TCV7106FN TOSHIBA CMOS Integrated Circuit Silicon Monolithic TCV7106FN Buck DC-DC Converter IC The TCV7106FN is a single-chip buck DC-DC converter IC. The TCV7106FN contains high-speed and low-on-resistance power MOSFETs for the main switch and has switchable operation mode, synchronous and non-synchronous. So the TCV7106FN can achieve high efficiency in the large load current range. Features • Enables up to 2.5A (@ VIN = 5V) ／2A (@ VIN = 3.3V) of load current (IOUT) with a minimum of external components. • High efficiency: η = 95% (typ.) Weight: 0.017 g (typ.) (synchronous mode @VIN = 5V, VOUT = 3.3V, IOUT = 0.7A) • High efficiency in the large load current range is realized because of switchable operation mode, synchronous and non-synchronous. • Operating voltage range: VIN = 2.7V to 5.6V • Low ON-resistance: RDS (ON) = 0.18Ω (high side) / 0.12Ω (low-side) typical (@VIN = 5V, Tj = 25°C) • Oscillation frequency: fOSC = 550kHz (typ.) • Feedback voltage: VFB = 0.8V ± 1% (@Tj = 0 to 85°C) • Uses internal phase compensation to achieve high efficiency with a minimum of external components. • Allows the use of a small surface-mount ceramic capacitor as an output filter capacitor. • Housed in a small surface-mount package (PS-8) with a low thermal resistance. Part Marking Pin Assignment Part Number (or abbreviation code) LX 8 EN MODE 7 6 VFB 5 Lot No. V 1 0 6_ The dot (•) on the top surface indicates pin 1. 1 2 3 4 PGND VIN1 VIN2 SGND The lot number consists of three digits. The first digit represents the last digit of the year of manufacture, and the following two digits indicates the week of manufacture between 01 and either 52 or 53. Manufacturing week code (The first week of the year is 01; the last week is 52 or 53.) Manufacturing year code (last digit of the year of manufacture) The underscore”_” after a part number shows the addition of the Feedback pin voltage detection. This product has a MOS structure and is sensitive to electrostatic discharge. Handle with care. The product(s) in this document (“Product”) contain functions intended to protect the Product from temporary small overloads such as minor short-term overcurrent, or overheating. The protective functions do not necessarily protect Product under all circumstances. When incorporating Product into your system, please design the system to avoid such overloads upon the Product, and to shut down or otherwise relieve the Product of such overload conditions immediately upon occurrence. For details, please refer to the notes appearing below in this document and other documents referenced in this document. 1 2011-11-05 TCV7106FN Ordering Information Part Number Shipping TCV7106FN (TE85L, F) Embossed tape (3000 units per reel) Block Diagram VIN2 VIN1 Current detection Slope MODE Oscillator Compensation Under voltage lockout Control + - Driver Logic Feedback pin voltage detection - LX Short-Circuit Protection + 0.36V Error Amplifier - VFB + Soft Start EN Phase compensation PGND Ref.Voltage (0.8V) SGND Pin Description Pin No. Symbol 1 PGND 2 VIN1 3 VIN2 4 SGND 5 VFB Description Ground pin for the output section Input pin for the output section This pin is placed in the standby state if VEN = L. Standby current is 10μA or less. Input pin for the control section This pin is placed in the standby state if VEN = L. Standby current is 10μA or less. Ground pin for the control section Feedback pin This input is fed into an internal error amplifier with a reference voltage of 0.8V (typ.). Mode select pin When EN ≥ 1.5V (@ VIN = 5V), the synchronous rectifier type is applied and the internal