FP5137B Technology 1 CHANNEL SYNCHRONOUS PWM CONTROL IC GENERAL DESCRIPTION The FP5137B is a synchronous buck switching regulator control IC for DC-DC applications field. The FP5137B includes a totem-pole high/low side stage for driving NMOS, high precision reference (0.8V) for comparing output voltage with feedback amplifier, an internal 200KHz oscillator and programmable soft start function. FEATURES ˙Feedback Reference Voltage: 0.8V (2%) ˙Peak Output Source/Drive Capability: 500mA ˙Internal 200KHz Oscillator SOP8 ˙Programmable Soft Start function (SS) ˙Short Circuit Protection function(SCP) ˙Internal UVLO function ˙Package: PDIP8/SOP8 TYPICAL APPLICATION ˙VGA Card PDIP8 ˙High Efficiency DC-DC Converter ˙Battery Charger VIN Vc c Vc H D rv SS VO U T FP 5137B LD rv C omp G nd Website: http://www.feeling-tech.com.tw FB Rev0.2 Sept. 22, 2006 P1/FP5137B FP5137B Technology FUNCTIONAL BLOCK DIAGRAM 3V Vcc Bias Generator 0.2V 1.25V POR 3V 4.0V Vc 20uA 0. 2V 3.5V SS 8 64uA Max POR Ct Emor Comp Emor Amp VC 5 HDrv 2 VCC 3 LDrv 4 GND Oscillator 0.8V 25K 6 S Q R FB Reset Dom 25K 1 0.4V FbLo Comp COMP 7 POR MARK VIEW PIN DESCRIPTION 1 8 2 7 6 - FP5137B 3 4 L Website: http://www.feeling-tech.com.tw 5 Name No. FB 1 VCC 2 LDRV 3 GND 4 HDRV 5 VC 6 COMP 7 SS 8 I/O I P O P O P O I Description Error amplifier inverting input pin IC power supply Low Side NMOS Driver IC ground High Side NMOS Driver A supply voltage for High Side Driver Error amplifier compensation output To connect a capacitor for Soft-start Rev0.2 Sept. 22, 2006 P2/FP5137B FP5137B Technology ORDER INFORMATION Part Number FP5137BP-LF FP5137BD-LF FP5137BDR-LF Operating Temperature -10°C ~ +85°C -10°C ~ +85°C -10°C ~ +85°C Package PDIP8 SOP8 SOP8 Description Tube Tube Tape & Reel IC DATE CODE DISTINGUISH FP5137B - L Lead Free Lot Number Mass Production Version Per Half Month Year FOR EXAMPLE: January February March A (Front Half Month), B (Last Half Month) C, D E, F ------------And so on Lot Number is the last two numbers For Example: A3311C 62 Lot Number Website: http://www.feeling-tech.com.tw Rev0.2 Sept. 22, 2006 P3/FP5137B FP5137B Technology ABSOLUTE MAXIMUM RATINGS Power supply voltage (VCC) ---------------------------------------------------------------- +25V Power supply voltage (VC) ----------------------------------------------------------------- +30V Output source current ----------------------------------------------------------------------- -500mA Output sink current --------------------------------------------------------------------------- +500mA Junction Temperature (Tj) ------------------------------------------------------------------- +150℃ Allowable dissipation PDIP8 Ta≦+25℃ ---------------------------------------------------------- 800mW SOP8 Ta≦+25℃ ----------------------------------------------------------- 650mW TJA ----------------------------------------------------------------------------------- 130℃/W TJC ----------------------------------------------------------------------------------- 38.8℃/W Thermal Resistance SOP8 Operating temperature ----------------------------------------------------------------------- -10℃∼+85℃ Storage temperature ------------------------------------------------------------------------- -55℃∼+125℃ Operating Junction Temperature Range------------------------------------------------- +0°C∼125°C PDIP8 Lead Temperature (soldering, 20 sec) ---------------------------------------- +260℃ SOP8 Lead Temperature (soldering, 10 