TB7110F TOSHIBA BiCD Integrated Circuit Silicon Monolithic TB7110F Buck DC-DC Converter IC・Series Regulator IC The TB7110F is single chip power supply ICs that integrated buck DC-DC converter section utilizing a chopper circuit and series regulator section. The TB7110F contains high-speed P-channel MOSFETs for the high side main switch to achieve high efficiency. And series regulator section is fed into a overcurrent circuit of fold buck type, and it protects this product from the short circuit state of the load. HSON8-P-0505-1.27 Features Weight: 0.068 g (typ.) • Output current: DC-DC Converter section IOUT1 = 1.5A(max.) Series Regulator section IOUT2 = 800mA(max.) • High efficiency: DC-DC Converter section η = 86% (typ.) (@VIN1 = 24V, VOUT1 = 5V, IOUT1 = 500mA) • Operating input voltage range: VIN1 = 4.5V to 27V • On-state resistance: RDS(ON) = 0.7Ω (high-side) typical (@VIN1 = 24V, Tj = 25℃) • Oscillation frequency: fOSC = 500kHz (typ.) • Reference voltage: VREF = 1.215V ± 2.9% (@Tj = 25°C) • Housed in a small surface-mount package (SOP Advance) with a low thermal resistance • Soft-start feature • Overcurrent protection: fold buck type for the Series Regulator section ILMIT2(1) = 1.2A(typ.)(@ VIN2 = 6V, VOUT2 = 4.5V), ILMIT2(2) = 200mA(typ.)(@ VIN2 = 6V, VOUT2 = 0V) Part Marking Pin Assignment Part Number (or abbreviation code) TB 7110F VFB1 EN 8 7 VFB2 6 VOUT2 5 Lot No. The dot (•) on the top surface indicates pin 1. 1 2 3 4 Lx VIN1 VIN2 GND 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) 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 (1) to avoid such overloads upon the Product, and (2) 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 2011-05-19 TB7110F Ordering Information Part Number Shipping TB7110F (TE12L, Q) Embossed tape (3000 units per reel) Block Diagram VIN1 Current Detection Slope Oscillator Compensation Under Voltage Lockout Control Logic + - Driver LX Short-Circuit Error Amplifier - VFB1 + Protection Phase Compensation Current Detection + - Soft Start EN Ref.Voltage (1.215V) VIN2 + Error Amplifier VOUT2 VFB2 GND Pin Description Pin No. Symbol Description 1 LX 2 VIN1 This pin is placed in the standby state if VEN=”L”. Standby current is 70 μA(@VIN = 24V) or less. 3 VIN2 Input pin for the Series Regulator section. It uses on the condition of VIN1≧VIN2. 4 GND Ground pin 5 VOUT2 6 VFB2 Switch pin This pin is connected to high-side P-channel MOSFET. Input pin Output pin for the Series Regulator section Feedback pin for the Series Regulator section This input is fed into an internal error amplifier with a reference voltage of 1.215 V (typ.). Enable pin 7 EN When VEN ≥ 1.8V (@ VIN1 = 24V), the internal circuitry is allowed to operate and thus enable the switching operation of the output section. When VEN ≤ 0.5V (@ VIN1 = 24V), the internal circuitry is disabled, putting the TB7110F in Standby mode. This pin has an internal pull-up current of 3.5µA(typ.). 8 VFB1 Feedback pin for the DC-DC Converter section This input is fed into an internal error amplifier with a reference voltage of 1.215 V (typ.). 