low-side FET is allowed to operate. Thus TCV7106FN operates in PWM mode. 6 MODE When EN ≤ 0.5V (@ VIN = 5V), the non-synchronous rectifier type is applied and the internal low-side FET is not allowed to operate. The Schottky barrier diode should be connected between PGND and LX pins This pin is pulled up at 1.2μA (typ.) in operation. Enable pin 7 EN When EN ≥ 1.5V (@ VIN = 5V), the internal circuitry is allowed to operate and thus enable the switching operation of the output section. When EN ≤ 0.5V (@ VIN = 5V), the internal circuitry is disabled, putting the TCV7106FN in Standby mode. This pin has an internal pull-down resistor of approx. 500kΩ. 8 LX Switch pin This pin is connected to high-side P-channel MOSFET and low-side N-channel MOSFET. 2 2011-11-05 TCV7106FN Absolute Maximum Ratings (Ta = 25°C) (Note) Characteristics Symbol Rating Unit Input pin voltage for the output section (Note 1) VIN1 −0.3 to 7 V Input pin voltage for the control section (Note 1) VIN2 −0.3 to 7 V Feedback pin voltage VFB −0.3 to 7 V (Note 1) Enable pin voltage (Note 1) VEN −0.3 to 7 V Mode select pin voltage (Note 1) VMODE −0.3 to 7 V VEN-VIN2 VEN – VIN2 < 0.3 V VMODE-VIN2 VMODE – VIN2 < 0.3 V VLX −0.3 to 7 V ILX ±2.9 A PD 0.9 W Tjopr −40 to125 °C Tj 150 °C Tstg −55 to150 °C VEN – VIN2 voltage difference VMODE – VIN2 voltage difference Switch pin voltage (Note 2) Switch pin current Power dissipation (Note 3) Operating junction temperature Junction temperature (Note 4) Storage temperature Thermal Resistance Characteristics Characteristics Symbol Max Unit Thermal resistance, junction to ambient Rth (j-a) 110.2 (Note 3) °C/W Note: Using continuously under heavy loads (e.g. the application of high temperature/current/voltage and the significant change in temperature, etc.) may cause this product to decrease in the reliability significantly even if the operating conditions (i.e. operating temperature/current/voltage, etc.) are within the absolute maximum ratings and the operating ranges. Please design the appropriate reliability upon reviewing the Toshiba Semiconductor Reliability Handbook (“Handling Precautions”/“Derating Concept and Methods”) and individual reliability data (i.e. reliability test report and estimated failure rate, etc) Note 1:Using this product continuously may cause a decrease in the reliability significantly even if the operating conditions are within the absolute maximum ratings. Set each pin voltage less than 5.6V taking into consideration the derating. Note 2:The switch pin voltage (VLX) doesn’t include the peak voltage generated by TCV7106FN’s switching. A negative voltage generated in dead time is permitted among the switch pin current (ILX). Note 3: Single-sided glass epoxy board FR-4 25.4 × 25.4 × 0.8 (Unit: mm) Note 4:The TCV7106FN may enter into thermal shutdown at the rated maximum junction temperature. Thermal design is required to ensure that the rated maximum operating junction temperature, Tjopr, will not be exceeded. 3 2011-11-05 TCV7106FN Electrical Characteristics (Tj = 25°C, VIN1 = VIN2 = 2.7V to 5.6V, unless otherwise specified) Characteristics Operating input voltage Operating current Symbol VOUT (OPR) IIN(STBY)1 Standby current IIN(STBY)2 High-side switch leakage current EN threshold voltage EN input current MODE threshold voltage MODE input current Typ. Max Unit ― 2.7 ― 5.6 V ― 450 680 μA 0.8 ― ― V ― ― 10 ― ― 10 VIN1 = VIN2 = VEN = VFB = 5V VMODE = 5V VEN = VIN1 = VIN2 VIN1 = VIN2 = 5V , VEN = 0V VFB = 0.8V VIN1 = VIN2 = 3.3V, VEN = 0V VFB = 0.8V VIN1 = VIN2 = 5V, VEN = 0V VFB = 0.8V, VLX = 0V ― ― 10 VIH (EN) 1 