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Details, datasheet, quote on part number:TPS62221DDCT
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| Part: | TPS62221DDCT |
| Category: | Power Management => DC-DC Converters => DC-DC Switching => Switching DC/DC Converters, Integrated Switch |
| Description: | ti TPS62221, 1.5-V Output, 400-mA, 95% Efficient Step-down Converter, 15uA, ThinSOT-23 |
| Company: | Texas Instruments, Inc. |
| Datasheet: | Download TPS62221DDCT datasheet File size : 444 kB |
| Request For quote: | Find where to buy TPS62221DDCT
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Datasheet text preview:
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TPS62220, TPS62221 TPS62222, TPS62224
SLVS491 SEPTEMBER 2003
400 mA, 1.25 MHz HIGH-EFFICIENCY STEP-DOWN CONVERTER IN THIN-SOT23
FEATURES
· · · · · · · · · · · · High Efficiency Synchronous Step-Down Converter With up to 95% Efficiency 2.5 V to 6.0 V Input Voltage Range Adjustable Output Voltage Range From 0.7 V to VI Fixed Output Voltage Options Available Up to 400 mA Output Current 1.25 MHz Fixed Frequency PWM Operation Highest Efficiency Over Wide Load Current Range Due to Power Save Mode 15-µA Typical Quiescent Current Soft Start 100% Duty Cycle Low-Dropout Operation Dynamic Output-Voltage Positioning Available in a thin TSOT23 Package
DESCRIPTION
The TPS6222x devices are a family of high-efficiency synchronous step-down converters ideally suited for portable systems powered by 1-cell Li-Ion or 3-cell NiMH/NiCd batteries. The devices are also suitable to operate from a standard 3.3-V or 5-V voltage rail. With an output voltage range of 6.0 V down to 0.7 V and up to 400 mA output current, the devices are ideal to power low voltage DSPs and processors used in PDAs, pocket PCs, and smart phones. Under nominal load current, the devices operate with a fixed switching frequency of typically 1.25 MHz. At light load currents, the part enters the power save mode operation; the switching frequency is reduced and the quiescent current is typically only 15 µA; therefore it achieves the highest efficiency over the entire load current range. The TPS6222x needs only three small external components. Together with the tiny TSOT23 package, a minimum system solution size can be achieved. An advanced fast response voltage mode control scheme achieves superior line and load regulation with small ceramic input and output capacitors.
APPLICATIONS
· · · · · · · PDAs and Pocket PC Cellular Phones, Smart Phones OMAPTM and Low Power DSP Supply Digital Cameras Portable Media Players Portable Equipment WLAN PC Cards
100 95 TPS62220 VI 2.5 V to 6 V C3 4.7 µF 1 2 3 VI GND EN FB 4 R2 180 k C2 100 pF SW 5 L1 4.7 µH R1 360 k C1 22 pF
C4 10 µF
Efficency - %
VO 1.5 V/400 mA
90 85 80 VI = 2.7 V 75 70 65 60 55 50 45 40 0.01
VO = 1.8 V, L = 4.7 µH, CO = 22 µF
VI = 5 V
VI = 3.7 V
Typical Application (Fixed Output Voltage Version)
0.1 1 10 100 IL - Load Current - mA
1k
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 © 2003, Texas Instruments Incorporated
TPS62220, TPS62221 TPS62222, TPS62224
SLVS491 SEPTEMBER 2003
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ORDERING INFORMATION (1)
TA OUTPUT VOLTAGE Adjustable -40°C to 85°C 1.5 V 1.6 V 1.8 V (1) THIN-SOT23 PACKAGE TPS62220DDC TPS62221DDC TPS62224DDC TPS62222DDC SYMBOL ALN ALO APP ALQ
The DDC package is available in tape and reel. Add R suffix (TPS62220DDCR) to order quantities of 3000 parts. Add T suffix (TPS62220DDCT) to order quantities of 250 parts.
ABSOLUTE MAXIMUM RATINGS
over operating free-air temperature (unless otherwise noted) (1)
UNIT Supply voltage on pin VI (2) Voltages on pins SW, EN, FB (2) Continuous power dissipation, PD Operating junction temperature range, TJ Storage temperature, Tstg Lead temperature (soldering, 10 sec) (1) -0.3 V to 7.0 V -0.3 V to VI +0.3 V See Dissipation Rating Table -40°C to 150°C -65°C to 150°C 260°C
(2)
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 reliability. All voltage values are with respect to network ground terminal.
DISSIPATION RATING TABLE (1)
PACKAGE DDC (1) TA 25°C POWER RATING 400 mW DERATING FACTOR ABOVE TA = 25°C 4 mW/°C TA = 70°C POWER RATING 220 mW TA = 85°C POWER RATING 160 mW
The thermal resistance junction to ambient of the 5-pin Thin-SOT23 is 250°C/W (TBD).
RECOMMENDED OPERATING CONDITIONS
MIN Supply voltage, VI Output voltage range for adjustable output voltage version, VO Output current, IO , TA = 0°C to 85°C Output current, IO , TA = -40°C to 85°C Inductor, L (1) Input capacitor, CI (1) Operating ambient temperature, TA Operating junction temperature, TJ (1) See the application section for further information 40 40 4.7 4.7 85 125 2.5 0.7 NOM MAX 6.0 VI 300 400 UNIT V V mA mA µH µF °C °C
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TPS62220, TPS62221 TPS62222, TPS62224
SLVS491 SEPTEMBER 2003
ELECTRICAL CHARACTERISTICS
VI = 3.6 V, VO = 1.8 V, IO = 200 mA, EN = VIN, TA = -40°C to 85°C, typical values are at TA = + 25°C (unless otherwise noted)
PARAMETER SUPPLY CURRENT VI IQ Input voltage range Operating quiescent current Shutdown supply current Undervoltage lockout threshold ENABLE V(EN) I(EN) EN high level input voltage EN low level input voltage EN input bias current EN = GND or VIN VIN = VGS = 3.6 V VIN = VGS = 2.5 V VIN = VGS = 3.6 V VIN = VGS = 2.5 V VDS = 6.0 V VDS = 6.0 V 2.5 V Vout, 0 V Vsw Vin Vin = open, EN=GND, VSW = 6.0 V 0% -3% 0% -3% 0% -3% 0% -3% 0.26 0.0014 0.1 0.1 1 1 3% 3% 3% 3% 3% 3% 3% 3% %/V %/mA µA µA 0.01 530 670 430 530 0.1 0.1 670 1.25 POWER SWITCH P-channel MOSFET on-resistance rds(ON) N-channel MOSFET on-resistance Ilkg_(P) Ilkg_(N) I(LIM) fS OUTPUT IO IO VO Vref Output current Output current Adjustable output voltage range Reference voltage Feedback voltage, See (1) 400 300 VIN mA mA V V P-channel leakage current N-channel leakage current P-channel current limit Switching frequency 670 850 540 660 1 1 880 1.85 m m µA µA mA MHz 1.3 0.4 0.1 V V µA IO = 0 mA, Device is not switching EN = GND 1.5 2.5 15 0.1 6.0 25 1 2.0 V µA µA V TEST CONDITIONS MIN TYP MAX UNIT
OSCILLATOR
For output voltages 1.2 V a 22 µF output capacitor value is required to achieve a maximum output voltage accuracy of 3% while operating in power save mode (PFM mode)
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