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5. Schematic Diagrams

5-1  Top Level

5-1

Schematic Diagrams

TXPOWER

IRXP

GSMTX1

+3VPLL

+3VMD

_BANDSEL

+3VDEMOD

+3VLNAGSM

+3VLNADCS

TXEN2

RXEN_FEGSM

SYNEN

AFC

DCSTX1

ITX

AFC

VMID

+VBATT

IRXP

DCSTX2

CLK13M

RXEN_FEDCS

STARTUP_VOLTS

+3VLO1

SYNCLK

+3VPLL

STARTUP_VOLTS

DCSTX2

_RESET

TXEN2

+3VTX

DEMODEN

+3VDEMOD

ANT

BANDSEL

QTX

SYNDATA

+3V_RTC

VAGC

ANT

+3VDC

ITX1

QRXP

DCSTX1

POWER_ON

SYNEN

RXEN_FEGSM

+3VLO2

AVCC

POWER_ON

+3VX

SYNCLK

SYNDATA

VMID

+3VDC

GSMTX2

+3VBB

CLK13M

VAGC

QTX1

_BANDSEL

_RESET

+3VLNADCS

+3VLNAGSM

+3VLO1

ITX1

+3VLO2

+3VMD

+3VX

GSMTX1

+VBATT

BANDSEL

ITX

TXPOWER

QRXP

QTX1

TXEN1

TXEN1

QTX

RF_ON_OFF

DEMODEN

RXEN_FEDCS

GSMTX2

+3V_RTC

RF_ON_OFF

+3VTX

+3VBB

AVCC

+VBATT

_RESET

Summary of Contents for SGH-2488

Page 1: ...ellular Phone SGH 2488 2ABC 3DEF 1 5JKL 6MNO GHI 4 8TUV 9WXYZ PQRS 7 0 Manual DUAL BAND Mobile Cellular Phone CONTENTS 1 Exploded Views and Parts List 2 Electrical Parts List 3 Block Diagrams 4 PCB Diagrams 5 Schematic Diagrams ...

Page 2: ...Samsung Electronics Co Ltd Printed in Korea 11 1999 Rev 1 0 GH68 00844A ELECTRONICS ...

Page 3: ...cation Register HLR the Authentication Center AC and the Equipment Identity Register EIR So the system verify that the users and equipment are legal subscriber 1 1 2 Channels Channels used in the E GSM and DCS system can be divided into two classes Logical and Physical channel Physical channels can be described in terms of their frequency and time domain characteristics They are the actual frequen...

Page 4: ...role like a message board and is divided into two control channels PCH Paging Channel and AGCH Access Grant Channel SACCH Slow Associated Control Channel exists every 12 frames controlling and controls the TX power level and timing advance of MS transferring cell information to MS on downlink transferring the information about RX level Quality and RX level of adjacent cell on uplink FACCH Fast Ass...

Page 5: ...ce between the ÒfeedbackÓ signal from the down converter and the ÒreferenceÓ signal from the modulator This error current is filtered by a third order low pass filter to generate an output voltage which depends on the GMSK modulation and the desired channel frequency This voltage controls the transmit VCO such that the VCO output signal centered on the correct RF channel is frequency modulated wit...

Page 6: ...ng Electronics 1 1 1 Exploded Views and Parts List 1 1 Main Exploded View SGH 2488 4 1 1 1 1 6 1 5 3 2 3 4 2 1 2 5 2 3 2 7 2 8 2 4 2 6 2 2 1 7 1 4 6 3 7 8 2 11 12 13 16 5 10 17 14 15 9 1 2 1 3 18 19 3 1 3 3 ...

Page 7: ... GH71 00021A 1 2 5 PMO BATT LOCKER GH72 00147A 1 SNA 2 6 PMO SIM LOCKER GH72 00513A 1 SNA 2 7 RMO EAR COVER GH73 00194A 1 2 8 TAPE MOTOR GH74 00196A 1 SNA 3 KEY PBA GH96 00892A 1 3 1 MIC ASSY GH96 00830A 1 3 2 BUZZER 3002 001104 1 3 3 SPEAKER 3001 001167 1 3 4 REED SWITCH 3409 001003 1 4 PMO KEY PAD GH72 00607C 1 5 LCD ASSY GH96 00891A 1 6 RUBBER BUZZER GH73 00188A 1 7 RUBBER MIC GH73 00189A 1 8 S...