VIN1 = VIN2 = 5V 1.5 ― ― VIH (EN) 2 VIN1 = VIN2 = 3.3V 1.5 ― ― VIL (EN) 1 VIN1 = VIN2 = 5V ― ― 0.5 VIL (EN) 2 VIN1 = VIN2 = 3.3V ― ― 0.5 IIH (EN) 1 VIN1 = VIN2 = 5V, VEN = 5V 6 ― 13 IIH (EN) 2 VIN1 = VIN2 = 3.3V, VEN = 3.3V 4 ― 9 VIH (MODE) VIN1 = VIN2 = 5V 1.5 ― ― VIL (MODE) VIN1 = VIN2 = 5V ― ― 0.5 IIH (MODE) VIN1 = VIN2 = 5V, VEN = 5V ― -1.2 -2.5 VFB1 VIN1 = VIN2 = 5V, VEN = 5V Tj = 0 to 85℃ 0.792 0.8 0.808 VFB2 VIN1 = VIN2 = 3.3V, VEN = 3.3V Tj = 0 to 85℃ 0.792 0.8 0.808 -1 ― 1 ― 0.18 ― ― 0.21 ― ― ― 0.25 ― ― 0.3 ― 0.12 ― ― 0.14 ― ― ― 0.18 ― ― 0.2 IFB VIN1 = VIN2 = 2.7V to 5.6V, VFB = VIN2 VIN1 = VIN2 = 5V , VEN = 5V RDS(ON)(H)1 ILX = - 1A VIN1 = VIN2 = 3.3V , VEN = 3.3V ILX = - 1A VIN1 = VIN2 = 5V , VEN = 5V RDS(ON)(H)3 ILX = - 0.1A , Tj = -40 to 85℃ VIN1 = VIN2 = 3.3V , VEN = 3.3V RDS(ON)(H)4 ILX = - 0.1A , Tj = -40 to 85℃ VIN1 = VIN2 = 5V , VEN = 5V RDS(ON)(L)1 ILX = - 1A VIN1 = VIN2 = 3.3V , VEN = 3.3V RDS(ON)(L)2 ILX = - 1A VIN1 = VIN2 = 5V , VEN = 5V RDS(ON)(L)3 ILX = - 0.1A , Tj = -40 to 85℃ VIN1 = VIN2 = 3.3V , VEN = 3.3V RDS(ON)(L)4 ILX = - 0.1A , Tj = -40 to 85℃ RDS(ON)(H)2 High-side switch on-state resistance Low-side switch on-state resistance Oscillation frequency Undervoltage lockout (UVLO) μA V μA V μA Ω Ω 550 650 kHz 3 4.5 6 ms VIN1 = VIN2 = 2.7V to 5.6V ― ― 100 % TSD VIN1 = VIN2 = 5V ― 150 ― Hysteresis ΔTSD VIN1 = VIN2 = 5V ― 15 ― Detection voltage VUV VEN = VIN1 = VIN2 2.3 2.45 2.6 Recovery voltage VUVR VEN = VIN1 = VIN2 2.4 2.55 2.7 Hysteresis ΔVUV VEN = VIN1 = VIN2 ― 0.1 ― Detection temperature LX current limit Feedback pin detection voltage tSS Dmax VIN1 = VIN2 = VEN = 5V V 450 High-side switch duty cycle fOSC μA VIN1 = VIN2 = 5V, IOUT = 0A, Measured between 0% and 90% points at VOUT. Internal soft-start time Thermal shutdown (TSD) μA ILEAK (H) VFB input voltage VFB input current Min VIN (OPR) IIN Output voltage range Test Condition ILIM1 VIN1 = VIN2 = 4.3V, VOUT = 2V 2.7 3.3 ― ILIM2 VIN1 = VIN2 = 3.3V, VOUT = 2V 2.3 2.9 ― VOLD VEN = VIN1 = VIN2 ― 0.36 ― 4 °C V A V 2011-11-05 TCV7106FN Note on Electrical Characteristics The test condition Tj = 25°C means a state where any drifts in electrical characteristics incurred by an increase in the chip’s junction temperature can be ignored during pulse testing. Application Circuit Example Figure 1 shows a typical application circuit using a low-ESR electrolytic or ceramic capacitor for COUT. VIN VIN1 VIN2 EN EN MODE CIN CC L LX TCV7106FN VFB MODE VOUT RFB1 COUT SGND PGND SBD RFB2 GND GND Figure 1 TCV7106FN Application Circuit Example Component values (reference value@ VIN = 5V, VOUT = 3.3V, Ta = 25°C) CIN: Input filter capacitor = 10μF (ceramic capacitor: GRM21BB30J106K manufactured by Murata Manufacturing Co., Ltd, C2012X5R1C106M manufactured by TDK-EPC Corporation.) COUT: Output filter capacitor = 10μF (ceramic capacitor: GRM21BB30J106K manufactured by Murata Manufacturing Co., Ltd, C2012X5R1C106M manufactured by TDK-EPC Corporation.) RFB1: Output voltage setting resistor = 7.5kΩ RFB2: Output voltage setting resistor = 2.4kΩ L: Inductor = 4.7μH (CLF7045T-4R7N manufactured by TDK-EPC Corporation, D63CB #A916CY-4R7M manufactured by TOKO, INC.) SBD: Low-side Schottky barrier diode (Schottky barrier diode: CRS30I30A manufactured by Toshiba Corporation) CC is a decoupling capacitor of Input pin for the control section. (Connect it when the circuit operation is unstable due to the board layout or a feature of the CIN.) When merely synchronous mode (MODE=H) is applied, the SBD can be leaved out. Examples of Component Values (For Reference Only) Output Voltage Setting VOUT Inductance L Input Capacitance CIN Output Capacitance COUT Feedback Resistor RFB1 Feedback Resistor RFB2 1.0 V 4.7 μH 10 μF 40 μF 7.5 kΩ 30 kΩ 1.2 V 4.7 μH 10 μF 30 μF 7.5 kΩ 15 kΩ 1.51 V 4.7 μH 10 μF 30 μF 16 kΩ 18 kΩ 1.8 V 4.7 μH 10 μF 30 μF 15 kΩ 12 kΩ 2.5 V 4.7 μH 10 μF 20 μF 5.1 kΩ 2.4 kΩ 3.3 V 4.7 μH 10 μF 20 μF 7.5 kΩ 2.4 kΩ Component values need to be adjusted, depending on the TCV7106FN’s I/O conditions and the board layout. 