5V/50mA Noise Inductorless Boost Converter General Description

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5V/50mA Noise Inductorless Boost Converter General Description

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AS1301
5V/50mA Noise Inductorless Boost Converter
General Description
AS1301 50mA inductorless boost converter using double H-bridge charge-pump topology with external flying capacitors. AS1301 runs 1MHz fixed frequency utilized with noise regulation scheme allow usage together with sensitive circuitry from same battery supply. Designed reside portable space limited equipment 1MHz charge pump converts 5.25V input regulated output with accuracy. shutdown function reduces supply current <5µA disconnects load from output. integrated soft-start circuitry prevents current spikes being drawn from battery during start-up. AS1301 available TDFN (3x3x0.8mm) 10-pin WL-CSP 8-bumps packages.
Features
Efficiency 5.25V Input Voltage Regulated Output Automatic Mode Up-Switching <5µA Shutdown Current Tolerant Enable Signal 50mA Load Current Overload Protection Output Disconnected During Shutdown Soft-Start Inductor Required Small External Components Required (COUT 2.2µF, CFLY 220nF) Noise Fixed Frequency 1MHz Charge Pump: Battery Feed Through Mode Single Phase Mode Dual Phase Mode Package Options: TDFN (3x3x0.8mm) 10-pin WL-CSP 8-bumps with 0.5mm pitch
Applications
device ideal three cells single Li-Ion battery cell conversion, mobile phones, portable instruments, microprocessor based systems remote data-acquisition systems.
Figure Typical Application Diagram
CFLY1 VBATT C1CFLY2 C2VOUT COUT 2.2µF
VBATT CBAT 2.2µF
VOUT
AS1301
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AS1301 Data Sheet
Assignments
Assignments
Figure Assignments (Through View)
VOUT VBATT VOUT
VBATT C2C1-
TDFN (3x3x0.8mm) 10-pin
WL-CSP 8-bumps
Descriptions
Table Descriptions Name VOUT C2VBATT C1GND TDFN Pinout Pinout Description Connector Positive terminal flying Output Voltage. This must bypassed with 2.2µF ceramic capacitor. Connected left floating. Connected left floating. Connected left floating. Enable. (operating this digital input logic high normal operation. shutdown, logic low. Connector Positive terminal flying Connector Negative terminal flying +2.7V 5.25V Input Voltage. Bypass this with 2.2µF ceramic capacitor. Connector Negative terminal flying Ground. Exposed
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AS1301 Data Sheet
Absolute Maximum Ratings
Absolute Maximum Ratings
Stresses beyond those listed Table cause permanent damage device. These stress ratings only, functional operation device these other conditions beyond those indicated Section Electrical Characteristics page implied. Exposure absolute maximum rating conditions extended periods affect device reliability. Table Absolute Maximum Ratings Parameter pins Operating Temperature Range Storage Temperature Range -0.3 +7.0 +125 Units MIL-Std. 883E 3015.7 methods reflow peak soldering temperature (body temperature) specified accordance with IPC/JEDEC J-STD020C "Moisture/Reflow Sensitivity Classification Non-Hermetic Solid State Surface Mount Devices". lead finish Pb-free leaded packages matte (100% Sn). Notes
Package Body Temperature
+260
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AS1301 Data Sheet
Electrical Characteristics
Electrical Characteristics
5.25V, VOUT COUT CBAT 2.2µF, CFLY1 CFLY2 =220nF, TAMB Typical values TAMB unless otherwise specified. Table Electrical Characteristics Symbol VOFF VBATT VOUT IOUT Vripple tSTART Iinr VO/IO11 VO/IO23 VO/IO12 fOSC tdebup IOP12 IOP23 IOP11 IOFF TOFFL TOFFH Input Levels Input High Level Input Level Parameter Startup Voltage, Rising VBATT Startup Voltage, Falling VBATT Battery Supply Voltage Settled Average Output Voltage Load Current
Conditions
2.865 5.25 5.25
Units mVPP
2.505 VON/ VOFF 4.75 after startup COUT 2.2µF, 50mA load
Output Voltage Ripple Startup Time Inrush Current
Load Regulation Mode Load Regulation Mode Load Regulation Mode Efficiency Switching Mode Efficiency Switching Mode Oscillator Frequency Switching Debounce Time Operating Quiescent Current Operating Quiescent Current Operating Current Mode Shutdown Current Temperature Shutdown Temperature Shutdown
VBATT IOUT 10~50mA VBATT 4.5V, IOUT 10~50mA VBATT 3.1V, IOUT 10~50mA VBATT 3.1V, IOUT 30mA VBATT 3.5V, IOUT 30mA optional selectable
mV/mA
mode without load mode without load without load mode mode
device tested proprietary test mode. inrush current limited internal soft-start circuitry.