Page 8: ...Exploded Views and Parts List 1 3 Travel Adapter 1 4 Travel Adapter Parts List TYPE SEC CODE REMARK A GH96 01143A CHINA B GH96 01146A EUROPE C GH96 01095A UNITED KINGDOM 1 3 A B C ...

Page 9: ...1 4 1 5 Desk Top Charger SEC CODE GH44 00090B Exploded Views and Parts List 1 9 10 11 6 7 8 2 3 4 5 ...

Page 10: ...6 Desk Top Charger Parts List NO DESCRIPTION SEC CODE Q TY REMARK 1 UPPER CASE 1 2 HANGER SPRING L 1 3 SCREW TAPPING 4 4 HANGER SPRING R 1 5 SCREW TAPPING 3 6 BATT HOUSING 1 7 PCB 1 8 LOWER BASE 1 9 SCREW TAPPING 4 10 BUMPON 4 11 LABEL 1 ...

Page 11: ...Exploded Views and Parts List 1 7 Ciger Light Adapter 1 6 1 8 Ciger Light Adapter Parts List DESCRIPTION SEC CODE REMARK Ciger Light Adapter Code GH44 00040A BLACK ...

Page 12: ...Exploded Views and Parts List 1 7 1 9 Hands Free Kit SEC CODE GH96 00800A Phone Yellow Ignition Micro Phone White Stereo Mute Red Vehicle Battery Black GND ...

Page 13: ...1 8 Exploded Views and Parts List 1 10 Test Jig 1 11 Earphone TEST JIG GH80 10508A DATA CABLE GH39 30532A EARPHONE GH96 00830A ...

Page 14: ...M Q256 Q257 0504 000168 TR Digital NPN 100mW 47K47Kohm SSM Q500 0505 000110 FET SILICON 60V 115mA 200mW U501 U502 0505 001131 FET SILICON 12V 500mA 690mohm Q957 0505 001332 FET SILICON Q600 0506 000173 TR ARRAY NPN 80mW SOT 363 U128 U252 U302 U303 U400 U403 U412 U813 0506 001004 TR ARRAY NPN PNP 50V 100mA LED100 0601 000276 LED CHIP 1 6x2 0mm U902 U903 0801 000022 IC CMOS LOGIC NANDGATE SOP 5P U90...

Page 15: ... TP 1005 R640 2007 000141 R CHIP 2 2Kohm 5 1 16W DA TP 1005 R309 R609 R223 2007 000142 R CHIP 2 7Kohm 5 1 16W DA TP 1005 R351 2007 000143 R CHIP 4 7Kohm 5 1 16W DA TP 1005 R606 R628 2007 000145 R CHIP 6 2Kohm 5 1 16W DA TP 1005 R603 2007 000146 R CHIP 6 8Kohm 5 1 16W DA TP 1005 R106 R107 R152 R205 R210 R255 R232 R235 R238 R253 R256 R363 R418 R419 R605 R630 R637 R906 R907 R952 R962 R963 R984 R985 R...

Page 16: ...3020 R CHIP 4 3Kohm 5 1 16W DA TP 1005 R427 R429 2007 003030 R CHIP 91ohm 5 1 16W DA TP 1005 R407 2007 007001 R CHIP 3 9Kohm 5 1 16W DA TP 1005 R521 2007 007090 R CHIP 11Kohm 5 1 16W DA TP 1005 R510 2007 007095 R CHIP 390ohm 5 1 16W DA TP 1005 R362 2007 007096 R CHIP 160ohm 5 1 16W DA TP 1005 R132 R137 R259 2007 007107 R CHIP 100Kohm 1 1 16W DA TP 1005 R265 2007 007133 R CHIP 300ohm 1 1 16W DA TP ...

Page 17: ...54 C457 C458 C459 C460 2203 000679 C CHIP 27pF 5 50V TP 1005 C510 C511 C520 C530 C632 C633 C639 C128 C136 C609 2203 000725 C CHIP 3 9nF 10 50V TP 1005 C614 2203 000800 C CHIP 33nF 10 25V TP 1608 C302 C306 C319 2203 000812 C CHIP 33pF 5 50V TP 1005 C610 2203 000836 C CHIP 390pF 10 50V TP 1005 C325 2203 000854 C CHIP 39pF 5 50V TP 1005 C304 C357 C810 C819 C862 C867 2203 000940 C CHIP 470pF 10 50V TP...

