CY39C031WQN-G-211-JNEFE1

Please note that Cypress is an Infineon Technologies Company. The document following this cover page is marked as “Cypress” document as this is the company that originally developed the product. Please note that Infineon will continue to offer the product to new and existing customers as part of the Infineon product portfolio. Continuity of document content The fact that Infineon offers the following product as part of the Infineon product portfolio does not lead to any changes to this document. Future revisions will occur when appropriate, and any changes will be set out on the document history page. Continuity of ordering part numbers Infineon continues to support existing part numbers. Please continue to use the ordering part numbers listed in the datasheet for ordering. www.infineon.com AN INFINEON TECHNOLOGIES COMPANY THIS SPEC IS OBSOLETE Spec No: 002-08407 Spec Title: CY39C031 2CH BUCK DC/DC CONVERTER + 1CH LDO WITH I2C INTERFACE AND SW FET Replaced by: NONE CY39C031 2ch Buck DC/DC Converter + 1ch LDO with I2C Interface and SW FET Description The CY39C031 contains 2ch buck DC/DC converter and 1ch LDO. It is possible to supply the main power supply line in a system by using only one chip. The current mode system is adopted for the DC/DC converter, and it is possible to use the chip inductor with the high switching frequency operation which contains internal SW FET. The CY39C031 contains the output setting resistor and the the phase compensation circuit, and contributes to reduce the number of external components and the mounting area. Also, it contains the CTL input pin which can control the ON/OFF for each CH, the Power Good signal output pin and the I2C communication interface, therefore it is easy to design the power supply sequence. It is possible to tune in the output voltage exactly using the I2C communication and possible to correspond to the DVS/ASV system. Features  Operating input voltage range:2.5 V to 5.5 V (Maximum rating: 7 V)  Output voltage setting range, Maximum output current: DD1*:1.0 V to 1.3 V (20 mV/step), 1.4 A (DC) DD2*:1.2 V to 1.95 V (50 mV/step), 0.6 A (DC) LDO:2.8 V/2.85 V/3.0 V/3.3 V, 0.25 A (DC) Note: Each channel has selective preset voltage (Lineup for a total of 32 kinds) .  Soft-start time setting range: 0.9 ms to 14.3 ms (approximately 0.9 ms/step)  Switching frequency for the DC/DC block:3 MHz (fixed)  Communication interface: I2C (ON/OFF, Output voltage, Soft-start time setting)  Built-in PFM/PWM auto switching mode  Built-in function: Output setting resistor, Phase compensation circuit, Discharge resistor, Soft-start  Each Channel Power Good output function (Open-drain)  Protection function: Under voltage lockout protection circuit (UVLO), Over current protection circuit (OCP), Thermal shutdown protection circuit (TSD)  Error signal output pin installed (Open-drain)  Small package: QFN28 (4 mm × 4 mm × 0.8 mm, 0.4 mm pitch) *: DD1,DD2 : DC/DC converter block 1, 2 Applications Network equipment: Wifi-tuner, Surveillance camera Data-storage device: HDD, SSD, Picture recording equipment Image and voice output equipment: MFP, Printer, Scanner, Projector, Electrophone, STB Various terminals: POS, FA, HEMS etc. Cypress Semiconductor Corporation Document Number: 002-08407 Rev. *D • 198 Champion Court • San Jose, CA 95134-1709 • 408-943-2600 Revised February 16, 2022 CY39C031 Contents Description .......................................................................................................................................................... 1 Features ............................................................................................................................................................. 