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AS1301 Data Sheet
Typical Operating Characteristics
5.25V, VOUT COUT CBAT 2.2µF, CFLY1 CFLY2 =220nF, TAMB unless otherwise specified. Figure Efficiency Input Voltage; ILOAD=10mA
Figure Efficiency Input Voltage; ILOAD=20mA
Efficiency
Efficiency
2.75 3.25 3.75 4.25 4.75 5.25
mode mode mode
2.75 3.25 3.75 4.25 4.75 5.25
mode mode mode
Input Voltage
Input Voltage
Figure Efficiency Input Voltage; ILOAD=30mA
Figure Efficiency vs.Input Voltage; ILOAD=40mA
Efficiency
Efficiency
2.75 3.25 3.75 4.25 4.75 5.25
mode mode mode
2.75 3.25 3.75 4.25 4.75 5.25
mode mode mode
Input Voltage
Input Voltage
Figure Efficiency Input Voltage; ILOAD=50mA
Figure Quiescent Current Input Voltage
Quiescent Current (mA)
mode mode mode
2.25
Efficiency
2.75 3.25 3.75 4.25 4.75 5.25
3.25
4.25
5.25
Input Voltage
Input Voltage
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AS1301 Data Sheet
Figure Output Voltage Output Current
Figure Output Voltage Output Current
Output Voltage
VBATT VBATT 4.5V VBATT
Output Voltage
VBATT 3.5V VBATT
Output Current (mA)
Output Current (mA)
Figure Output Voltage Input Voltage
Figure Output Voltage Temp.; IOUT 0.1mA
5.07
VBATT 3.1V
Output Voltage
2.75
10mA 30mA
50mA
Output Voltage
5.06
VBATT 4.2V VBATT 3.6V
5.05
5.04
3.25
3.75
4.25
4.75
5.25
5.03
Input Voltage
Temperature (°C)
Figure Output Voltage Temp.; IOUT 10mA
5.05 5.04
VBATT 3.1V 10mA 30mA 50mA
Figure Output Voltage Temp.; IOUT 30mA
5.07
3.1V VINVBATT 3.1V 4.2V 3.6V VBATT 4.2V
Output Voltage Output Voltage
Output Voltage
5.03 5.02 5.01 4.99
5.06 5.05
VBATT 4.2V VBATT 3.6V
VBATT 3.6V
5.04 5.03
4.98 2.75 3.25
3.75
4.25
4.75
5.25
Input Voltage Temperature(°C)
Temperature (°C) Temperature (°C)
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AS1301 Data Sheet
Figure Efficiency Output Current;
Figure Efficiency Output Current; 3.3V
Efficiency
Efficiency
mode
mode mode
Output Current (mA)
Output Current (mA)
Figure Efficiency Output Current; 3.5V
Figure Efficiency Output Current;
Efficiency
Efficiency
mode mode
mode mode
Output Current (mA)
Output Current (mA)
Figure Efficiency Output Current; 4.3V
Figure Efficiency Output Current; 4.7V
Efficiency
mode mode
Efficiency
mode
Output Current (mA)
Output Current (mA)
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AS1301 Data Sheet
Figure Load Transient; VBATT 5.2V
Figure Load Transient; VBATT 3.6V
20mA/Div
50µs/Div
50µs/Div
Figure Start-Up Time; VBATT
Figure Start-Up Time; VBATT 5.25V
2V/Div
VOUT
VOUT
5V/Div 100mA/Div
200µs/Div
200µs/Div
Figure Line Transient; VBATT 4.5V 3.5V
VBATT
1kHz RLOAD Duty Cycle 200µs/Div
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100mA/Div
IBATT
1V/Div 50mV/Div
VOUT
Revision 1.03
5V/Div 100mA/Div
IBATT
IBATT
2V/Div
20mA/Div
IOUT
IOUT
100mV/Div
VOUT
50mV/Div
VOUT
AS1301 Data Sheet
Detailed Description
Detailed Description
Operating Principle
Functional Description
AS1301 high efficiency noise switched capacitor DC-DC converter that capable boost operation. equipped with built-in coupled H-bridge type switch configurations. Based value output voltage system automatically initiates mode-switching achieve highest possible efficiency. regulation output voltage achieved regulation loop, which modulates current drive capability power transistors that amount charge transferred from input output each clock cycle controlled equal charge needed load.