Page 18: ... TP 1005 C854 C859 C870 C979 C1006 C1007 C464 C871 2404 001083 Cap Tantal 220uF 6 3V 20 TP 7125 C827 2404 001020 Cap Tantal 10uF 6 3V 20 TP 3612 C103 C104 C805 C806 C816 C817 C826 C845 C860 C861 C868 C832 2404 001105 Cap Tantal 10uF 6 3V 20 TP 2012 C873 2404 001152 Cap Tantal 220uF 20 6 3V C953 2404 001162 Cap Tantal 47uF C253 2203 005367 Cap Tantal 6 8uF 20 25V L126 L128 2703 000217 Inductor 470u...

Page 19: ... 942 5MHz F303 F304 2904 001170 Filter SAW 1842 5MHz 75MHz F302 2904 001175 GSM RX SAW U401 2909 001086 ANTENNA SWITCH 942 5MHz 897 5MHz F200 F201 3301 001208 Core Ferrite Bead J100 3709 001121 SIM CONNECTOR 6P 2 54mm SMD S M950 3710 001105 CONNECTOR SOCKET 2P 1 27mm SMD S J176 3710 001302 I F Connetctor 18P 0 5mm J151 3710 001428 BTB Connector 24P 0 5mm J901 3722 001380 Earphone jack 6P U405 4709...

Page 20: ...0mAh Dark Grey SLIM BATTERY 540mAh BLACK STANDARD BATTERY GH43 00143D 750mAh Light Grey STANDARD BATTERY GH43 00143E 750mAh Dark Grey STANDARD BATTERY GH43 00143F 750mAh BLACK EXTENDED BATTERY GH43 00183D 1000mAh Light Grey EXTENDED BATTERY GH43 00183E 1000mAh Dark Grey EXTENDED BATTERY GH43 00183F 1000mAh BLACK DATA KIT GH96 00774A SGH 2400 DATA KIT HFK HANDS FREE KIT EAR PHONE GH96 00830A EAR PH...

Page 21: ...W SAW BPF 246MHz F300 Dip RXLO1DCS 2051 2 2125 8MHz BANDSEL DEMODEN EGSM 1171 2 1216MHz EGSM 493 518MHz DCS 498 519MHz DCS 310 8MHz GSM 295 8MHz DCS 2019 2 2125 8MHz PLLEN TXEN1 QRXP IRXP VMID RXLO3 13MHz TXEN1 DCSTX1 TXEN1 GSMTX2 DCSTX2 GSMPAM U402 GSMTX1 Dip BPF Mod QTX REF 13MHz QTXI ITX ITXI VCO LPF PDF U500 1 5 BPF 1 3 VCO X501 X500 DUAL PLL DUAL VCO VCO X2 Ref Osc BPF U301 RXLO1GSM 1171 2 12...

Page 22: ...B Interface POWER Circuit GSM DCS RF interface Serial Data Interface 3V SIM Card 5V SIM Card Battery Voltage Battery Temperature GSM PLL 3V Tx AVCC RF PSU Multi Switch Array I O Interface A D Interface I O BB Filter PLL GSM DCS VOCODER Memory Charging Circuit Li_lon Battery 3 6V GSM DCS KERNEL 5 DCS PLL GSM Tx DCS Tx GSM PSU DCS PSU ...

Page 23: ... Diagrams 3 3 Travel Adapter EMI FILTER CIRCUIT FIRST RECTIFIRE ISOLATION POWER TRANSFORMER ISOLATION OPTO COUPLER O C P POWER SWITCHING MOS FET FEED BACK P W M CONTROL SECOND RECTIFIRE FILTER AC INPUT DC INPUT ...

Page 24: ... UVLO Overcurrent Protector 2nd Regulator Reference Voltage Overheat Protector Feed Back LED MPU Filter FET Switch INPUT 9V DC FRT 4 1V FET Switch REAR 4 1V Static Current Circuit Static Voltage Circuit Battery Type Detector Charge Voltage Detector Charge Voltage Selector ...

Page 25: ...4 1 PCB Diagrams 4 PCB Diagrams 4 1 Main Top ...

Page 26: ...4 2 4 2 Main Bottom PCB Diagrams ...

