1、 Ver: 0.1 Aug 05, 2013 TEL: 886-3-5788833http:/.tw1 G5177BGlobal Mixed-mode TechnologySync. Rectifier Step Up Converter Features Up to 90% Efficiency at Iout=2A VOUT = 5V from 3.3V Input Low 70A Quiescent Current Guaranteed 3A Output Current at VOUT= 5V from 3.3V Input 1MHz PWM Switching Frequency S
2、ynchronous and Embedded Power Mosfets; No Schottky Diode Required Internal Soft-Start to Limit Inrush Current Adjustable Output Output turn off true shutdown function Current Mode Operation with Internal Com-pensation for Excellent Line and Load Tran-sient Response Overload/Short-Circuit Protection
3、with hiccup control Shutdown Current 100mA) VBAT=2.54.5 4.925 5 5.075 V Input Quiescent current IBATVBAT=3.6 FB=1.28 No load, no switching (exclude input current from ILM01) - 50 70 A Shutdown supply current IBAT(ILM01=0 in SOP-8) - 0.1 1 A Oscillator&Protection Switching Frequency Fosc 0.7 1.0 1.3
4、MHzSoft-Start Interval SS 4 5 6 ms FB Regulation Voltage VFB1.208 1.227 1.246 V FB Input Current IFBFB=1.0V - - 100 nA T_scp_restart Restart time in SCP - 80 - ms short-Circuit Response Time T_short_response VOUT VOUTX25%, - Tosc - s Current Limit Response Time T_oc_response - Tosc - s Maximum Duty
5、Cycle DmaxFB=0.95V 86 93 96 % DC-DC Switches VOUT Leakage Current IPVOUT_LK(ILM01=0 in SOP-8) VOUT=5V - 1 5 A LX Leakage Current ILX_LK(ILM01=0 in SOP-8) VOUT=5V - 1 5 A RON-N - 39 55Switch ON Resistance RON-P - 42 60mPeak Current Limit I_LIM ILM01=1 6.5 - - A Efficiency ILM01=1 VBAT=3V, VOUT=5V, IO
6、UT=2A - 87 - % Ver: 0.1 Aug 05, 2013 TEL: 886-3-5788833http:/.tw3 G5177BGlobal Mixed-mode TechnologyElectrical Characteristics (Continued) PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITSProtection Block VOUT Short-Circuit Threshold VSCPFalling Edge - VOUT(1- 0.27) - V VOUT Short-Circuit Threshold VSCP
7、Ring Edge - VOUT(1- 0.19) - V VBAT UVLO Threshold VUVLOFalling Edge 1.7 1.9 2.2 V VBAT UVLO Threshold VUVLORling Edge 2 2.2 2.5 V Thermal Shutdown Threshold Rising Edge, 20C hysteresis - 150 - C Control Block ILM01 Input High Level Vih_ilm 1.5 - 5.5 V ILM01 Input Low Level Vil_ilm 0 - 0.5 V ILIM01 I
8、nternal Pull-Low Resis-tance Rin_ilm 200 250 300 K *note1:If ILM01 connect to Vbat, It will consume current I_ilm01=Vbat/250k Ver: 0.1 Aug 05, 2013 TEL: 886-3-5788833http:/.tw4 G5177BGlobal Mixed-mode TechnologyTypical performance Characteristics (VIN=2.5V4.2V, VOUT=5V, CIN=47F, COUT=47F +22F, L=2.2
9、H, TA= 25C) IL1A/divIL 200mA/divLX 2V/divLX 2V/divVOUT50mV/divVOUT50mV/divLX 2V/divLX 2V/divVIN2V/div VIN 2V/divVIN2V/divVIN2V/divVIN2V/divVIN2V/divLX 2V/divIL1A/divVOUT50mV/divVOUT50mV/divVOUT50mV/divVOUT50mV/divIL1A/divIL1A/divIL1A/divLX 2V/divTime 1s/divTime 1ms/divTime 1s/divTime 1s/divTime 10ms
10、/div Time 1s/divVIN=3V, IOUT=0AVIN,VOUT, ILwaveformVIN=3.5V, IOUT=0AVIN,VOUT, ILWaveformVIN,VOUT, ILWaveformVIN=4.5V, IOUT=0AVIN,VOUT, ILWaveformVIN=3V, IOUT=1AVIN=3.5V, IOUT=1AVIN,VOUT, ILWaveformVIN=4.5V, IOUT=1AVIN,VOUT, ILWaveformVer: 0.1 Aug 05, 2013 TEL: 886-3-5788833http:/.tw5 G5177BGlobal Mi
11、xed-mode TechnologyTypical Performance Characteristics (continued) Time 5ms/divTime 5ms/divTime 5ms/divIL1A/divIL5A/div IL 2A/divLX 5V/divLX 5V/divVOUT5V/divVOUT5V/divILIM 2V/divILIM 2V/divLX 5V/div LX 5V/divIL 2A/divILVOUT5V/divVOUT5V/divTime 50ms/divTime 50ms/divTime 5ms/divIL1A/divLX 5V/divVOUT5V
12、/divILIM 2V/divILIM 2V/divStart Up WaveformVIN=2.5VVOUT5V/divLX 5V/divIL1A/divVIN=2.5VILIM 2V/divVOUT5V/divLX 5V/divTime 5ms/div1.5A load start up & shutdown quicklyShort Circuit WaveformVIN=2.5VVIN=4.2VStart Up WaveformStart Up WaveformVIN=4.2VStart Up Waveform2A load start up & shutdown quicklyno
13、load start up & shutdown quickly no load start up & shutdown quicklyVIN=4.2VShort Circuit WaveformVer: 0.1 Aug 05, 2013 TEL: 886-3-5788833http:/.tw6 G5177BGlobal Mixed-mode TechnologyTypical Performance Characteristics (continued) IOUT1A/divLX 5V/div LX 5V/divVOUT200mV/divVOUT200mV/divLX 5V/div LX 5
14、V/divTime 50s/divTime 50s/divTime 50s/divIOUT 1A/divTime 50s/divVOUT200mV/div VOUT 200mV/divIOUT1A/divIOUT1A/divTime 50s/div Time 100s/divLX 5V/divLX 5V/divIL2A/divIL2A/divVOUT2V/divVOUT2V/div200mA 1.5A Load Transient WaveformVIN=2.5V, CFB=NCVIN=2.5V, CFB=10pF200mA 1.5A Load Transient WaveformVIN=2.
