Texas Instruments TPS61006DGST, TPS61006DGSR, TPS61006DGS, TPS61005DGST, TPS61002DGS Datasheet

TPS61000, TPS61001, TPS61002, TPS61003, TPS61004, TPS61005, TPS61006 SINGLE-CELL BOOST CONVERTER WITH START-UP INTO FULL LOAD

SLVS279A ± MARCH 2000 ± REVISED MAY 2000

DStart Up Into a Full Load With Supply Voltages as Low as 0.9 V Over Full Temperature Range

DMinimum 100-mA Output Current From 0.8 V Supply Voltage

DHigh Power Conversion Efficiency, up to 90%

DPower-Save Mode for Improved Efficiency at Low Output Currents

DDevice Quiescent Current Less Than 50 A

DAdded System Security With Integrated Low-Battery Comparator

DLow-EMI Converter (Integrated Antiringing Switch Across Inductor)

DMicro-Size 10-Pin MSOP Package

DEvaluation Modules Available (TPS6100xEVM±156)

DApplications Include:

±Singleand Dual-Cell Battery Operated Products

±MP3-Players and Wireless Headsets

±Pagers and Cordless Phones

±Portable Medical Diagnostic Equipment

±Remote Controls

´

description

The TPS6100x devices are boost converters intended for systems that are typically operated from a singleor dual-cell nickel-cadmium (NiCd), nickel-metal hydride (NiMH), or alkaline battery. The converter output voltage can be adjusted from 1.5 V to a maximum of 3.3 V and provides a minimum output current of 100 mA. The converter starts up into a full load with a supply voltage of 0.9 V and stays in operation with supply voltages as low as 0.8 V.

The converter is based on a fixed-frequency, current-mode pulse-width-modulation (PWM) controller that goes into power-save mode at low load currents. The current through the switch is limited to a maximum of 1100 mA, depending on the output voltage. The current sense is integrated to further minimize external component count. The converter can be disabled to minimize battery drain when the system is put into standby.

A low-EMI mode is implemented to reduce interference and radiated electromagnetic energy that is caused by the ringing of the inductor when the inductor discharge-current decreases to zero. The device is packaged in the space saving 10-pin MSOP package.

		L1	D1		VO = 3.3 V
	33 µH
	Ci	7			Co
	10 µF	SW					3
	6		VOUT	5	22 µF
		VBAT
R1					R3	± V
	9	LBI	LBO	10
R2		TPS61006			Low Battery	Voltage	2
					Warning
	8	NC	FB	3
						± Output
	ON				R4
		EN	COMP		10 kΩ		1
OFF	1			2
						O
		GND				V
		4	C1		C2
			100 pF		33 nF
							0

TYPICAL APPLICATION CIRCUIT FOR FIXED

OUTPUT VOLTAGE OPTION

TPS61006

START UP TIMING INTO 33 Ω LOAD

										140
			VOUT							120
										100	± mA
							IOUT			80
											Current
										60
										40	±Output
											O
										20	I
							EN
										0
0	2	4	6	8	10	12	14	16	18	20
					time ± ms

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.

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

Copyright 2000, Texas Instruments Incorporated

POST OFFICE BOX 655303 •DALLAS, TEXAS 75265

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TPS61000, TPS61001, TPS61002, TPS61003, TPS61004, TPS61005, TPS61006 SINGLE-CELL BOOST CONVERTER WITH START-UP INTO FULL LOAD

SLVS279A ± MARCH 2000 ± REVISED MAY 2000

AVAILABLE OPTIONS

T	PACKAGE	OUTPUT VOLTAGE	PART NUMBER²	MARKING DGS
A		(V)		PACKAGE
		Adj. from 1.5 V to 3.3 V	TPS61000DGS	ADA
		1.5	TPS61001DGS	ADB
		1.8	TPS61002DGS	ADC
± 40°C to 85°C
	10-Pin MSOP DGS	2.5	TPS61003DGS	ADD
		2.8	TPS61004DGS	ADE
		3.0	TPS61005DGS	ADF
		3.3	TPS61006DGS	ADG

²The DGS package is available taped and reeled. Add R suffix to device type (e.g. TPS61000DGSR) to order quantities of 3000 devices per reel.