sec) ----------------------------------------- +260℃ 260℃ / 10 sec 260℃ -1.2℃ / sec +0.23℃ / sec 210℃ 180℃ +3.4℃ / sec 25℃ 15s 60s 190s 280s Lead Free Soldering Curve Website: http://www.feeling-tech.com.tw Rev0.2 Sept. 22, 2006 P4/FP5137B FP5137B Technology DC ELECTRICAL CHARACTERISTICS Under Voltage Lock-Out section (U.V.L.O.) PARAMETER SYMBOL TEST CONDITIONS MIN TYP MAX UNIT UVLO threshold voltage VCC (UVLO) Sweep up VCC 4.0 4.2 4.4 V Hysteresis voltage VCC (HYS) UVLO threshold voltage VC (UVLO) Hysteresis voltage VC (HYS) UVLO threshold voltage VFB (UVLO) Hysteresis voltage VFB (HYS) 0.25 Sweep up VC 3.1 3.3 V 3.5 V 0.25 Sweep down FB 0.3 0.4 V 0.5 V 0.1 V Soft Start section (S.S.) PARAMETER SYMBOL TEST CONDITIONS MIN TYP MAX UNIT ISS VSS= 0V -10 -20 -30 μA SYMBOL TEST CONDITIONS MIN TYP MAX UNIT 180 200 220 KHz 10 % Input source current Oscillator section PARAMETER Oscillation frequency f Frequency change with ∆f / ∆V VCC=5V to 25V 2 ∆f / ∆T Ta = -10℃to 85℃ 5 SYMBOL TEST CONDITIONS MIN TYP MAX UNIT Maximum duty cycle TDUTY (ON) VFB=1.0V 85 90 95 % Minimum duty cycle TDUTY (OFF) VFB=1.5V 0 0 voltage Frequency change with temperature % Period Adjustment section PARAMETER Website: http://www.feeling-tech.com.tw Rev0.2 Sept. 22, 2006 P5/FP5137B % FP5137B Technology DC ELECTRICAL CHARACTERISTICS (Cont.) Total Device section PARAMETER SYMBOL TEST CONDITIONS MIN TYP MAX UNIT Dynamic VCC supply current ICC (DYN) CL=1500pF 2 5 8 mA ICCQ VSS=0V 1 3.3 6 mA IC (DYN) CL=1500pF 2 7 10 mA ICQ VSS=0V 0.5 1 4.5 mA SYMBOL TEST CONDITIONS TYP MAX UNIT 0.8 0.816 V 20 mV Static VCC supply current Dynamic VC supply current Static VC supply current Error Amplifier section PARAMETER MIN Input threshold voltage VFB VFB change with voltage ∆VFB / ∆V VCC=5V to 25V 5 VT change with temperature ∆VFB / ∆T Ta = -10℃to 85℃ 1 % IFB1 VSS=3V, VFB=1V -0.1 µA IFB2 VSS=0V, VFB=1V -64 µA gm -- SYMBOL TEST CONDITIONS HDrv output high voltage VOH1 VFB=0.6V,IO=-200mA 2 V LDrv output high voltage VOH2 VFB=1.0V,IO=-200mA 2 V HDrv output low voltage VOL1 VFB=1.0V,IO=200mA 1.8 V LDrv output low voltage VOL2 VFB=0.6V,IO=200mA 1.8 V Rise time Tr CL=1500pF 50 100 ns Fall time Tf CL=1500pF 50 100 ns 100 150 ns Input bias current Transconductance 0.784 450 600 750 μmho TYP MAX UNIT Output section PARAMETER Dead band time Website: http://www.feeling-tech.com.tw Tdb MIN 50 Rev0.2 Sept. 22, 2006 P6/FP5137B FP5137B Technology TYPICAL CHARACTERISTICS POWER SUPPLY VOLTAGE VS SUPPLY CURRENT 10 16 TA=25℃ Vc=12V 8 TA=25℃ Vcc=5V 14 7 12 CLOAD=1500pF 6 Vc-Supply Current-mA Vcc-Supply Current-mA POWER SUPPLY VOLTAGE VS SUPPLY CURRENT CLOAD=1000pF CLOAD=470pF 5 4 10 CLOAD=1000pF 6 3 4 2 2 0 CLOAD=1500pF 8 CLOAD=470pF 0 0 2 4 6 8 10 12 14 16 18 20 2 4 6 8 10 Figure 1 22 220 210 Output Frequency-Kilo Hertz Volts-Output Voltage-V VS AMBIENT TEMPERATURE 4 2 Vcc=5V Vc=12V FB=0.8V 200 190 180 170 0 - 40 - 25 0 25 50 75 160 - 40 100 - 25 TA - Ambient Temperature - ℃ 0 25 50 75 100 TA - Ambient Temperature - ℃ Figure 3 Figure 4 Output Maximum Duty Cycle Output Rise and Fall Time VS VS AMBIENT TEMPERATURE AMBIENT TEMPERATURE 93% 100 Vcc=5V Vc=12V FB=0.8V Vcc=5V Vc=12V FB=0.8V CL=1500pF 90 89% Output Rise and Fall Time-ns Output Maximum Duty Cycle-% 20 Output Frequency 6 87% 85% 83% 81% 80 Rise Time 70 60 Fall Time 50 40 79% 30 77% 20 75% - 40 18 VS 8 91% 16 AMBIENT TEMPERATURE VCC=5V VC=12V FB=0.8V 10 14 Figure 2 Output Voltage 12 12 Vc- Power Supply Voltage - V Vcc - Power Supply Voltage - V 10 - 25 0 25 