Page 27: ...NCLK 3VPLL STARTUP_VOLTS DCSTX2 _RESET TXEN2 3VTX DEMODEN 3VDEMOD ANT BANDSEL QTX SYNDATA 3V_RTC VAGC ANT 3VDC ITX1 QRXP DCSTX1 POWER_ON SYNEN RXEN_FEGSM 3VLO2 AVCC POWER_ON 3VX SYNCLK SYNDATA VMID 3VDC GSMTX2 3VBB CLK13M VAGC QTX1 _BANDSEL _RESET 3VLNADCS 3VLNAGSM 3VLO1 ITX1 3VLO2 3VMD 3VX GSMTX1 VBATT BANDSEL ITX TXPOWER QRXP QTX1 TXEN1 TXEN1 QTX RF_ON_OFF DEMODEN RXEN_FEDCS GSMTX2 3V_RTC RF_ON_...

Page 28: ...NDATA 3VDC IRXP ITX1 TXL01 RXL01DCS DEMODEN QTX 3VLNAGSM RXL01DCS TXEN1 DCSTX1 VBATT RXL03 SYNCLK TXL02 TXPOWER GSMTX1 3VMD RXEN_FEGSM DESIGNS s50 0040a01 iss_AC radio RXDCSIN TXEN2 ITX BANDSEL TXL01 RXGSMIN AFC GSMTX2 DCSTX2 ANT VBATT 3VTX BANDSEL _BANDSEL SYNDATA ITX QTX SYNCLK AFC SYNEN ITX1 QTX1 VAGC RXEN_FEDCS RXEN_FEGSM DEMODEN CLK13M DCSTX1 GSMTX1 3VMD 3VLO1 3VDC 3VDEMOD 3VLNADCS 3VPLL 3VLO...

Page 29: ..._FINRF 6 Q604 CPORF 3 12 DATA 16 FINIF FINRF 5 10 FO_LD GND 9 4 GND1 7 GND2 14 GND3 17 GND4 LE 13 8 OSCIN VCCIF 20 1 VCCRF 19 VPIF VPRF 2 U603 LMX2330L PLL CLK 11 18 CPOIF C630 10nF D600 10 R602 100nF SMV1249 001 51 R649 C618 L607 3 3nH 3 9nF C609 10nF C615 3VLO1 3VPLL 3VPLL R650 10 3VX 6 2K R606 1nF C637 22 R654 C604 12pF R617 120 U604 MRFIC0916 1 GND GND1 4 RF_IN 2 3 RF_OUT R615 SOT C617 22pF 10...

Page 30: ...F C315 F301 1 GND1 3 GND2 4 GND3 6 GND4 IN 2 OUT 5 GND1 3 GND2 4 14 GND3 GND4 10 9 LO LOX 8 11 MI MIX 12 MO 5 MOX 6 13 STB VCC 7 B4703 FILTER MIXER PMB2333 U305 2 AI 15 AO 1 AREF 16 GC L305 8 2nH C305 22pF L309 6 8nH L310 8 2nH C306 100pF C368 3VLNADCS 33pF FAR F5CH 942M50 L2KM FILTER F302 GND1 1 GND2 3 GND3 4 GND4 6 IN 2 5 OUT L302 100nH 12nH L308 F300 B4818 10 COIL GND1 3 GND2 4 GND3 6 GND4 9 GN...

Page 31: ...pF 10 R500 33nH L505 10 R502 27pF C517 R524 10 3VTXVCODCS 3VTXVCODCS 330 R525 D G S R512 910 100pF C502 U502 TP0101T 3VMD R522 240 100nF 910 R507 100pF C500 C521 C522 1nF 330 R526 C507 68pF 51 R520 C515 22pF CONTROL GND1 GND2 GND3 GND4 OUTPUT SUPPLY L504 33nH 68nH X500 MQE9P7 897 3VTXVCOGSM L503 R519 51 Q500 2N7002 D G S R514 3R9 C516 3VTXVCOGSM 3VMD 10nF C531 100pF 1 5nF 3VMD C523 C524 C528 4 7pF...