2 2011-05-19 TB7110F Absolute Maximum Ratings (Ta = 25°C) (Note) Characteristics Symbol Rating Unit Input pin voltage VIN1 -0.3 to 30 V Input pin voltage VIN2 -0.3 to 30 V VLX -0.3 to 30 V Feedback1 pin voltage VFB1 -0.3 to 30 V Feedback2 pin voltage VFB2 -0.3 to 30 V Enable pin voltage VEN -0.3 to 30 V Switch pin current ILX -1.8 A Output pin current IOUT2 -0.8 A PD 2.2 W Tjopr -40 to 125 ℃ Tj 150 °C Tstg -55 to 150 °C Switch pin voltage Power dissipation (Note 1) (Note 2) Operating junction temperature Junction temperature (Note 3) Storage temperature Thermal Resistance Characteristics Characteristics Symbol Max Unit Thermal resistance, junction to ambient Rth (j-a) 44.6 (Note 2) °C/W Thermal resistance, junction to case (Tc=25℃) Rth (j-c) 4.17 °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: The switch pin voltage (VLX) doesn’t include the peak voltage generated by TB7110F’s switching. A negative voltage generated in dead time is permitted among the switch pin current (ILX). Note 2: Glass epoxy board FR-4 25.4 × 25.4 × 0.8 (Unit: mm) Single-pulse measurement: pulse width t=10(s) Note 3: The TB7110F may go 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 2011-05-19 TB7110F Electrical Characteristics (Tj = 25°C, VIN1 = VIN2 = 4.5V to 27V, unless otherwise specified) Characteristics Symbol Test Condition Min Typ. Max Unit VIN1(OPR) ⎯ 4.5 ⎯ 27 V ⎯ ⎯ 5 mA ⎯ ⎯ 70 μA VIN1 = 24V 1.8 ⎯ ⎯ VIL(EN) VIN1 = 24V ⎯ ⎯ 0.5 IIH(EN) VIN1 = 24V, VEN = 5V −5 ⎯ 5 IIL(EN) VIN1 = 24V, VEN = 0V ⎯ −3.5 ⎯ TSD VIN1 = 24V , VEN = 5V ⎯ 155 ⎯ °C Hysteresis ΔTSD VIN1 = 24V , VEN = 5V ⎯ 10 ⎯ °C Detection voltage VUV VEN = 5V 3.2 3.7 4.2 V Recovery voltage VUVR VEN = 5V 3.5 4.0 4.5 V Hysteresis ΔVUV VEN = 5V ⎯ 0.3 ⎯ V VIN1 = 24V , VEN = 5V, IOUT1 = 0A Measured between 0% and 90% 1.2 2.5 4 ms Operating input voltage Operating current IIN1 Standby current IIN1(STBY) VIH(EN) EN threshold voltage EN input current Thermal shutdown (TSD) Undervoltage lockout (UVLO) Detection temperature Internal soft-start time tSS VIN1 = 24V , VEN = 5V VFB1 = 2V VIN1 = 24V , VEN = 0V VFB1 = 0.8V V μA points at VOUT1 Reference voltage VREF VIN1 = 24V , VEN = 5V 1.18 1.215 1.25 V VFB input voltage VFB1 VIN1 = 24V , VEN = 5V ⎯ 1.215 ⎯ V VFB input current IFB1 -1 ⎯ 1 μA 1.215 ⎯ VIN1-3 V ⎯ ⎯ 10 μA ⎯ 0.7 ⎯ Ω DC-DC Converter section Output voltage range High-side switch leakage current High-side switch on-state resistance VIN1 = 24V , VEN = 5V VFB1 = 2V VOUT1(OPR) VEN = VIN1 ILEAK (H) RDS(ON)(H) VIN1 = 24V, VEN = 0V VFB1 = 0.8V, VLX = 0V VIN1 = 24V , VEN = 5V ILX = - 0.1A Oscillation frequency fOSC VIN1 = 24V , VEN = 5V 400 500 600 kHz High-side switch duty cycle Dmax VIN1 = 24V , VEN = 5V ⎯ ⎯ 100 % LX current limit ILIM1 1.8 3 ⎯ A ⎯ 1.215 ⎯ V -5 ⎯ -5 μA ⎯ ⎯ 50 mV 0.8 1.2 ⎯ A ⎯ 200 ⎯ mA VIN1 = 24V , VEN = 5V VOUT1 = 5V Series Regulator section VFB input voltage VFB2 VFB input current IFB2 Load regulation Reg・Load ILIM2(1) VOUT2 current limit ILIM2(2) VIN1 = 24V , VEN = 5V VIN1 = 24V , VIN2 = 6V VFB2 = 2V, VEN = 5V VIN1 = 24V, VIN2 = 6V, VOUT2 = 5V IOUT2 = 5mA to 800mA VIN1 = 24V , VIN2 = 6V VFB2 = 1V , VOUT2 = 4.5V VIN1 = 24V , VIN2 = 