1 Applications ........................................................................................................................................................ 1 1. Application Circuit Example......................................................................................................................... 3 2. Recommended Application Specifications .................................................................................................. 4 3. Pin Assignment ............................................................................................................................................ 6 4. Pin Descriptions (PKG) ............................................................................................................................... 7 5. Block Diagram ............................................................................................................................................. 9 6. Absolute Maximum Ratings....................................................................................................................... 10 7. Recommended Operating Conditions ........................................................................................................11 8. Electrical Characteristics ........................................................................................................................... 12 9. Operation Mode List .................................................................................................................................. 15 10. State Transition Diagram ........................................................................................................................... 16 11. Turning On and Off Sequence (Turning On CTL*:CTL1, CTL2, CTLMAIN=VCC Simultaneously) .......... 17 12. CTL* Turning On and Off Sequence 1 (VCC→CTL*: CTL1, CTL2, CTLMAIN) ........................................ 18 13. CTL* Turning On and Off Sequence 2(VCC→CTLMAIN→CTL1→CTL2) ................................................ 19 14. CTL* Pin Threshold Voltage ...................................................................................................................... 20 15. Protection Operation Sequence ................................................................................................................ 21 16. Operation Condition, Stop Circuit and Release Condition for Protection Circuit ...................................... 23 17. DD Soft-Start Operation ............................................................................................................................ 24 18. Discharge Operation ................................................................................................................................. 25 19. PG1/PG2/PGL PIN and ERR PIN ............................................................................................................. 26 20. I2C Interface............................................................................................................................................... 27 21. Structure of I2C Interface and Data ........................................................................................................... 33 22. I/O Pin Equivalent Circuit Diagram ............................................................................................................ 38 23. I/O Circuit Type .......................................................................................................................................... 39 24. Typical Operation Characteristic Measurement Circuit ............................................................................. 40 25. Reference Data ......................................................................................................................................... 