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APW7078 Dataheets PDF



Part Number APW7078
Manufacturers Anpec Electronics Coropration
Logo Anpec Electronics Coropration
Description Single PWM Switching Controller
Datasheet APW7078 DatasheetAPW7078 Datasheet (PDF)

APW7078 Single PWM Switching Controller Features • • • www.DataSheet4U.com • • • • • • 2.3 to 5.5V Input Voltage Range Adjustable Frequency: Maximum 1MHZ Incorporates Soft-start Function Built-in Short-circuit Detection Circuit (SCP) Low Operating Current: Maximum to 1mA Low Shutdown Current: Maximum to 1mA Package: MSOP-8, TSSOP-8 Under Voltage Lockout Lead Free Available (RoHS Compliant) General Description The A PW 7078 is a single P W M, s tep-up DC-DC c ont roller wit h low operating volt.

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APW7078 Single PWM Switching Controller Features • • • www.DataSheet4U.com • • • • • • 2.3 to 5.5V Input Voltage Range Adjustable Frequency: Maximum 1MHZ Incorporates Soft-start Function Built-in Short-circuit Detection Circuit (SCP) Low Operating Current: Maximum to 1mA Low Shutdown Current: Maximum to 1mA Package: MSOP-8, TSSOP-8 Under Voltage Lockout Lead Free Available (RoHS Compliant) General Description The A PW 7078 is a single P W M, s tep-up DC-DC c ont roller wit h low operating volt age applic at ion int egr at ing s oft-st art and short circ uit detect ion function. And the oscillator switching frequency on chip can be operated by terminating OSC pin to connect c apac itor and resis t or for adjus t able operating frequency. Soft-start is adjusted with external capacitor, whic h s et s t he input current ramp. Bes ides, the external compensation FB pin will apply the flexibility in the dynamic loop status, which allow using small, low equivalent series res istance (ES R) c eramic output capacitors. Applications • • • • LCD Display Power Source Camcorders VCRs, MP3 and Digital Still Camera Hand-held and Communication Instruments PDAs Pinouts INV SCP VDD CTL 1 2 3 4 8 7 6 5 FB OSC GND OUT Ordering and Marking Information APW7078 Lead Free Code Handling Code Temp. Range Package Code APW7078 X : APW7078 O : APW7078 XXX XX APW7078 XXXXX APW7078 Package Code X : MSOP - 8 O : TSSOP-8 Temp. Range I : -40 to 85 °C Handling Code TU : Tube TR : Tape & Reel Lead Free Code L : Lead Free Device Blank : Original Device XXXXX - Date Code XXXXX - Date Code No tes : ANPEC lea d-free produ cts co nta in mol din g comp oun ds/die attach m ate ria ls and 10 0% matte in pla te te rmin atio n fi nish ; wh ich are full y compl iant with Ro HS and compa tibl e wi th both SnPb an d le ad-free sold ieri ng op era tio ns. AN PEC le ad-free produ cts me et or exceed th e l ead -free req uireme nts of IPC /JEDEC J STD -02 0C fo r MSL classi ficati on at lea d-fre e p eak re flo w temp era ture. ANPEC reserves the right to make changes to improve reliability or manufacturability without notice, and advise customers to obtain the latest version of relevant information to verify before placing orders. C opyright © ANPEC Electronics C orp. Rev. A.3 - Nov., 2005 1 www.anpec.com.tw APW7078 Block Diagram VDD OSC UVLO 0.9 V 0.16V 0.1 V Sawtooth wave oscillator VDD www.DataSheet4U.com INV VDD + Error Amp. + + + DTC 0.8V PWM Comp. Output drive circuit OUT Vref 0.5V FB Soft start SCP GND SCP CTL Absolute Maximum Ratings Symbol VDD VIO TA TJ T STG TS Supply Voltage Input / Output Pins Operating Ambient Temperature Range Junction Temperature Range Storage Temperature Range Soldering Temperature Parameter Value -0.3 to 7 -0.3 to 7 -40 to 85 -40 to 150 -65 to +150 300, 10 seconds Unit V V °C °C °C °C Recommended Operating Condition Symbol VDD VINV VCTL C SCP RT CT FSW Supply Voltage Error Amplifier Invert Input Voltage Control Pin Input Voltage SCP Pin Capacitor Timing Resistance Timing Capacitor Oscillator Frequency 2 Parameter Value Min. 2.3 -0.2 -0.2 1.0 100 200 Typ. 0.1 3.3 600 Max. 5.5 1 VDD 10 270 1000 Unit V V V µF KΩ pF KHz C opyright © ANPEC Electronics C orp. Rev. A.3 - Nov., 2005 www.anpec.com.tw APW7078 Electrical Characteristics Symbol Entire Device VDD IDD www.DataSheet4U.com ISD Dmax Supply Voltage Supply Current Shutdown Current Maximum Duty Cycle VDD Startup Threshold Voltage Hysteresis voltage Voltage at Soft-Start completion Soft-Start Charge Current Vscp=0V VDD=2.3V to 5.5V CTL pin open or VDD Rt=3.3K, Ct=270pF 80 2.3 0.7 0.1 85 5.5 1 1 92 V mA µA % Parameter (TA = 25°C, VDD = 3.3V, unless otherwise specified) Test Conditions APW7078 Min Typ Max Unit Under Voltage Lockout Protection VTH VR 1.9 2.0 1.8 2.1 1.9 V V Soft-Start Vss Ics 0.7 -0.7 0.8 -1.0 0.9 -1.5 V µA Short Circuit Protection(SCP) Vscp Iscp Fosc Fdv Fdt Threshold Voltage Charge Current Oscillator Frequency Frequency Stability for Voltage Vscp=0V Rt=3.3KΩ, Ct=270pF VDD=2.3V to 5.5V Ta=-40°C to 85°C 0.7 -0.7 500 0.8 -1.0 600 2 5 0.9 -1.5 700 5 V µA KHz % % Sawtooth waveform oscillator(OSC) Frequency Stability for Temperature Error Amplifier Vref Reference Voltage VFB=INV VDD=2.3V to 5.5V Ta=-40°C to 85°C 0.49 0.5 5 1 0.51 20 V mV % Vref/dV Vref stability Vref variation with Vref/dT Temperature gm Transconductance IB VOH VOL Input Bias Current Output Voltage Range Output Source Current Output Sink Current 1000 INV=0V INV=0V,FB=0.5V INV=1V,FB=0.5V -150 140 1.6 1300 1600 1 µA/V µA V V µA µA 1.8 0.01 -180 170 -210 200 C opyright © ANPEC Electronics C orp. Rev. A.3 - Nov., 2005 3 www.anpec.com.tw APW7078 Electrical Characteristics (Cont.) (TA = 25°C, VDD = 3.3V, unless otherwise specified) Symbol Parameter Test Conditions APW7078 Min -150 150 Typ -200 200 0.2V DD 0.8VDD Max Unit PWM Controller Driver ISOURCE Output Source Current www.DataSheet4U.com ISINK Duty<5%, OUT=0V Duty>5%, OUT=5V Active mode Swit.


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