50 75 100 - 40 - 25 0 25 50 TA - Ambient Temperature - ℃ TA - Ambient Temperature - ℃ Figure 5 Figure 6 Website: http://www.feeling-tech.com.tw 75 100 Rev0.2 Sept. 22, 2006 P7/FP5137B FP5137B Technology DETAILED DESCRIPTION Voltage reference A 3.0V regulator operating from VCC is used to power the internal circuitry of the FP5137B. An internal resistive divider provides 0.8V reference for the error amplifier, Soft-start (typ. 1.5V) and SCP (typ. 0.5V) circuits. Error amplifier The error amplifier compares a sample of the dc-dc converter output voltage to the 0.8V reference and generates an error signal for the error comparator. Output voltage of dc-dc converter is setting with the resistor divider using the following expression (see figure 7): R1 Vout = 1 + ∗ 0.8 R2 VOUT R1 Error Amplifier 1 R2 0.8V FP5137B 7 R3 C1 Figure 7. Error Amplifier with Feedback resistance divider Oscillator The fixed frequency generates from an internal RC oscillator, and the typical value is 200KHz. Under voltage lockout (UVLO) FP5137B has a different under voltage lockout point for VCC (typ. 4.2V) and VC (typ. 3.3V). The converter is normal operation when supply voltage rises above the point of lockout; otherwise the output drivers of FP5137B are off. Website: http://www.feeling-tech.com.tw Rev0.2 Sept. 22, 2006 P8/FP5137B FP5137B Technology Soft Start When the VCC and VC of FP5137B are ready, the power on reset (POR) signal is enable. The internal current source (typ. 20µA) will charge the external capacitor connected soft-start pin and another internal current source (max. 64µA) will control feedback voltage of error amplifier and enable output driver for soft-start function. The soft-start timing can be decided by following expression: tss = 75 ∗ Css( ms ) FP5137B should be shutdown whenever it is forced a voltage under 0.5V at soft-start pin. Short-circuit protection FP5137B should be shutdown immediately whenever output voltage under 0.4V, the mean is hard to maintain the output voltage during maximum duty cycle under short-circuit, and the PWM output are off until short circuit problem is release. Output transistor and boost voltage VC FP5137B uses two NMOS and their turn-on VGS voltage near 4.5V, the source voltage of high side NMOS is near VIN, and it is necessary to supply a boost voltage higher than VIN for high side NMOS gate drive, the following figure explains the relation of MOS gate to source voltage. Application circuits can use different method to solve the boost power supply VC for high side driver. (Recommend boost voltage VC is sum of VIN and VGS) VIN VC D HDrv G S Vgs>4.5V High Side MOS current + VCC ~VIN LDrv FP5137 Figure 8. IC Output Stage with NMOS Website: http://www.feeling-tech.com.tw Rev0.2 Sept. 22, 2006 P9/FP5137B FP5137B Technology BASIC APPLICATION NOTE (Dual Power Supply) +5V +12V U1 1 FB 2 3 C8 104 4 SS VCC COMP LDrv VC GND HDrv L2 8 7 2.2uH 6 R3 100K 5 FP5137B + C7 C6 C5 1uF 680pF 104 C2 220uF + C1 100uF Q1 L1 +1.2V 15uH + Q2 D1 C4 220uF + C3 220uF R2 R1 10K 1% 20K 1% Figure 9. FP5137B DC/DC Converter circuit using dual power supply Application Description This is a simple application circuit using dual power supply (+5V and +12V), the converting voltage is from +5V to +1.2V, and +12V connects with VC pin makes sure the high side NMOS can be turn-on. The output voltage determines from the following formula: R2 10 K Vout = 1 + ∗ VREF = 1 + ∗ 0.8V = 1.20V R1 20 K The soft-start time determines from the following formula: TSS = 75 ∗ C 5 = 75 ∗ 0.1(ms) = 7.5ms Website: http://www.feeling-tech.com.tw Rev0.2 Sept. 22, 2006 P10/FP5137B FP5137B Technology BASIC APPLICATION NOTE (Single Power Supply) +5V L2 D3 D2 2.2uH D4 + U1 1 2 3 C9 104 4 FB SS VCC COMP LDrv VC GND HDrv FP5137B C2 220uF + C1 100uF 8 7 6 R3 100K 5 C8 C7 C6 1uF 680pF 104 C5 104 Q1 L1 +1.2V 15uH Q2 D1 + C4 220uF + C3 220uF R2 R1 10K 1% 20K 1% Figure 10. FP5137B DC/DC Converter circuit using single power supply Application Description This application circuit is same as dual power supply but VC pin uses a charge-pump circuit with D2~D4 and C5, C8. The C5 capacitor would charge near +5V through D3 when +5V power supply is turn-on, the voltage of VC is a sum of C5 voltage and VIN-VDIODE voltage, is higher than Q1 source terminal during Q1 turns on. Website: http://www.feeling-tech.com.tw Rev0.2 Sept. 22, 2006 P11/FP5137B FP5137B Technology PACKAGE OUTLINE SOP8 0.16typ 0.015X45 H E 0.008typ. 0.050typ θ° D A L A1 SEATING PLANE 0.004max SYMBOLS MIN MAX A 0.053 0.069 A1 0.004 0.010 D 0.189 0.196 E 0.150 0.157 H 0.228 0.244 L 0.016 0.050 θ° 0 8 NOTE: 1. JEDEC OUTLINE:MS-012 AA 2. DIMENSIONS “D” DOES NOT INCLUDE MOLD FLASH,PROTRUSIONS OR GATE BURRS.MOLD FLASH,PROTRUSIONS AND GATE BURRS SHALL NOT EXCEED .15mm (.0.06in) PER SIDE 3. DIMENSIONS “E” DOES NOT INCLUDE INTER-LEAD FLASH,OR PROTRUSIONS. INTER-LEAD FLASH AND PROTRUSIONS SHALL NOT EXCEED .25mm (.0.10in) PER SIDE. Website: http://www.feeling-tech.com.tw Rev0.2 Sept. 22, 2006 P12/FP5137B FP5137B Technology PDIP 8 SYMBOLS MIN NOR MAX A - - 0.210 A1 0.015 - - A2 0.125 0.130 0.135 D 0.355 0.365 0.400 E 0.300BSC E1 0.245 0.250 0.255 L 0.115 0.130 0.150 eΘ 0.335 0.355 0.375 θ° 0 7 15 NOTE: 1.“D””E1”DIMENSIONS DO NOT INCLUDE MOLD FLASH OR PROTRUSIONS SHALL NOT EXCEED .010 INCH 2.eB IS MEASURED AT THE LEAD TIPS WITH THE LEADS UNCONSTRAINED 3.POINTED OR ROUNDED LEAD TIPS ARE PREFERRED TO EASE INSERTIDN 4.DISTANCE BETWEEN LEADSINCLUDING DAM BAR PROTRUSIONS TO BE .005 INCH MININUM 5.DATUM PLANE H CONINCIDENT WITH THE BOTTOM OF LEAD, WHERE LEAD EXITS BODY. Website: http://www.feeling-tech.com.tw Rev0.2 Sept. 22, 2006 P13/FP5137B FP5137B Technology PACKING SPECIFICATIONS BOX DIMENSION TUBE INSIDE BOX AND CARTON 100mm FTC Logo 220mm FTC Logo 630mm BOX LABEL 640mm BOX LABEL 190mm 380mm INSIDE BOX TUBE CARTON TAPE AND REEL INSIDE BOX AND CARTON 380mm 362mm 365mm FTC label 230mm 342mm 50mm CARTON LABEL FTC Logo Tape & Reel Carton PACKING QUANTITY SPECIFICATIONS SOP8 PDIP8 SOP8 100 EA/TUBE 50 EA/TUBE 2500 EA / REEL 100 TUBES / INSIDE BOX 4 INSIDE BOXES / CARTON 4 INSIDE BOXES / CARTON LABEL SPECIFICATIONS Tapping & Reel Feeling Technology Corp. Product FP5137BDR-LF Lot No A3311C62 4Xx-XXL D/C Q'ty ◎∼◎ 無鉛 Lead Free Website: http://www.feeling-tech.com.tw Rev0.2 Sept. 22, 2006 P14/FP5137B FP5137B Technology CARTON Feeling Technology Corp. Product Type: FP5137BDR-LF Lot No: A3311C62 Date Code: 4Xx-XXL Package Type: SOP-8L Marking Type: Laser 無鉛 Lead Free 10,000 Total Q'ty: CARRIER TAPE DIMENSIONS APPLICATION SOP8 W 12.0 +0.3 -0.1 P E F D D1 8.0±0.1 1.75±0.1 5.5±0.1 1.55±0.1 1.5+0.25 APPLICATION P0 P1 AD B0 K0 t SOP8 4.0±0.1 2.0±0.1 6.4±0.1 5.20±0.1 2.1±0.10 0.30±0.013 Website: http://www.feeling-tech.com.tw Rev0.2 Sept. 22, 2006 P15/FP5137B FP5137B Technology REEL DIMENISIONS APPLICATION SOP8 MATERIAL PLASTIC REEL (WHILE) A B C D T1 T2 330±0.1 62±1.5 12.75+0.15 2+0.6 12.4+0.2 2.0+0.2 Website: http://www.feeling-tech.com.tw Rev0.2 Sept. 22, 2006 P16/FP5137B