42 26. Usage Precaution ...................................................................................................................................... 62 27. Ordering Information ................................................................................................................................. 63 28. Preset Code (CY39C031) ......................................................................................................................... 63 29. Package Dimensions ................................................................................................................................. 64 Document History ............................................................................................................................................. 65 Sales, Solutions, and Legal Information ........................................................................................................... 66 Document Number: 002-08407 Rev. *D Page 2 of 66 CY39C031 1. Application Circuit Example Vin 5.0V MB39C031 4.7μF 4.7μF 0.1μF LX1 IN1 PGND1 VCC VCC LX2 IN2 PGND2 4.7μF CTL1 CTL2 CTLL CTLMAIN LDO 0.1μF VR VREF Vo1 1.2V 1.4A 10μF Vo2 1.8V 0.6A 10μF LDO 3.3V 0.25A 10μF VCCI2C SCL SDA ADDSEL I2C Signal 1.5μH 1.5μH 0.1μF CTL Signal 0.47μF PVCC1 PVCC2 PVCCL 100k 100k 100k 100k PG1 PG2 PGL ERR GND GND Document Number: 002-08407 Rev. *D Page 3 of 66 CY39C031 2. Recommended Application Specifications [Input Voltage Range] Input Voltage VCC (V) Min Typ Max 2.5 3.6 5.5 [Output Specification] Accuracy Symbol Channel (Ta=+25°C) Output Limit Output Voltage Current Current (V) (mA) (mA) Min Typ Max Max Min 14.3 1.01 1.02 1.03 0.9* 1.03 1.04 1.05 1.8 1.05 1.06 1.07 2.7 1.07 1.08 1.09 3.6 1.09* 1.10* 1.11* 4.5 1.13 1.14 1.15 1.15 1.16 1.17 5.4 Buck 1400 1.17 1.18 1.19 2000 (synchronous rectification) C-mode 3.0 1.5 10 6.3 7.2 9.0 1.21 1.22 1.23 9.9 1.23 1.24 1.25 10.8 1.24 1.26 1.28 11.6 1.26 1.28 1.30 12.5 1.28* 1.30* 1.32* 13.4 1.19* 1.20* 1.21* 14.3 1.24 1.25 1.27 0.9* 1.28 1.30 1.32 1.8 1.33* 1.35* 1.37* 2.7 1.38 1.40 1.42 3.6 1.43 1.45 1.47 4.5 1.53 1.55 1.57 1.58 1.60 1.62 5.4 Buck 600 1.63 1.65 1.67 900 (synchronous rectification) C-mode 3.0 1.5 10 6.3 7.2 8.1 1.68 1.70 1.72 9.0 1.73 1.75 1.77 9.9 1.78* 1.80* 1.82* 10.8 1.83 1.85 1.87 11.6 1.88 1.90 1.92 12.5 1.93 1.95 1.97 13.4 Document Number: 002-08407 Rev. *D 5 8.1 1.19* 1.20* 1.21* 1.48* 1.50* 1.52* DD2 Vo2 ±1.2% Switching Coil Output Soft-start Discharge Capacitance Time Resistance Remarks Frequency (μH) (ms) (MHz) (μF) (kΩ) 0.99* 1.00* 1.01* 1.11 1.12 1.13 DD1 Vo1 ±1.2% Mode 5 Built-in SW FET Built-in output setting resistors Operation mode switching (Fixed PWM, PFM/PWM) Built-in SW FET Built-in output setting resistors Operation mode switching (Fixed PWM, PFM/PWM) Page 4 of 66 Accuracy Symbol Channel CY39C031 LDO LDO ±1.8% Output Limit Output Voltage Current Current (V) (mA) (mA) Min Typ Max Max Mode Min Switching Coil Output Soft-start Discharge Capacitance Time Resistance Remarks Frequency (μH) (ms) (MHz) (μF) (kΩ) 2.75 2.80 2.85 14.3 2.80* 2.85* 2.90* 0.9 2.95 3.00 3.05 1.8 3.24* 3.30* 3.36* 2.7* - - - 3.6 - - - 4.5 - - - 5.4 - - - - - - - - - 8.1 - - - 9.0 - - - 9.9 - - - 10.8 - - - 11.6 - - - 12.5 - - - 13.4 250 300 LDO - - 4.7 6.3 7.2 5 *: Preset value Note: It is possible to set the output voltage and to change the soft-start time using I2C. Document Number: 002-08407 Rev. *D Page 5 of 66 CY39C031 3. Pin Assignment VCC ERR PVCCL LDO PGL CTLL GND (TOP VIEW) 28 27 26 25 24 23 22 CTL1 1 21 CTL2 PG1 2 20 PG2 PGND1 3 19 PGND2 LX1 4 18 LX2 PVCC1 5 17 PVCC2 IN1 6 16 IN2 CTLMAIN 7 15 VREF Top View 8 9 10 11 12 13 14 VCC VCCI2C SCL SDA ADDSEL GND VR EP(Exposed Pad) (WNO028) Document Number: 002-08407 Rev. *D Page 6 of 66 CY39C031 4. Pin Descriptions (PKG) Circuit Block DD1 DD2 LDO CTL ERR Numb er of Pin Pin Name pin for No PKG I/O Description (PKG) PullPAD down Treatment Resist when not ance using DD1 PAD Treatment when not using DD2 PAD Treatment PAD when not Treatment using I2C when not using LDO Communicati on IN1 1 6 I DD1·Output voltage feedback pin. - GND connection - - - PVCC1 1 5 - DD1·Output block power supply pin - VCC connection - - - LX1 1 4 O DD1·Pin for inductance connection. - Open - - - PG1 1 2 O DD1·POWERGOO D output pin - Open - - - PGND1 1 3 - DD1·Output block ground pin - GND connection - - - IN2 1 16 I DD2·Output voltage feedback pin. - - GND connection - - PVCC2 1 17 - DD2·Output block power supply pin - - VCC connection - - LX2 1 18 O DD2·Pin for inductance connection. - - Open - - PG2 1 20 O DD2·POWERGOO D output pin - - Open - - PGND2 1 19 - DD2·Output block ground pin - - GND connection - - PVCCL 1 26 - LDO·Power supply pin - - - VCC connection - LDO 1 25 O LDO·Output pin - - - Open - PGL 1 24 O LDO·POWERGOO D output pin - - - Open - CTL1 1 1 I DD1 Control pin  CTL2 1 21 I DD2 Control pin  - CTLL 1 23 I LDO Control pin  - - CTLMAIN 1 7 I Control pin for common block and digital block *  - - - - ERR 1 27 O ERR signal output pin - - - - - Document Number: 002-08407 Rev. *D Open Open - - - - Open - Page 7 of 66 CY39C031 Circuit Block Numb er of Pin Pin Name pin for No PKG I/O Description (PKG) PullPAD down Treatment Resist when not ance using DD1 PAD Treatment when not using DD2 PAD Treatment PAD when not Treatment using I2C when not using LDO Communicati on VCCI2C 1 9 - Power supply pin for I2C. - - - - GND connection SCL 1 10 I I2C clock pin × - - - Open SDA 1 11 I/O I2C data I/O pin × - - - Open ADDSEL 1 12 I Switch pin for slave address  - - - Open VCC 2 8, 28 - Control circuit block power supply pin - - - - - VREF 1 15 O Reference voltage (2.4 V) output pin - - - - - VR 1 14 O Reference voltage (0.6 V) output pin - - - - - GND 2 13, 22 - Control circuit block ground pin - - - - - GND 1 EP - Ground pin - - - - - I2C Commo n - *: When turning on DD1, DD2 and LDO, it is also necessary to set CTLMAIN to "H". See 9. Operation Mode List for the details. Document Number: 002-08407 Rev. *D Page 8 of 66 CY39C031 5. Block Diagram IN1 PVCC1 VCC:2.5V to 5.5V L Priority A VCC VCC VCC ErrAMP ctl1 PWM Logic AST Control ICOMP LX1 Vo1:1.00V to 1.30V (20mV step) Io(Max):1400mA 0.6V DEC UVLO POR A LV CNV PGND1 SLP PG1 IN2 scp1 cs1 vsel1 clk1 PVCC2 L Priority B VCC VCC PWM Logic AST Control ICOMP LX2 Vo2:1.20V to 1.95V (50mV step) Io(Max):600mA 0.6V DEC UVLO POR B VCC ErrAMP ctl2 LV CNV PGND2 SLP PG2 cs2 vsel2 scp2 clk2 PVCCL LDO:2.80V/2.85V/ 3.00V/3.30V Io(Max):250mA LDO 0.6V ctll DEC UVLO POR csl vsell PGL scpl VREF CTLMAIN Logic control block ctlmain VCCI2C SCL SDA ADDSEL CTL1 ctl1 CTL2 ctl2 CTLL ctll scp1/2/l ERR SCP (counter & latch) OTP Soft-start control Output voltage switch control Common block power supply ctlmain cs1/2/l Common block vsel1/2/l VR,OSC,logic power supply VREF VCC VCC BGR UVLO VREF VREF Reference 0.6V OSC CT RT VR clk1/2 VREF (2.4V) Document Number: 002-08407 Rev. *D VR GND GND : Pin (0.6V) Page 9 of 66 CY39C031 6. Absolute Maximum Ratings Parameter Power supply voltage Input voltage LX voltage Symbol Condition Rating Min Max Unit VCC VCC, PVCC1, PVCC2, PVCCL, VCCI2C pins - 7 V VCTL CTLMAIN, 1, 2, L pins - 7 V VOUT IN1, IN2 pins - 7 V Vlogic SDA, SCL pins - 7 V VLX LX1, LX2 pins -0.3 +7 V - 1720 mW Ta ≤ +25°C Power dissipation PD Maximum junction temperature Tjmax - - +125 °C Storage temperature TSTG - -55 +125 °C Thermal resistor value (θj-a):(50°C/W*) *: When mounted on a QFN28 (WNO028) PKG, 4layers 0.8 mm thickness 117 mm × 84 mm WARNING: Semiconductor devices can be permanently damaged by application of stress (voltage, current, temperature, etc.) in excess of absolute maximum ratings. Do not exceed these ratings. Document Number: 002-08407 Rev. *D Page 