				Terminal Functions
	TERMINAL		I/O	DESCRIPTION
	NAME	NO.
	COMP	2		Compensation of error amplifier. Connect R-C-C network to set frequency response of control loop. See the
				Application section for more details.
	EN	1	I	Chip-enable input. The converter is switched on if EN is set high and is switched off when EN is connected to ground
				(shutdown mode).
				Feedback input for adjustable output voltage (TPS61000 only). The output voltage is programmed depending on the
	FB	3	I	values of resistors R1 and R2. For the fixed output voltage versions (TPS61001, 2, 3, 4, 5, 6), leave the FB pin
				unconnected.
	GND	4		Ground
				Low-battery detector input. A low-battery signal is generated at the LBO pin when the voltage on LBI drops below the
	LBI	9	I	threshold of 500 mV. Connect LBI to GND or VBAT if the low-battery detector function is not used. Do not leave this
				pin floating.
	LBO	10	O	Open-drain low-battery detector output. This pin is pulled low if the voltage on LBI drops below the threshold of
				500 mV. A pull-up resistor should be connected between LBO and VOUT.
	NC	8		Not connected
	SW	7	I	Switch input pin. The node between inductor and anode of the rectifier diode is connected to this pin.
	VBAT	6	I	Supply pin
	VOUT	5	O	Output voltage. For the fixed output voltage versions, the integrated resistive divider is connected to this pin.

DGS PACKAGE

(TOP VIEW)

EN			1	10		LBO
COMP			2	9		LBI
FB			3	8		NC
GND			4	7		SW
VOUT			5	6		VBAT

2	POST OFFICE BOX 655303 •DALLAS, TEXAS 75265

TPS61000, TPS61001, TPS61002, TPS61003, TPS61004, TPS61005, TPS61006 SINGLE-CELL BOOST CONVERTER WITH START-UP INTO FULL LOAD

SLVS279A ± MARCH 2000 ± REVISED MAY 2000

functional block diagram fixed output-voltage option

	L1	D1
CI	SW	VOUT	CO
	Anti-Ringing
	Comparator
VBAT	and Switch

UVLO

EN

LBI/LBO

Comparator

LBI

Control Logic

Current Sense

Oscillator

Current Limit

Gate Drive

Slope Compensation

VREF	Comparator	Error	Bandgap
LBO			Reference
		Amplifier
	GND	COMP
adjustable output-voltage option
	L1	D1
CI	SW		CO
Anti-Ringing
	Comparator		VOUT
VBAT	and Switch

	UVLO	Control Logic
			Current Sense
	EN	Oscillator
			Current Limit
	LBI/LBO	Gate Drive
			Slope Compensation
	Comparator
	LBI

FB

VREF	Comparator	Error	Bandgap
LBO			Reference
		Amplifier
	GND	COMP

POST OFFICE BOX 655303 •DALLAS, TEXAS 75265

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TPS61000, TPS61001, TPS61002, TPS61003, TPS61004, TPS61005, TPS61006 SINGLE-CELL BOOST CONVERTER WITH START-UP INTO FULL LOAD

SLVS279A ± MARCH 2000 ± REVISED MAY 2000

detailed description

controller circuit

The device is based on a current-mode control topology using a constant-frequency pulse-width modulator to regulate the output voltage. It runs at an oscillator frequency of 500 kHz. The current sense is implemented by measuring the voltage across the switch. The controller also limits the current through the power switch on a pulse by pulse basis. Care must be taken that the inductor saturation current is higher than the current limit of the TPS6100x. This prevents the inductor from going into saturation and therefore protects both device and inductor. The current limit should not become active during normal operating conditions.

The TPS6100x is designed for high efficiency over a wide output current range. Even at light loads the efficiency stays high because the controller enters a power-save mode, minimizing switching losses of the converter. In this mode, the controller only switches if the output voltage trips below a set threshold voltage. It ramps up the output voltage with one or several pulses, and again goes into the power-save mode once the output voltage exceeds the threshold voltage. The controller enters the power-save mode when the output current drops to levels that force the discontinuous current mode. It calculates a minimum duty cycle based on input and output voltage and uses the calculation for the transition out of the power-save mode into continuous current mode.