5 2011-11-05 TCV7106FN Application Notes Inductor Selection The inductance required for inductor L can be calculated as follows: VIN: Input voltage (V) VIN − VOUT VOUT VOUT: Output voltage (V) ············· (1) L= ⋅ fOSC ⋅ ΔIL VIN fOSC: Oscillation frequency = 550 kHz (typ.) ΔIL: Inductor ripple current (A) *: Generally, ΔIL should be set to approximately 25% of the maximum output current. Since the maximum output current of the TCV7106FN is 2.5A, ΔIL should be 0.6A or so. The inductor should have a current rating greater than the peak output current of 2.8A. If the inductor current rating is exceeded, the inductor becomes saturated, leading to an unstable DC-DC converter operation. L= VIN − VOUT VOUT ⋅ fOSC ⋅ ΔIL VIN = 5 V − 3.3 V 3.3 V ⋅ 550kHz ⋅ 0.6A 5 V ΔIL When VIN = 5V and VOUT = 3.3V, the required inductance can be calculated as follows. Be sure to select an appropriate inductor, taking the input voltage range into account. IL 0 T= = 3.4μH V TON = Τ ⋅ OUT VIN 1 fOSC Figure 2 Inductor Current Waveform Setting the Output Voltage A resistive voltage divider is connected as shown in Figure 3 to set the output voltage; it is given by Equation 2 based on the reference voltage of the error amplifier (0.8V typ.), which is connected to the Feedback pin, VFB. RFB1 should be up to 30kΩ or so, because an extremely large-value RFB1 incurs a delay due to parasitic capacitance at the VFB pin. It is recommended that resistors with a precision of ±1% or higher be used for RFB1 and RFB2. ⎞ ⎟⎟ ⎠ LX VFB ⎛ R ⎞ = 0.8 V ⋅ ⎜⎜1 + FB1 ⎟⎟ ········ (2) ⎝ R FB2 ⎠ VOUT RFB2 RFB1 VOUT = VFB ⎛ R ⋅ ⎜⎜ 1 + FB1 R FB2 ⎝ Figure 3 Output Voltage Setting Resistors Rectifier Selection If non-synchronous (MODE=L) is selected, Low side MOSFET is always turned off, and this product can be used as DC-DC converter of the non-synchronous method. While non-synchronous mode is applied, connect the Schottky barrier diode as a rectifier between the LX and PGND pins. It is recommended CRS30I30A or equivalent be used as Schottky barrier diode. Power loss of a Schottky barrier diode tends to increase due to an increased reverse current caused by the rise in ambient temperature and self-heating due to a supplied current. The rated current should therefore be derated to allow for such conditions in selecting an appropriate diode. While fixed to synchronous mode (MODE=H), an external rectifier is not necessary. 6 2011-11-05 TCV7106FN Output Filter Capacitor Selection Use a low-ESR electrolytic or ceramic capacitor as the output filter capacitor. Since a capacitor is generally sensitive to temperature, choose one with excellent temperature characteristics. When the output voltage exceeds 2V, the capacitance should be 20μF or greater for applications. Meanwhile 30μF or greater capacitance is desirable when the output voltage is less than 2V. The capacitance should be set to an optimal value that meets the system’s ripple voltage requirement and transient load response characteristics. The phase margin tends to decrease as the output voltage is getting low. Enlarge a capacitance for output flatness when phase margin is insufficient, or the transient load