15、5VOver Current & Under Voltage Waveform200mA 1.5A Load Transient WaveformVIN=4.2V, CFB=NCVIN=4.2V, CFB=10pF200mA 1.5A Load Transient WaveformVIN=4.2VOver Current & Under Voltage WaveformVer: 0.1 Aug 05, 2013 TEL: 886-3-5788833http:/.tw7 G5177BGlobal Mixed-mode TechnologyTypical Performance Character
16、istics (continued) Minimum Footprint PCB Layout Section SOP-8 (FD)0100200300400500600700800900100010 100 1000 10000Load Current (mA)Switching frequency(KHz)VOUT=5V，L=2.2H，COUT=47F+22FVIN=4.2VVIN=2.5VVIN=3.5VVIN=3V203040506070809010010 100 1000 10000Load Current (mA)Efficiency(%)VIN=4.2VVOUT=5V，L=2.2
17、H，COUT=47F+22FVIN=2.5VVIN=3VVIN=3.5VEfficiency VS. Load CurrentSwitching Frequency VS. Load CurrentVer: 0.1 Aug 05, 2013 TEL: 886-3-5788833http:/.tw8 G5177BGlobal Mixed-mode TechnologyPin Description For SOP-8 (FD) PIN NAME FUNCTION 1,2 LX Inductor Node. 3 VBAT IC Power Supply Input. 4 ILIM01 Output
18、 Current Limit Setting, and On/Off Control. 5 GND IC Analog Ground. 6 FB Converter Feedback Input. 7,8 VOUT Converter Output. EP Exposed Paddle. Connect to the ground plane to optimize thermal performance. EP is internally connected to GND. EP must be connected to GND at a single point with a star g
19、round connection. Block Diagram (For SOP-8 (FD) FBGNDVOUTLXILM01Synchronous RectifiedCurrent Mode Step-UpOn-Chip MOSFETs+-1.227VBandgap OSC OTPVBATBody-diode controlFunction Description The G5177B current-mode step-up DC-DC switching converter uses a fixed-frequency PWM architecture with output shut
20、down. In light-load mode, the con-verter switches when needed, consuming only 70A of quiescent current. In heavy-load mode of higher than 100mA, the converter switches every cycle at a con-stant frequency as fixed-PWM, thus enabling noise filtering. The G5177B is highly efficient, with internal and
21、synchronous switches. Shutdown reduces the quiescent current to less than 0.1A. Low quiescent current and high efficiency make this device ideal for portable equipment. The G5177B step-up DC-DC switching converter typi-cally generates a 5V output voltage from a single-cell battery input voltage. The
22、 minimum output peak cur-rent limit is 6.5A in SOP8-FD package. When an over-current, short-circuit or thermal shutdown condi-tion is encountered. The converter will turn off until the over-current or over-temperature condition is removed, and during the state of short-circuit after precharge is end
23、, the converter will turn off 64ms first and then turn on 1ms cycle by cycle to protect con-verter under short circuit operation. Internal soft-start limits the inrush current to less than 500mA under no-load conditions during startup. The G5177B is adjustable by 2 external resistors with calculatin
24、g the value for R1 as R1 = R2 (VOUT/VFB - 1). The G5177B switches at a 1MHz frequency, allowing for tiny external components. The G5177B is opti-mized for use in iPad-like computers, smart phones, portable handheld devices and other applications re-quiring low quiescent current for maximum battery l
25、ife.Ver: 0.1 Aug 05, 2013 TEL: 886-3-5788833http:/.tw9 G5177BGlobal Mixed-mode TechnologyPackage Information SOP- 8 (FD) Package Taping Specification GMT Inc. does not assume any responsibility for use of any circuitry described, no circuit patent licenses are implied and GMT Inc. reserves the right at any time without notice to change said circuitry and specifications. PACKAGE QTY/REEL SOP-8 (FD) 2,500 ea