10 of 66 CY39C031 7. Recommended Operating Conditions Parameter Power supply voltage General Reference voltage output current Symbol Condition Max Unit VCC pin 2.5 3.6 5.5 V IREF VREF pin -1 - 0 mA IR VR pin -1 - 0 μA -30 +25 +85 °C 2.5 3.6 5.5 V 0 - VCC V 3.5 3.6 5.5 V 0 - VCC V 1.76 - 3.37 V 0 - VCCI2C V Ta Power supply voltage VCC VCC, PVCC1, PVCC2 pins Input voltage VOUT IN1, IN2 pins LDO CH Power supply voltage VCC CTL block Input voltage VCTL CTL* pin Power supply voltage VCC VCCI2C pin Logic input voltage Vlogic SDA, SCL pin Digital block (I2C) Typ VCC Operating temperature DC/DC CH Value Min - VCC, PVCCL pins Output voltage setting: default (3.3 V) *: CTLMAIN, CTL1, CTL2, CTLL WARNING: The recommended operating conditions are required in order to ensure the normal operation of the semiconductor device. All of the device's electrical characteristics are warranted when the device is operated within these ranges. Always use semiconductor devices within their recommended operating condition ranges. Operation outside these ranges may adversely affect reliability and could result in device failure. No warranty is made with respect to uses, operating conditions, or combinations not represented on the data sheet. Users considering application outside the listed conditions are advised to contact their representatives beforehand. Document Number: 002-08407 Rev. *D Page 11 of 66 CY39C031 8. Electrical Characteristics Common Block (Ta=+25°C, VCC=PVCC1, PVCC2, L=3.6V) Parameter Symbol Condition Value Min Typ Max Unit VR VR pin =0 mA 0.594 0.600 0.606 V VREF1 VREF pin =0 mA 2.376 2.400 2.424 V VREF2 VCC pin =2.5 V to 5.5 V 2.370 2.400 2.430 V VREF3 VREF pin =0 mA to -1 mA 2.370 2.400 2.430 V Threshold voltage VTH VCC pin = 2.156 2.20 2.244 V Hysteresis width VH - 0.20 - V Over Current Protection Circuit Block [OCP] Timer time tOCP1 0.5 1 1.5 ms Thermal shutdown Protection Circuit Block [TSD] Stop temperature TTSDH - 150* - °C VCC × 0.7 - VCC V Reference Voltage Block [VR, VREF] Under Voltage Lockout Protection Circuit Block [VCC UVLO] Output voltage Input voltage Control Block (CTL) [CTL] Input current Input pull-down resistor General (DC/DC block) Power supply current DD1, DD2, LDO Default value - VIH CTL* pin VIL CTL* pin ICTLH CTL* pin =3.6 V ICTLL 0 - 0.4 V 2.7 3.6 5.1 μA CTL* pin =0 V - - 1 μA RP CTL* pin - 1 - MΩ IVCCS1 CTL* pin =0 V - 0 1.0 μA IVCCS2 CTLMAIN=3.6 V CTL1, CTL2.L pins =0 V - 80 120 μA IVCC CTLMAIN, L pins =3.6 V Only LDO operation No load - 200 300 μA IVCC CTL* pin = 3.6 V all CH No load (DD operation mode: PFM/PWM mode) - 450 680 μA - 10.8 16.2 mA - 7.2 12.0 μA IVCC IVCCI2C CTL* pin = 3.6 V all CH No load (DD operation mode: Fixed PWM mode) CTLMAIN, L pin=3.6 V VCCI2C pin = 1.8 V *: These are not the rated values. Use these values as reference when planning. Document Number: 002-08407 Rev. *D Page 12 of 66 CY39C031 DD1, DD2 (Ta=+25°C, VCC=PVCC1, PVCC2, L=3.6V) Parameter Symbol Output voltage VOUT Input stability VLINE Load stability VLOAD Condition Output voltage setting: 1.2 V IOUT=-10 mA Value Unit Min Typ Max 1.186 1.20 1.214 V IOUT=-10 mA, VCC=2.5 V to 5.5 V -5 - +5 mV IOUT=-1 mA to -1400 mA (when in Fixed PWM mode) -10 - - mV IOUT=-1 mA to -1400 mA (when in PFM/PWM mode) -10 - +15 mV IN1 pin=1.5 V DC/DC Converter Block [DD1] IN1 pin input impedance RIN output voltage setting: 1.2 V - 400 - kΩ SW PMOS-Tr ON resistance RPMOS LX1 pin=-30 mA - 0.12* - Ω SW NMOS-Tr ON resistance RNMOS LX1 pin= 30 mA - 0.09* - Ω SW PMOS-Tr leak current ILEAK LX1 pin=0 V -1 - - μA SW NMOS-Tr leak current ILEAK LX1 pin=3.6 V - - 1 μA Overcurrent protection value ILIMIT L=1.5 μH 2000 - - mA PFM/PWM reshuffling electric current IPFM L=1.5 μH - 40* - mA Discharge resistor RDIS - - 5 - kΩ Soft-start time tSS 0.8 0.9 1.0 ms Switching frequency fOSC - 2.7 3.0 3.3 