response characteristics cannot be satisfied. Since the ceramic capacitor has a very low ESR value, it helps reduce the output ripple voltage; however, because the ceramic capacitor provides less phase margin, it should be thoroughly evaluated. Soft-Start Feature The TCV7106FN has a soft-start feature. The soft-start time, tSS, for VOUT defaults to 4.5ms (typ.) internally. The soft-start feature is activated when the TCV7106FN exits the undervoltage lockout (UVLO) state after power-up and when the voltage at the EN pin has changed from logic low to logic high. Mode Select Feature The TCV7106FN operation mode is switchable: synchronous (MODE=H) and non-synchronous (MODE=L). While non-synchronous mode is applied, connect external SBD as a low side element. The synchronous mode can achieve high efficiency at high load current. The non-synchronous mode can achieve higher efficiency than synchronous mode when the load current is less than 100mA; however, take into consideration the increase of the output ripple voltage. Switching function between synchronous and non-synchronous is possible at anytime, but fluctuation in output voltage occurs at the time of switching and it might be enlarged at low load current range where pulse-skip occurs. In that case a thorough evaluation is desirable to ascertain that the fluctuation range is within requirements. Over Current Protection The TCV7106FN has maximum current limiting. The TCV7106FN limits the ON time of high side switching transistor and decreases output voltage when the peak value of the Lx terminal current exceeds switching terminal peak current limitation ILIM1 = 3.3A(typ.)@ VIN = 4.3V / ILIM2 = 2.9A(typ.)@ VIN = 3.3V. When VIN≧ 4.3V, The TCV7106FN can operate at IOUT = 2.5A(max). Meanwhile, use it at IOUT = 2A(max) when VIN＜4.3V. Feedback pin Voltage Detection The TCV7106FN has the Feedback pin voltage detection. When the feedback pin voltage decrease and reaches VOLD = 0.36V (typ.), the TCV7106FN shuts off the power supply after 65μs(typ.) and suppresses the rise of the output voltage by ground fault of a feedback pin. When the decrease in the feedback pin voltage is detected when the overcurrent protection operates, the output voltage is stopped. The output voltage is not stopped by the feedback pin voltage detection while a soft start function is operating. For this reason, the supply of the output voltage is begun by the soft start operation after an enable pin or the input voltage is turned on. Undervoltage Lockout (UVLO) The TCV7106FN has undervoltage lockout (UVLO) protection circuitry. The TCV7106FN does not provide output voltage (VOUT) until the input voltage has reached VUVR = 2.55V (typ.). UVLO has hysteresis of 0.1V (typ.). After the switch turns on, if VIN2 drops below VUV = 2.45V (typ.), UVLO shuts off the switch at VOUT. Undervoltage lockout recovery voltage VUVR VIN2 Undervoltage lockout detection voltage VUV Hysteresis: ΔVUV GND Switching operation starts VOUT GND Switching operation stops Soft start Figure 4 Undervoltage Lockout Operation 7 2011-11-05 TCV7106FN Thermal Shutdown (TSD) The TCV7106FN provides thermal shutdown. When the junction temperature continues to rise and reaches TSD = 150°C (typ.), the TCV7106FN goes into thermal shutdown and shuts off the power supply. TSD has a hysteresis of about 15°C (typ.). The device is enabled again when the junction temperature has dropped by approximately 15°C from the TSD trip point. The device resumes the power supply when the soft-start circuit is activated upon recovery from TSD state. Thermal shutdown is intended