Page 32: ...AMP 2 GND1 4 GND2 6 GND3 8 GND4 1 PIN POUT 7 3 VAPC VDD 5 100pF C411 C459 27pF 27pF C418 3VALC C409 220pF R419 10K C423 3VTX 3 3K_1 R409 27pF 120pF C445 PIN 1 7 POUT VAPC 3 5 VDD 3VDCS 3 9K R407 POWER_AMP PF0414B U408 GND1 2 GND2 4 GND3 6 GND4 8 C460 27pF 5 6nH L402 MCL4154 D401 R420 51 10nF 91 R427 C433 D400 HSMS 2805 L31 C464 68 R445 220uF 6 3V U405 LDC15D140A0001 COUPLER GND1 2 6 GND2 1 PORT1_G...

Page 33: ..._ON TXEN2 SIMRST BAT_TYPE ON_OFF REED STARTUP_VOLTS 3V_RTC VBATT BACKLIGHT RXEN_FE CSRAM uP_ON_OFF BBFILTEN BFI BOOT MAX_VOLT MIC CSRAM CSROM CSVOC BBFILTEN IRXP QRXP VMID DCSTX1 VF VBATT CSROM REFADCN RD KIRX1 KQRX LCD_A2 LCD_WR TXSFM BAT_VSET 3VBB RS232_RXD RS232_TXD REFTXP RF_ON_OFF RI_LIGHT WR _RESET SDA SPK2N KEYBOARD_ROW 0 4 RXCLK REFADCN RXEN_FE CHRG_CURRENT RD DCIN DCVOLT MAX_VOLT CF CHG_O...

Page 34: ...16 3 DATA DDRV 4 DVCC 5 GND 9 14 I_O 8 M0 7 M1 2 RIN 15 RST VCC 13 12 C102 U102 LTC1555 CONVERTER 100nF 2SA1576 Q959 2 3 1 100K R991 R988 10K B8 S CE1 B3 S CE2 S GND E10 A7 S OE S VCC D4 B4 S WE T1 C3 D6 T2 T3 E6 E7 T4 F GND2 G7 H8 F OE C5 F RP D10 F VCC F VCCW E3 C4 F WE E4 F WP FDQ10 E9 D8 FDQ11 FDQ12 C7 C9 FDQ13 FDQ14 B10 A9 FDQ15 FDQ8 G9 F10 FDQ9 H9 S A18 A9 B6 DQ0 G10 F9 DQ1 DQ2 F8 E8 DQ3 DQ4...

Page 35: ...1 VDDO 1 16 VDDO 2 69 VDD_PLL 24 VREFN VREFP 23 4 VSSI 1 47 VSSI 2 10 VSSO 1 17 VSSO 2 41 VSSO 3 44 PCMIN 46 PCMOUT PCMRDY 68 32 PWO1N 30 PWO1P 33 PWO2N 34 PWO2P 79 RDN 59 RXCLK 61 RXDATA 60 RXRDY SDI1 40 42 SDI2 43 SDI3 45 SDI4 SP 12 39 DAICLK DAIRST 25 13 GPI05 53 GPIO0 GPIO1 52 GPIO2 51 50 GPIO3 GPIO4 49 GSMRDY 67 H13M 64 INT1 65 INT2 66 26 MICREFN 27 MICREFP 71 MP NRST 62 6 AD4 7 AD5 8 AD6 9 A...

Page 36: ...I22 23 I23 24 I24 25 I25 26 I26 3 I3 4 I4 5 I5 6 I6 7 I7 8 I8 9 I9 VBATT INTERFACE CONNECTOR J176 1 I1 10 I10 11 I11 12 I12 13 I13 14 I14 15 I15 16 I16 17 I17 18 I18 19 I19 2 2 2pF C177 NC L176 3VBB R105 100 100 D104 VC060305A150 D179 VC060314A300 1 2 R187 C176 NC 100 R182 0 R184 R183 100 100 R180 R181 100 L177 12nH R179 100 100 R178 33nF R177 100 C180 C181 33nF 33nF C179 C178 L175 2 7nH 33nF 100 ...

Page 37: ...9 1K R994 J180 28 C170 EL1 B 2 1uF J180 6 6 J180 7 7 J180 24 24 C1005 100nF J180 23 23 5 6nF C1004 J151 1 1 C171 1uF 4 V Vout 7 J151 19 19 CL 150YG CD T LED100 J151 21 21 U969 D361A 2 Base CHF 3 E 5 GND 6 L 1 8 L 15 3VBB J151 3 3 21 J180 27 27 J151 15 J151 4 4 J180 20 20 J180 21 H2 J151 2 2 5 100K R162 J151 8 8 J151 5 R1001 1K MMBT2907A Q958 1 3 2 17 2SD2114KT146 Q961 1uF C172 J151 17 EL1 A 1 C167...