MHz Output voltage VOUT Output voltage setting: 1.8 V IOUT=-10 mA 1.778 1.80 1.822 V Input stability VLINE IOUT=-10mA VCC=2.5 V to 5.5 V -5 - +5 mV IOUT=-1 mA to -600mA (when in Fixed PWM mode) -10 - - mV IOUT=-1 mA to -600mA (when in PFM/PWM mode) -10 - +20 mV Load stability DC/DC Converter Block [DD2] VLOAD Preset value IN2 pin input impedance RIN IN2 pin =2.0 V Output voltage setting: 1.8 V - 300 - kΩ SW PMOS-Tr ON resistance RPMOS LX2 pin =-30 mA - 0.16* - Ω SW NMOS-Tr ON resistance RNMOS LX2 pin = 30 mA - 0.14* - Ω SW PMOS-Tr leak current ILEAK LX2 pin =0 V -1 - - μA SW NMOS-Tr leak current ILEAK LX2 pin =3.6 V - - 1 μA Overcurrent protection value ILIMIT L=1.5 μH 900 - - mA PFM/PWM reshuffling electric current IPFM L=1.5 μH - 70* - mA Discharge resistor RDIS Soft-start time tSS Switching frequency fOSC Preset value - - 5 - kΩ 0.8 0.9 1.0 ms 2.7 3.0 3.3 MHz *: These are not the rated values. Use these values as reference when planning. Document Number: 002-08407 Rev. *D Page 13 of 66 CY39C031 LDO (Ta=+25°C, VCC=PVCC1, PVCC2, L=3.6V) Parameter LDO Block [LDO] Symbol Output voltage VOUT I/O voltage difference VDIF Input stability VLINE Load stability VLOAD Ripple remove ratio RR Value Condition Unit Min Typ Max 3.241 3.300 3.359 V - - 0.20 V -5 - +5 mV IOUT=-1mA to -150 mA -30 -20 - mV PVCCL=0.2 Vrms, f=10 Hz, IOUT=-150 mA 35 75 - dB 15 50 - dB Output voltage setting : 3.3 V IOUT=-10 mA IOUT=-10 mA IOUT=-10 mA, VCC=3.5 V to 5.5 V PVCCL=0.2 Vrms, f=10 kHz, IOUT=-150 mA Overcurrent protection value ILIMIT Vout×0.9 Control macro consumption current IPVCCLS At stand-by IPVCCL IOUT=0 mA Discharge resistor RDIS Soft-start time tSS 300 - - mA - 0 1 μA - 80 105 μA - 5 - kΩ 2.4 2.7 3.0 ms Preset value Digital Block (Ta=+25°C, VCC=PVCC1, PVCC2, L=3.6V) Parameter Symbol Condition Value Min Typ Max Unit Output voltage VOL PG1, PG2, L pins IOL=1mA - - 0.4 V Output current IOL PG1, PG2, L pins 1 - - mA Low-voltage detection Vth IN1, IN2, LDO pins = - Vo × 0.75* - V Power-on detection voltage Vth IN1, IN2, LDO pins = - Vo × 0.85* - V Error Block Output voltage VOL ERR pin IOL = 1 mA - - 0.4 V [ERR] Output current IOL ERR pin 1 - - mA VIH SCL, SDA pins VCCI2C=3.3 V VCCI2C × 0.7 - VCCI2C V VIL SCL, SDA pins VCCI2C=3.3 V 0 - VCCI2C × 0.3 V IIH SCL, SDA pins VCCI2C=3.3 V - - 10 μA POWER-GOOD Block [Power Good ] Input voltage 2 I C Block [I2C] Input current IIL SCL, SDA pins VCCI2C=3.3 V -10 - - μA Output voltage VOL SDA pin IOL =3 mA - - 0.4 V Output current IOL SDA pin 3 - - mA Input pull-down resistor RP ADDSEL pin - 1 - MΩ *: These are not the rated values. Use these values as reference when planning. Document Number: 002-08407 Rev. *D Page 14 of 66 CY39C031 9. Operation Mode List Mode CTL Signal Operation Block I2C Communication Protection Operating Stand-by Stand-by 2 CTLMAIN (External) L CTL1 (External / I2C) L CTL2 (External / I C) CTLL (External / I2C) 2 General ERR detection H H H L H/L X L L H/L X L L H/L X General OFF ON ON ON Digital Block OFF ON ON ON OSC, VR Block OFF OFF ON*2 OFF DD1 OFF OFF ON/OFF OFF DD2 OFF OFF ON/OFF OFF LDO OFF OFF ON/OFF OFF I2C communication Disabled Enabled Enabled Enabled Thermal shutdown Protection (TSD) Not available Not available Available *1 Over Current Protection (OCP) Not available Not available Available *1 *1:This is the state after detection of ERR. It is possible to release the ERR detection mode by turning the power supply on again or turning CTLMAIN on again. *2:When only LDO is operating, the OSC block stops (OFF) after LDO activation. Also, the VR block keeps operating (ON) after LDO activation. Priority of the external pin/I2C communication for CTL1, CTL2 and L CTLMAIN (External Pin) CTL* (External Pin) CTL* (I2C Communication) Relevant CH H H H Unavailable H H L ON H L H ON H L L OFF L X Communication disabled OFF *:The I2C communication is enabled after the common block and digital block activation setting the external CTLMAIN pin to "H".  