to protect the device against abnormal system conditions. It should be ensured that the TSD circuit will not be activated during normal operation of the system. TSD detection temperature: TSD Recovery from TSD Hysteresis: ΔTSD Tj 0 Switching operation starts VOUT GND Switching operation stops Soft start Figure 5 Thermal Shutdown Operation Usage Precautions • The input voltage, output voltage, output current and temperature conditions should be considered when selecting capacitors, inductors and resistors. These components should be evaluated on an actual system prototype for best selection. • Parts of this product in the surrounding are examples of the representative, and the supply might become impossible. Please confirm latest information when using it. • External components such as capacitors, inductors and resistors should be placed as close to the TCV7106FN as possible. • The TCV7106FN has an ESD diode between the EN and VIN2 pins. The voltage between these pins should satisfy VEN − VIN2 < 0.3V. • CIN should be connected as close to the PGND and VIN1 pins as possible. Operation might become unstable due to board layout. In that case, add a decoupling capacitor (CC) of 0.1 μF to 1μF between the SGND and VIN2 pins. • The minimum programmable output voltage is 0.8V (typ.). If the difference between the input and output voltages is small, the output voltage might not be regulated accurately and fluctuate significantly. • When TCV7106FN is in operation, a negative voltage is generated since regeneration current flows through the switch pin (LX). Even if the current flows through the low side parasitic diode during the dead time of switching transistor, operation is undisturbed so an external flywheel diode is unnecessary. If there is the possibility of an external negative voltage generation, add a diode for protection. While non-synchronous mode is applied, connect external Schottky barrier diode as a low side element. • SGND pin is connected with the back of IC chip and serves as the heat radiation pin. Secure the area of a GND pattern as large as possible for greater of heat radiation. • The overcurrent protection circuits in the Product are designed to temporarily protect Product from minor overcurrent of brief duration. When the overcurrent protective function in the Product activates, immediately cease application of overcurrent to Product. Improper usage of Product, such as application of current to Product exceeding the absolute maximum ratings, could cause the overcurrent protection circuit not to operate properly and/or damage Product permanently even before the protection circuit starts to operate. • The thermal shutdown circuits in the Product are designed to temporarily protect Product from minor overheating of brief duration. When the overheating protective function in the Product activates, immediately correct the overheating situation. Improper usage of Product, such as the application of heat to Product exceeding the absolute maximum ratings, could cause the overheating protection circuit not to operate properly and/or damage Product permanently even before the protection circuit starts to operate. 