENT	TPS61020
vs	EFFICIENCY
INPUT VOLTAGE	vs
	OUTPUT CURRENT

	1400								100
									90	VBAT = 0.9 V		VO = 1.8 V
	1200
- mA		VO = 3.3 V				VO = 5 V			80
	1000								70
Current
										VBAT = 1.8 V
	800							- %	60
Maximum Output								Efficiency	50
	600								40
	400			VO = 1.8 V					30
									20
	200
									10
	0								0
	0.9	1.7	2.5	3.3	4.1	4.9	5.7	6.5
									1	10	100	1000
			VI - Input Voltage - V
										IO - Output Current - mA
				Figure 1.						Figure 2.

TPS61025	TPS61027
EFFICIENCY	EFFICIENCY
vs	vs
OUTPUT CURRENT	OUTPUT CURRENT

	100				100
	90				90
	80	VBAT = 2.4 V			80
						VBAT = 1.2 V
	70		VBAT = 1.8 V		70		VBAT = 2.4 V
%	60			%	60	VBAT = 1.8 V		VBAT = 3.6 V
-				-
Efficiency	50		VBAT = 0.9 V	Efficiency	50
	40				40
	30				30
	20				20
	10			VO = 3.3 V	10			VO = 5 V
	0	10	100	1000	0	10		100	1000
	1				1
		IO - Output Current - mA				IO - Output Current - mA
			Figure 3.				Figure 4.

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TPS61020, TPS61024, TPS61025

TPS61026, TPS61027, TPS61028

TPS61029

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SLVS451D – SEPTEMBER 2003 – REVISED FEBRUARY 2006
TPS61025	TPS61027
EFFICIENCY	EFFICIENCY
vs	vs
INPUT VOLTAGE	INPUT VOLTAGE

	100
	95	IO = 100 mA					VO = 3.3 V
	90
	85
%	80		IO = 10 mA
-
Efficiency	75
	70	IO = 250 mA
	65
	60
	55
	50
	0.9	1.4	1.9	2.4	2.9	3.4	3.9	4.4	4.9
			VI - Input Voltage - V

	100
	95	IO = 100 mA
	90
	85
%	80				IO = 10 mA
-
Efficiency	75	IO = 250 mA
	70
	65
	60
	55								VO = 5 V
	50
	0.9	1.4	1.9	2.4	2.9	3.4	3.9	4.4	4.9	5.4	5.9	6.4
				VI - Input Voltage - V

Figure 5.	Figure 6.
TPS61025	TPS61027
OUTPUT VOLTAGE	OUTPUT VOLTAGE
vs	vs
OUTPUT CURRENT	OUTPUT CURRENT

	3.35				5.10
		VO = 3.3 V
					5.05
- V	3.30			- V	5
Voltage				Voltage
		VBAT = 2.4 V
					4.95
- Output				- Output
	3.25				4.90
O				O
V				V
					4.85
	3.20				4.80
	1	10	100	1000
		IO - Output Current - mA

	VO = 5 V
		VBAT = 3.6 V
1	10	100	1000
	IO - Output Current - mA

Figure 7.

Figure 8.

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NO LOAD SUPPLY CURRENT INTO VBAT vs

INPUT VOLTAGE

	1.6
μ A						TA = 85°C
	1.4
-
VBAT	1.2
Into	1
Current	0.8								TA = -40°C
						TA = 25°C
Supply	0.6
No Load	0.4
	0.2
	0
	0.9	1.5	2	2.5	3	3.5	4	4.5	5	5.5	6	6.5
				VI - Input Voltage - V

Figure 9.

TPS61025

OUTPUT VOLTAGE IN CONTINUOUS MODE

	VI = 1.2 V,
VoltageOutput	RL = 33 Ω,
	mV/div20
	VO = 3.3 V
Inductor Current	200 mA/div

t - Time - 1 μs/div

Figure 11.

TPS61020, TPS61024, TPS61025

TPS61026, TPS61027, TPS61028

TPS61029

SLVS451D – SEPTEMBER 2003 – REVISED FEBRUARY 2006

NO LOAD SUPPLY CURRENT INTO VOUT vs

INPUT VOLTAGE

	34.8								TA = 85°C
- μA
	29.8
VOUT	24.8		TA = -40°C
Into
									TA = 25°C
Current	19.8
Supply	14.8
	9.8
No Load
	4.8
	-0.2
	0.9	1.5	2	2.5	3	3.5	4	4.5	5	5.5	6	6.5
				VI - Input Voltage - V

Figure 10.

TPS61027

OUTPUT VOLTAGE IN CONTINUOUS MODE

Output Voltage	20 mV/div
Inductor Current	200 mA/div	VI = 3.6 V,
		RL = 25 Ω,
		VO = 5 V

t - Time - 1 μs/div

Figure 12.

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