Page 38: ... H3 DATA15 DATA2 D2 DATA3 D1 DATA4 E4 DATA5 E3 DATA6 E1 DATA7 F4 DATA8 BFI N12 BUSACK M12 BUSREQ COL0 A13 A12 COL1 COL2 B11 COL3 A11 D10 COL4 CSCOD N13 M13 CSDEC CSRAM C9 CSROM A9 J4 CSUSR1 AUXV2 K1 CSUSR2 AUXV3 CSUSR3 AUXV4 K2 B9 CSVOC F13 ADD5 D7 ADD6 ADD7 A6 ADD8 B6 ADD9 D6 AFC P L5 AGC P K6 N7 AUXV0 AUXV1 N6 M6 AUXVREFN M7 AUXVREFP AVD 1 N2 M5 AVD 2 AVS 1 N5 AVS 2 M4 N4 AVS 3 J12 ADD0 B8 ADD1 ...

Page 39: ...0K_1 R132 1 C117 100nF 1 2 3 4 6 TS925IPT U127 A OPAMP 3 2 UMC5N U128 3 9nF C128 3 9nF C136 C141 100nF 100nF C134 100nF C135 1nF C126 R136 680 R135 100 L129 330u 1K_1 R133 R126 47K C130 SOT R129 100 470u L128 R130 L127 330u 470u 680 L126 14 15 16 R127 1K_1 7 OPAMP U127 C TS925IPT 12 11 10 TS925IPT U127 D OPAMP BBFILTEN 3VBBF OPAMP U127 B TS925IPT 5 6 QRXP KQRX1 AVCC VMID IRXP KQRX KIRX KIRX1 ...

Page 40: ...332_1 100nF C901 10K R907 U905 GND 3 2 INA NC 1 4 OUTY VCC 5 10K TC7S04FU TC7S08FU 5 3 1 IN1 2 IN2 4 OUT AVCC 3VBB R906 U900 TC7S08FU 5 3 IN1 1 IN2 2 OUT 4 U904 3 1 IN1 2 IN2 4 OUT C902 100nF 100nF U902 TC7S00FU 5 C904 C905 3VBB 100nF R903 1 2K_1 R905 1 2K_1 REFTXN R904 10K_1 REFTXP REFADCP REFADCN RXEN_FEDCS RXEN_FEGSM DCSTX1 GSMTX1 TXEN2 TXEN1 BANDSEL RXEN_FE _BANDSEL GSMTX2 DCSTX2 ...

Page 41: ...GND2 4 GND3 6 GND4 8 16 GND5 11 GND6 9 GND7 OVP 5 8 2K_1 R266 D252 DAN222 R251 100K R252 100K C254 100nF C253 6 8uF 25V 3VBB L251 10uH GND IN OUT R255 10K D251 UMN1 2 RN1102 Q255 BLM11P600S F201 R265 300_1 R263 100K C260 100nF R256 10K 18K_1 R261 R260 270K_1 100K_1 R259 R258 82K_1 2 7K R223 STARTUP_VOLTS 1UF 100nF C258 C257 1k R264 D255 UPS5817 C259 100nF 10nF C262 RN1104 Q257 GND IN OUT R254 100K...

Page 42: ...M5 U811 4 ADJ EN 3 2 GND 1 IN 5 OUT 3V8 C826 10uF 6 3V 3VBB POWER_ON 3VBB C801 10nF R995 1K U812 MAX1676 7 BATT CLSEL 4 FB 1 8 GND LBI 2 9 LX 10 OUT REF 5 _LBO 3 6 _SHDN P 3VX 3VDEMOD 3VLNADCS 3VX 3V8 3V8 RF_ON_OFF C828 10nF 3VDC C873 220uF 6 3V STARTUP_VOLTS R812 100K 250uAH C863 MS414 ADJ 4 3 EN GND 2 IN 1 OUT 5 10uF 6 3V C806 C832 3VLO1 U806 MIC5205 3 0BM5 U804 ADJ 4 3 EN 2 GND 1 IN 5 OUT AVCC ...

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