When executing the ON/OFF control for DD1, DD2 and LDO using the external pin, don't execute the ON/OFF control using I2C. Aside from the ON/OFF control, it is possible to control everything else using I2C.  When executing the ON/OFF control for DD1, DD2 and LDO using I2C, input "L" to the CTL* pin (the pin connection condition). Document Number: 002-08407 Rev. *D is open or in the GND Page 15 of 66 CY39C031 10. State Transition Diagram Stand-by (1) (2) Stand-by 2 (3) (4) General (5) (6) Error detection (1)External CTLMAIN pin "H" (2)External CTLMAIN pin "L" (3)External CTL pin "H" / I2C communication "relevant CH_ON" (4)External CTL pin "L" / I2C communication "relevant CH_OFF" (5)Error detection (OCP, OCP_1ms continuation) (6)Turning on the power supply again (equal to or less than uvlo_vcc reset voltage) or setting CTLMAIN to "L" Notes:  When executing the ON/OFF control for DD1, DD2 and LDO using the external pin, don't execute the I2C. Aside from the ON/OFF control, it is possible to control everything else using I2C. ON/OFF control using  When executing the ON/OFF control for DD1, DD2 and LDO using I2C, input "L" to the CTL* pin (the pin is open or in the GND connection condition). Document Number: 002-08407 Rev. *D Page 16 of 66 CY39C031 11. Turning On and Off Sequence (Turning On CTL*:CTL1, CTL2, CTLMAIN=VCC Simultaneously) 2.0V 2.2V VCC VCCI2C 0V CTL* uvlo_vcc (IC internal signal) 2.4V VREF 90% VR 0.6V osc (IC internal signal) ctl* (IC internal signal) 85% Discharge 85% Discharge DD1 PG1 DD2 PG2 UVLO release to DD*activation Time till start * Typ:200μS Max:300μS Soft-start time *: VREF and VR activations depend on the VREF pin capacitance and VR pin capacitance. Time in the sequence figure above is applied for the following condition.  VREF pin capacitance : 0.1 μF  VR pin capacitance : 0.47 μF Document Number: 002-08407 Rev. *D Page 17 of 66 CY39C031 12. CTL* Turning On and Off Sequence 1 (VCC→CTL*: CTL1, CTL2, CTLMAIN) VCC 3.6V VCCI2C 0V CTL* uvlo_vcc (IC internal signal) 2.4V VREF VR osc (IC internal signal) 90% 0.6V ctl* (IC internal signal) 85% Discharge 85% Discharge DD1 PG1 DD2 PG2 Turning on CTL * to DD* activation Time till start * Typ:270μS Max:450μS Soft-start time *: VREF and VR activations depend on the VREF pin capacitance and VR pin capacitance. Time in the sequence figure above is applied for the following condition.  VREF pin capacitance : 0.1 μF  VR pin capacitance : 0.47 μF Document Number: 002-08407 Rev. *D Page 18 of 66 CY39C031 13. CTL* Turning On and Off Sequence 2(VCC→CTLMAIN→CTL1→CTL2) VCC 3.6V VCCI2C 0V CTLMAIN uvlo_vcc (IC internal signal) VREF 2.4V (1) CTL1 90% VR 0.6V osc (IC internal signal) ctl1 (IC internal signal) (2) Discharge 85% DD1 PG1 Soft-start time CTL2 ctl2 (IC internal signal) 85% DD2 Discharge PG2 Soft-start time (1) Time from turning on CTLMAIN to VREF activation completion (=communication enabled)* Typ: 130 μs, Max: 200 μs (2) Time from turning on CTL1 to ctll (IC internal signal) "H" Typ: 150 μs, Max: 250 μs *: VREF and VR activations depend on the VREF pin capacitance and VR pin capacitance. Time in the sequence figure above is applied for the following condition.  VREF pin capacitance : 0.1 μF  VR pin capacitance : 0.47 μF Document Number: 002-08407 Rev. *D Page 19 of 66 CY39C031 14. CTL* Pin Threshold Voltage The input circuit structure for the CTL* pin is the schmitt trigger style, and the threshold voltage shows the hysteresis characteristics when CTL* OFF → ON and ON → OFF. (See "·CTL* pin equivalent circuit diagram" below.) Also, the threshold voltage level depends on the VCC pin voltage. Moreover, make sure to input either the "H" level (>"VCC×0.7"V) or "L" level (