The control loop must be externally compensated with an R/C/C network connected to the COMP pin. See the application section for more details on the design of the compensation network.

device enable

The device is put into operation when EN is set high. During start-up of the converter the input current from the battery is limited until the voltage on COMP reaches its operating point. The device is put into a shutdown mode when EN is set to GND. In this mode, the regulator stops switching and all internal control circuitry including the low-battery comparator is switched off. The output voltage drops to one diode drop below the input voltage in shutdown.

under-voltage lockout

An under-voltage lockout function prevents the device start-up if the supply voltage on VBAT is lower than approximately 0.7 V. This under-voltage lockout function is implemented in order to prevent the malfunctioning of the converter. When in operation and the battery is being discharged, the device will automatically enter the shutdown mode if the voltage on VBAT drops below approximately 0.7 V.

If the EN pin is hardwired to VBAT and if the voltage at VBAT drops temporarily below the UVLO threshold voltage, the device will switch off and will not start up again automatically, even if the supply voltage rises above 0.9 V. The device will start up again only after a signal change from low to high on EN or if the battery voltage is completely removed.

4	POST OFFICE BOX 655303 •DALLAS, TEXAS 75265

TPS61000, TPS61001, TPS61002, TPS61003, TPS61004, TPS61005, TPS61006 SINGLE-CELL BOOST CONVERTER WITH START-UP INTO FULL LOAD

SLVS279A ± MARCH 2000 ± REVISED MAY 2000

detailed description (continued)

low Battery detector circuit (LBI and LBO)

The low-battery detector circuit is typically used to supervise the battery voltage and to generate an error flag when the battery voltage drops below a user-set threshold voltage. The function is active only when the device is enabled. When the device is disabled, the LBO pin is high impedance. The LBO pin goes active low when the voltage on the LBI pin decreases below the set threshold voltage of 500 mV ± 15 mV, which is equal to the internal reference voltage. The battery voltage, at which the detection circuit switches, can be programmed with a resistive divider connected to the LBI pin. The resistive divider scales down the battery voltage to a voltage level of 500 mV, which is then compared to the LBI threshold voltage. The LBI pin has a build-in hysteresis of 10 mV. Please see the application section for more details about the programming of the LBI threshold.

If the low-battery detection circuit is not used, the LBI pin should be connected to GND (or to VBAT) and the LBO pin can be left unconnected. Do not let the LBI pin float.

low-EMI switch

The device integrates a circuit which removes the ringing that typically appears on the SW-node when the converter enters the discontinuous current mode. In this case, the current through the inductor ramps to zero and the Schottky diode stops conducting. Due to remaining energy that is stored in parasitic components of diode, inductor and switch, a ringing on the SW pin is induced. The integrated anti-ringing switch clamps this voltage internally to VBAT and therefore dampens this ringing.

The anti-ringing switch is turned on by a comparator that monitors the voltage between SW and VOUT. This voltage indicates when the diode is reverse biased. The ringing on the SW-node is damped to a large degree, reducing the electromagnetic interference generated by the switching regulator to a very great extends.

adjustable output voltage

The accuracy of the internal voltage reference, the controller topology, and the accuracy of the external resistor divider determine the accuracy of the adjustable output voltage version of the TPS61000. The reference voltage has an accuracy of ± 4% over line, load, and temperature. The controller switches between fixed frequency and pulse-skip mode, depending on load current. This adds an offset to the output voltage that is equivalent to 1% of VO. Using 1% accurate resistors for the feedback divider, a total accuracy of ± 6% can be achieved over the complete output current range.

POST OFFICE BOX 655303 •DALLAS, TEXAS 75265

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TPS61000, TPS61001, TPS61002, TPS61003, TPS61004, TPS61005, TPS61006 SINGLE-CELL BOOST CONVERTER WITH START-UP INTO FULL LOAD

SLVS279A ± MARCH 2000 ± REVISED MAY 2000

absolute maximum ratings²

Input voltage range, VI (VBAT, VOUT, COMP, FB, LBO, EN, LBI) . . . . . . . . . . . . . . . . . . . . . . . . . ±0.3 V to 3.6 V Input voltage, VI (SW) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±0.3 V to 7 V Peak current into SW . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1300 mA

Continuous total power dissipation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . See dissipation rating table

Operating free-air temperature range, TA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±40°C to 85°C Maximum junction temperature, TJ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 150°C Storage temperature range, Tstg . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±65°C to 150°C Lead temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 260°C

²Stresses beyond those listed under ªabsolute maximum ratingsº 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 ªrecommended operating conditionsº is not implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.