Regulation Loop
AS1301 operates constant frequency load. regulation loop power transistors, resistor divider, error amplifier used keep output voltage within allowed limits. error amplifier takes feedback reference signals inputs generates error voltage signal. error voltage controls driver that triggers gate power transistor which modulates current drive capability power transistors. modulated power transistors control charge transferred from input output therefore regulation output voltage realized. Based adjusting amount charge transferred, this regulation concept delivers smallest voltage ripple possible. Figure Functional Block Diagram
CFLY1 CFLY2 C2VOUT COUT Vctrl Temp
Soft Start
VBATT CBAT
Double-H Bridge Topology
State Machine Control Logic
Mode Select
Vmode trig
AS1301
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AS1301 Data Sheet
Detailed Description
Switch Configuration
AS1301 nine built-in power switches shape coupled H-bridge topologies. system features operation modes well operation where input directly connected output. This feedthrough mode suitable input voltages higher than output voltage. operation mode flying capacitors placed series each capacitor charged half input voltage. pumping phase flying capacitors placed parallel. bottom-plates parallel flying capacitors CFLY1 CFLY2 then connected input voltage that voltage top-plates flying capacitors boosted voltage equal VBATT VBATT/2. connecting top-plates capacitors output, output voltage mode half VBATT. top-plate voltage higher than regulation loop adapts power transistor's current drive capability drop some voltage. operation mode runs single-phase operation only. Figure Operating Mode
Charging Phase VOUT VBATT CFLY1 CFLY2 VBATT CFLY1 CFLY2 Pumping Phase VOUT
operation mode just both flying capacitors placed series input voltage, therefore charged input voltage. During pumping phase input voltage connected bottom-plate discharged flying capacitor CFLY. voltage top-plate capacitor boosted 2VBATT. connecting top-plate capacitor output, output charged twice voltage VBATT. top-plate voltage higher than regulation loop limits charge transfer output. collaboration with second flying capacitor this mode features dual-phase operation. Figure Operating Mode
Charging Phase VOUT VBATT CFLY1 CFLY2 VBATT CFLY1 CFLY2 Pumping Phase VOUT
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AS1301 Data Sheet
Detailed Description
Overload Protection
When output voltage drops significantly below battery voltage very high load AS1301 enters into overload protection condition. this condition output connected input current limiting connection. Once overload removed, device enters soft-start period ramps nominal output voltage.
Undervoltage Lockout, UVLO
AS1301 equipped with undervoltage lockout functionality. battery voltage drops below 2.7V (typ) device enters undervoltage lockout condition. device remains this condition until battery voltage high enough enter soft-start period. internal hysteresis 100mV will prevent ringing during startup. input voltage climbs back 2.8V (typ) after such condition, device turns-on automatically.
Shutdown Mode
AS1301 enters low-power shutdown mode when logic low. shutdown charge-pump action halted, output completely disconnected from input VOUT will drop During shutdown output high-Z condition. forced higher voltage then input, because permanent monitoring input- output voltage will prevent erroneous current form output back input during shutdown.
Thermal Shutdown
AS1301 offers thermal shutdown, which prevents eventual damage over-temperature condition. Thermal shutdown will initiated junction temperature exceeds 145°C. temperature drops below this value, thermal shutdown will released automatically device will resume operation.
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AS1301 Data Sheet
Application Information
Application Information
External Component Selection
high internal oscillator frequency 1MHz permits small capacitors both, flying capacitors output capacitors. given load value flying- output capacitors well their affecting output voltage performance. general, capacitor's inversely proportional physical size. Larger capacitances higher voltage ratings tend reduce ESR. function frequency too, must rated devices operating frequency. Another factor affecting capacitor temperature. Note: Many capacitors have huge capacity variation over temperature. This compensated choosing capacitor with better thermal coefficient choosing larger nominal value ensure proper operation over temperature.
Input Output Capacitor Selection
critical which type input bypass capacitor CBAT output filter capacitor COUT used, will affect performance charge pump. capacitors should used minimize VOUT ripple. Multi-layer ceramic capacitors recommended since they have extremely available small footprints.
Input Capacitor
2.2µF input bypass capacitor such tantalum ceramic recommended reduce noise supply transients. During startup mode change supplies part peak input current drawn device.