8 2011-11-05 TCV7106FN Typical Performance Characteristics IIN – VIN (μA) 500 400 IIN 400 Operating current (μA) 500 Operating current 600 IIN IIN – Tj 600 300 200 100 VEN = VFB = VIN VMODE = VIN, Tj = 25°C 0 0 1 2 3 4 Input voltage 5 VIN 300 200 100 VEN = VIN = 5V VFB = VMODE = VIN 0 6 -50 (V) -25 0 25 50 Junction temperature VIH(EN), VIL(EN) – Tj Tj EN threshold voltage VIH(EN), VIL(EN) (V) EN threshold voltage VIH(EN), VIL(EN) (V) 1.5 VIH(EN) VIL(EN) 0.5 (°C) 1.5 VIH(EN) 1 VIL(EN) 0.5 0 0 -50 -25 0 25 75 50 Junction temperature Tj 100 -50 125 -25 0 25 50 Junction temperature (°C) IIH(EN) – VEN 75 Tj 100 125 (°C) IIH(EN) – Tj 20 20 VIN = 5.6V VIN = 5V VEN = 5V Tj = 25°C 16 EN input current IIH(EN) (μA) 16 EN input current IIH(EN) (μA) 125 VIN = 3.3V VIN = 5V 1 100 VIH(EN), VIL(EN) – Tj 2 2 75 12 8 12 8 4 4 0 0 0 1 2 3 EN input voltage 4 VEN 5 6 -50 -25 0 25 50 Junction temperature (V) 9 75 Tj 100 125 (°C) 2011-11-05 TCV7106FN VUV, VUVR – Tj VOUT – VIN 2.6 VOUT (V) Recovery voltage VUVR 2.5 Output voltage Under voltage lockout VUV,VUVR (V) 2 Detection voltage VUV 2.4 VEN = VIN VOUT = 1.2 V Tj = 25°C 1.5 1 0.5 VEN = VIN 2.3 0 -50 -25 0 25 50 Junction temperature 75 100 Tj 125 2.2 2.3 (°C) 2.4 Input voltage VIN 0.82 2.7 (V) VIN = 5V VOUT = 1.2V VEN = VIN (V) VEN = VIN VOUT = 1.2V Tj = 25°C (V) VFB 0.81 VFB input voltage VFB 2.6 VFB – Tj VFB – VIN 0.82 VFB input voltage 2.5 0.8 0.79 0.81 0.8 0.79 0.78 0.78 2 3 4 Input voltage 5 VIN -50 6 (V) -25 0 25 50 Junction temperature 75 Tj 100 125 (°C) ΔVOUT – VIN ΔVOUT (mV) 30 VOUT = 1.2V , IOUT = 0mA L = 4.7μH , COUT = 10μF ×3 Ta = 25°C 20 10 Output voltage 0 -10 -20 -30 2 3 4 Input voltage 5 VIN 6 (V) 10 2011-11-05 TCV7106FN fOSC - VIN fOSC - Tj 650 (kHz) Tj = 25°C fOSC 600 Oscillation frequency Oscillation frequency fOSC (kHz) 650 550 500 450 2 3 4 Input voltage 5 VIN 600 550 500 450 -50 6 -25 0 25 50 Junction temperature (V) Startup Characteristics (synchronous mode Soft-Start Time) VIN = 5V VOUT = 1.8V Ta = 25°C L = 4.7μH COUT = 10 μF×3 VMODE = 5V VIN = 5V 75 Tj 100 125 (°C) Startup Characteristics (non-synchronous mode Soft-Start Time) VIN = 5V VOUT = 1.8V Ta = 25°C L = 4.7μH COUT = 10 μF×3 VMODE = 0V Output voltage VOUT (1V/div) Output voltage VOUT (1V/div) EN voltage VEN:L→H ( 5V/div ) EN voltage VEN:L→H ( 5V/div ) 2ms/div 2ms/div 11 2011-11-05 TCV7106FN ΔVOUT – IOUT ( non-synchronous mode) -10 -20 -30 20 10 Output voltage 0 (mV) 30 VIN = 5V , VOUT = 3.3V L = 4.7μH , COUT = 10μF×2 VMODE = 0V , Ta = 25°C CRS30I30A ΔVOUT (mV) 10 Output voltage 20 ΔVOUT 30 ΔVOUT – IOUT ( non-synchronous mode) 0 0.5 1 1.5 Output current 2 IOUT (mV) 10 Output voltage 20 ΔVOUT (mV) ΔVOUT Output voltage -20 1.5 Output current IOUT -20 0 0.5 1 1.5 Output current 2 IOUT 2.5 (A) ΔVOUT – IOUT (synchronous mode) 30 VIN = 3.3V , VOUT = 1.2V VMODE = 5V , Ta = 25°C 20 10 Output voltage 0 (mV) L = 4,7μH , COUT = 10μF×3 ΔVOUT (mV) ΔVOUT Output voltage (A) -10 VIN = 5V , VOUT = 1.2V -10 -20 -30 IOUT 2.5 L = 4.7μH , COUT = 10μF×2 (A) 30 10 2 0 2 ΔVOUT – IOUT (synchronous mode) 20 1.5 VMODE = 5V , Ta = 25°C -30 1 1 VIN = 5V , VOUT = 3.3V -10 0.5 0.5 30 VIN = 3.3V , VOUT =1.2V L = 4.7μH , COUT =10μF×3 VMODE = 0V , Ta = 25°C CRS30I30A 0 0 ΔVOUT – IOUT (synchronous mode) 0 -30 -20 Output current 30 10 -10 (A) ΔVOUT – IOUT ( non-synchronous mode) 20 0 -30 2.5 VIN = 5V , VOUT =1.2V L =4.7μH , COUT =10 μF×3 VMODE = 0V , Ta = 25°C CRS30I30A L = 4,7μH , COUT = 10μF×3 VMODE = 3.3V , Ta = 25°C 0 -10 -20 -30 0 0.5 1 1.5 Output current 2 IOUT 2.5 0 0.5 1 Output current (A) 12 1.5 IOUT 2 (A) 2011-11-05 TCV7106FN Overcurrent Protection ( non-synchronous mode) 2 VIN = 5V , VOUT =1.2V L = 4.7μH , COUT =10μF ×3 VMODE = 0V , Ta = 25°C , CRS30I30A (V) VIN = 5V , VOUT =3.3V L = 4.7μH , COUT =10μF ×2 VMODE = 0V , Ta = 25°C , CRS30I30A VOUT 4 3 Output voltage Output voltage VOUT (V) 5 Overcurrent Protection ( non-synchronous mode) 2 1 1.5 1 0.5 0 0 1 2 3 Output current IOUT 1 4 (A) (V) VOUT 1.5 1 Output voltage Output voltage VOUT (V) 5 VIN = 3.3V , VOUT =1.2V L = 4.7μH , COUT =10μF ×3 VMODE = 0V , Ta = 25°C , CRS30I30A 0.5 IOUT (A) VIN = 5V , VOUT =3.3V L = 4.7μH , COUT =10μF ×2 VMODE = 5V , Ta = 25°C 4 3 2 1 0 1 2 3 Output current IOUT 4 1 2 2 3 Output current (A) Overcurrent Protection (synchronous mode) 4 IOUT (A) Overcurrent Protection (synchronous mode) 2 VIN = 3.3V , VOUT =1.2V L = 4.7μH , COUT =10μF ×3 VMODE = 3.3V , Ta = 25°C (V) VIN = 5V , VOUT =1.2V L = 4.7μH , COUT =10μF ×3 VMODE = 5V , Ta = 25°C VOUT 1.5 Output voltage VOUT (V) 4 Overcurrent Protection (synchronous mode) 0 Output voltage 3 Output current Overcurrent Protection ( non-synchronous mode) 2 2 1 0.5 0 1.5 1 0.5 0 1 2 Output current 3 IOUT 4 1 2 Output current (A) 13 3 IOUT 4 (A) 2011-11-05 TCV7106FN η – IOUT ( non-synchronous mode) η – IOUT ( non-synchronous mode) 100 80 80 VIN = 5V , VMODE = 0V VOUT = 3.3V L = 4.7μH, COUT = 10μF ×2 Ta = 25°C CRS30I30A 20 0 0.001 0.01 0.1 Output current 1 IOUT η 40 60 Efficiency η 60 Efficiency (%) (%) 100 40 VIN = 5V , VMODE = 0V VOUT = 1.2V L = 4.7μH, COUT = 10μF ×3 Ta = 25°C CRS30I30A 20 0 0.001 10 (A) 0.01 0.1 Output current 10 1 IOUT (A) η – IOUT (synchronous mode) η – IOUT ( non-synchronous mode) 100 80 80 VIN = 3.3V , VMODE = 0V VOUT = 1.2V L = 4.7μH, COUT = 10μF ×3 Ta = 25°C CRS30I30A 20 0 0.001 0.01 0.1 Output current 1 IOUT η 40 60 Efficiency η 60 Efficiency (%) (%) 100 40 VIN = 5V, VMODE = 5V VOUT = 3.3V L = 4.7μH, COUT = 10μF ×2 Ta = 25°C 20 0 0.001 10 (A) 0.01 0.1 Output current η – IOUT (synchronous mode) 100 80 80 IOUT 10 (A) η – IOUT (synchronous mode) η 60 η 60 Efficiency 40 Efficiency (%) (%) 100 1 40 VIN = 5V , VMODE = 5V VOUT = 1.2V L = 4.7μH, COUT = 10μF ×3 Ta = 25°C 20 0 0.001 0.01 0.1 Output current 1 IOUT VIN = 3.3V, VMODE = 3.3V VOUT = 1.2V L = 4.7μH, COUT = 10μF ×3 Ta = 25°C 20 0 0.001 10 (A) 0.01 0.1 Output current 14 1 IOUT 10 (A) 2011-11-05 TCV7106FN Load Response Characteristics (synchronous mode) Load Response Characteristics ( non-synchronous mode) VIN = 5V , VOUT = 1.8V , Ta = 25°C L = 4.7μH , COUT = 10μF ×3 VIN = 5V , VOUT = 1.8V , Ta = 25°C L = 4.7μH , COUT = 10μF ×3 Output voltage VOUT (100 mV/div) Output voltage VOUT (100 mV/div) Output current IOUT : (10mA→2A→10mA) Output current IOUT : (10mA→2A→10mA) 200 μs/div 200 μs/div Mode Switching IOUT=2A （non-synchronous→synchronous→non-synchronous） Mode Switching IOUT =100mA （non-synchronous→synchronous→non-synchronous） VIN = 5V , VOUT = 1.8V , IOUT = 2A Ta = 25°C , L = 4.7μH , COUT = 10μF ×3 VIN = 5V , VOUT = 1.8V , IOUT = 100mA Ta = 25°C , L = 4.7μH , COUT = 10μF ×3 Output voltage VOUT (50 mV/div) Output voltage VOUT (50 mV/div) MODE：L → H→L ( 5V/div ) MODE：L → H→L ( 5V/div ) 40 μs/div 40 μs/div Mode Switching IOUT =1.5mA （non-synchronous→synchronous） Mode Switching IOUT =1.5mA （synchronous→non-synchronous） VIN = 5V , VOUT = 1.8V , IOUT = 1.5mA Ta = 25°C , L = 4.7μH , COUT = 10μF ×3 VIN = 5V , VOUT = 1.8V , IOUT = 1.5mA Ta = 25°C , L = 4.7μH , COUT = 10μF ×3 Output voltage VOUT (50 mV/div) Output voltage VOUT (50 mV/div) MODE：L→H( 5V/div ) MODE：H → L( 5V/div ) 40 μs/div 200 μs /div 15 2011-11-05 TCV7106FN Package Dimensions Weight: 0.017g (typ.) 16 2011-11-05 TCV7106FN RESTRICTIONS ON PRODUCT USE • Toshiba Corporation, and its subsidiaries and affiliates (collectively “TOSHIBA”), reserve the right to make changes to the information in this document, and related hardware, software and systems (collectively “Product”) without notice. • This document and any information herein may not be reproduced without prior written permission from TOSHIBA. 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