DISSIPATION RATING TABLE

	PACKAGE	TA ≤ 25_C	DERATING FACTOR	TA = 70_C	TA = 85_C
		POWER RATING	ABOVE TA = 25_C	POWER RATING	POWER RATING
	DGS	424 mW	3.4 mW/_C	271 mW	220 mW

recommended operating conditions

		MIN	NOM MAX	UNIT
Supply voltage at VBAT		0.8	VO	V
Output current	VBAT = 1.2 V		100	mA
	VBAT = 2.4 V		250
Inductor		10	33	H
Input capacitor			10	F
Output capacitor			22	F
Operating junction temperature, TJ		±40	125	°C

6	POST OFFICE BOX 655303 •DALLAS, TEXAS 75265

TPS61000, TPS61001, TPS61002, TPS61003, TPS61004, TPS61005, TPS61006 SINGLE-CELL BOOST CONVERTER WITH START-UP INTO FULL LOAD

SLVS279A ± MARCH 2000 ± REVISED MAY 2000

electrical characteristics over recommended operating free-air temperature range, VBAT = 1.2 V, EN = VBAT (unless otherwise noted)

	PARAMETER			TEST CONDITIONS			MIN	TYP	MAX	UNIT
VI	Input voltage for start-up		RL = 33 Ω				0.9			V
VI	Input voltage for start-up		RL = 3 kΩ,			TA = 25 °C	0.8			V
VI	Input voltage once started		IO = 100 mA				0.8			V
VO	Programmable output voltage range	TPS61000	IO = 100 mA				1.5		3.3	V
		TPS61001	1.2	V		IO = 1 mA	1.44	1.5	1.55
			0.8	V < VI < VO,		IO = 100 mA	1.45	1.5	1.55
		TPS61002	1.2	V		IO = 1 mA	1.72	1.8	1.86
			0.8	V < VI < VO,		IO = 100 mA	1.74	1.8	1.86
			1.2	V		IO = 1 mA	2.40	2.5	2.58
		TPS61003	0.8 V < VI < VO,			IO = 100 mA	2.42	2.5	2.58
			1.6	V < VI < VO,		IO = 200 mA	2.42	2.5	2.58
VO	Output voltage		1.2	V		IO = 1 mA	2.68	2.8	2.89	V
		TPS61004	0.8 V < VI < VO,			IO = 100 mA	2.72	2.8	2.89
			1.6	V < VI < VO,		IO = 200 mA	2.72	2.8	2.89
			1.2	V		IO = 1 mA	2.88	3.0	3.1
		TPS61005	0.8 V < VI < VO,			IO = 100 mA	2.9	3.0	3.1
			1.6	V < VI < VO,		IO = 200 mA	2.9	3.0	3.1
			1.2	V		IO = 1 mA	3.16	3.3	3.4
		TPS61006	0.8 V < VI < VO,			IO = 100 mA	3.2	3.3	3.4
			1.6	V < VI < VO,		IO = 200 mA	3.2	3.3	3.4
IO	Maximum continuous output current		VI = 0.8 V				100			mA
			VI = 1.8 V				250
		TPS61001						0.5
		TPS61002						0.65
ISW	Switch current limit	TPS61003	0.8 V < VI < VO					0.9		A
		TPS61004						0.95
		TPS61005						1
		TPS61006						1.1
VFB	Feedback voltage	TPS61006					468	500	515	mV
f	Oscillator frequency						360	500	840	kHz
DMAX	Maximum duty cycle							85%
rDS(on)	Switch-on resistance		VO = 3.3 V					0.18	0.27	Ω
	Line regulation (see Note 1)		VI = 0.8V to 1.25V,			IO = 50 mA		0.3		%/V
	Load regulation fixed output voltage versions		VI = 1.2 V;		IO = 10 mA to 90 mA			0.25%
	(see Note 1)

NOTE 1: Line and load regulation is measured as a percentage deviation from the nominal value (i.e. as percentage deviation from the nominal output voltage). For line regulation, x %/V stands for ± x% change of the nominal output voltage per 1-V change on the input/supply voltage. For load regulation, y% stands for ± y% change of the nominal output voltage per the specified current change.

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