Output Capacitor
output capacitor charged VOUT voltage during pumping phase. output capacitor introduces steps output voltage waveform whenever charge pump charges COUT. These steps contribute ripple voltage VOUT. Therefore, ceramic tantalum capacitors recommended COUT minimize output voltage ripple. Table Recommended Input Output Capacitor Part Number GRM21BR71A225KA01 2.2µF Code Rated Voltage Dimensions (L/W/T) 2x1.2x1.35mm Manufacturer Murata www.murata.com
Flying Capacitor Selection
ensure required output current avoid high peak currents values flying capacitors CFLY1 CFLY2 very critical. 220nF capacitor sufficient most applications. Dependent operation mode AS1301 alternately charges discharges CFLY1/2. Since flying capacitors lead higher current than output capacitor CFLY1/2 greater impact performance whole system. voltage drop caused flying capacitors directly adds output source resistance charge pump. Therefore capacitors, e.g. tantalum ceramic, recommended flying capacitors well. Table Recommended Flying Capacitor Part Number GRM188R71E224KA88 220nF Code Rated Voltage Dimensions (L/W/T) 1.6x0.8x0.87mm Manufacturer Murata www.murata.com
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AS1301 Data Sheet
Package Drawings Markings
Package Drawings Markings
device available TDFN (3x3x0.8mm) 10-pin WL-CSP 8-bumps package. Figure TDFN (3x3x0.8mm) 10-pin package Diagram
DETAIL
E2/2
INDEX AREA (D/2 xE/2)
(ND-1)
BVIEW
INDEX AREA (D/2 xE/2)
VIEW
Terminal
SIDE VIEW
Datum
TERMINAL SIDE
Table TDFN (3x3x0.8mm) 10-pin package Dimensions Symbol 0.70 0.75 0.80 0.00 0.02 0.05 0.20 0.03 0.15 0.13 0.15 0.10 0.10 0.05 0.08 0.10 Note:
Symbol
Dimensioning tolerancing conform ASME Y14.5M-1994. dimensions millimeters, angle degrees. total number terminals.
D2/2
SEATING PLANE
0.08
3.00 3.00
2.20 1.40 0.30 0.20 0.18
0.40
2.70 1.75 0.50
0.25 0.50
0.30
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AS1301 Data Sheet
Package Drawings Markings
Figure WL-CSP 8-bumps Package Diagram
Seating plane
through view
Bottom view Ball side
typ.
1970
40µm
typ.
310±10 600±30
Notes: Coplanarity dimensions
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AS1301 Data Sheet
Ordering Information
Ordering Information
Table Ordering Information Part AS1301A-BWLT AS1301A-BTDT Marking ASO4 ASO4 Description 5V/50mA Noise Inductorless Boost Converter 5V/50mA Noise Inductorless Boost Converter Delivery Form Package WL-CSP 8-bumps TDFN (3x3x0.8mm) 10-pin
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AS1301 Data Sheet
Ordering Information
Copyrights
Copyright 1997-2008, austriamicrosystems Schloss Premstaetten, 8141 Unterpremstaetten, Austria-Europe. Trademarks Registered rights reserved. material herein reproduced, adapted, merged, translated, stored, used without prior written consent copyright owner. products companies mentioned trademarks registered trademarks their respective companies.
Disclaimer
Devices sold austriamicrosystems covered warranty patent indemnification provisions appearing Term Sale. austriamicrosystems makes warranty, express, statutory, implied, description regarding information forth herein regarding freedom described devices from patent infringement. austriamicrosystems reserves right change specifications prices time without notice. Therefore, prior designing this product into system, necessary check with austriamicrosystems current information. This product intended normal commercial applications. Applications requiring extended temperature range, unusual environmental requirements, high reliability applications, such military, medical life-support life-sustaining equipment specifically recommended without additional processing austriamicrosystems each application. shipments less than parts manufacturing flow might show deviations from standard production flow, such test flow test location. information furnished here austriamicrosystems believed correct accurate. However, austriamicrosystems shall liable recipient third party damages, including limited personal injury, property damage, loss profits, loss use, interruption business indirect, special, incidental consequential damages, kind, connection with arising furnishing, performance technical data herein. obligation liability recipient third party shall arise flow austriamicrosystems rendering technical other services.
Contact Information
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Sales Offices, Distributors Representatives, please visit:
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5V/50mA Noise Inductorless Boost Converter General Description

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