6V VFB2 = 0V , VOUT2 = 0V 4 2011-05-19 TB7110F Application Circuit Example 1 ・DC-DC Converter＋Series Regulator VIN L VOUT1 VIN2 Lx VOUT2 VIN1 VFB1 TB7110F EN EN VOUT2 RFB1 RFB3 VFB2 CIN GND SBD COUT1 COUT2 RFB2 RFB4 GND GND Component values (reference value@ VIN1 = 24V, VOUT1 = 5V, VOUT2 = 3.3V, Ta = 25°C) CIN : VIN1 Input filter capacitor = 4.7μF (ceramic capacitor: GRM31CR71H475KA12L manufactured by Murata Manufacturing Co., Ltd.) COUT1 : VOUT1 Output filter capacitor = 22μF (ceramic capacitor: GRM31CB31C226ME15L manufactured by Murata Manufacturing Co., Ltd.) C OUT2 : VOUT2 Output capacitor = 4.7μF (ceramic capacitor: GRM31CR71H475KA12L manufactured by Murata Manufacturing Co., Ltd.) RFB1 : Output voltage setting resistor for the DC-DC converter section = 4.7kΩ RFB2 : Output voltage setting resistor for the DC-DC converter section = 1.5kΩ RFB3 : Output voltage setting resistor for the Series regulator section = 4.7kΩ RFB4 : Output voltage setting resistor for the Series regulator section = 2.7kΩ L : Inductor = 15μH(CLF7045T-150M manufactured by TDK-EPC Corporation) SBD : Schottky barrier diode(CRS20I40B manufactured by Toshiba Corporation) Application Circuit Example 2 ・DC-DC Converter VIN VOUT1 L Lx VIN2 VOUT2 VIN1 VFB1 TB7110F EN RFB1 EN VFB2 CIN SBD GND COUT1 RFB2 GND GND Component values (reference value@ VIN1 = 24V, VOUT1 = 5V, Ta = 25°C) CIN : VIN1 Input filter capacitor = 4.7μF (ceramic capacitor: GRM31CR71H475KA12L manufactured by Murata Manufacturing Co., Ltd.) COUT1 : VOUT1 Output filter capacitor = 22μF (ceramic capacitor: GRM31CB31C226ME15L manufactured by Murata Manufacturing Co., Ltd.) RFB1 : Output voltage setting resistor for the DC-DC converter section = 4.7kΩ RFB2 : Output voltage setting resistor for the DC-DC converter section = 1.5kΩ L : Inductor = 15μH(CLF7045T-150M manufactured by TDK-EPC Corporation) SBD : Schottky barrier diode(CRS20I40B manufactured by Toshiba Corporation) Figure 1 TB7110F Application Circuit Examples 5 2011-05-19 TB7110F Application Notes DC-DC Converter section Inductor Selection The inductance required for inductor L can be calculated as follows: VIN1: Input voltage (V) VIN1 − VOUT1 VOUT1 VOUT1: Output voltage (V) L= ⋅ ·············· (1) fOSC ⋅ΔIL VIN1 fOSC: Oscillation frequency = 500kHz (typ.) ΔIL: Inductor ripple current (A) *: Generally, ΔIL should be set to approximately 30% of the maximum output current. Since the maximum output current of the TB7110F is 1.5A, ΔIL should be 0.5A or so. The inductor should have a current rating greater than the peak output current of 1.75A. If the inductor current rating is exceeded, the inductor becomes saturated, leading to an unstable DC-DC converter operation. L= = VIN1 − VOUT1 VOUT1 ⋅ fOSC ⋅ΔIL VIN1 24V − 5 V 5V ⋅ 500kHz ⋅ 0.5A 24 V ΔIL When VIN1 = 24V and VOUT1 = 5V, 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= = 15.8 μH 1 TON = T ⋅ fosc VOUT1 VIN1 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 (1.215V typ.), which is connected to the Feedback pin, VFB. RFB2 should be up to 10kΩ or so, because an extremely large-value RFB2 incurs a delay due to parasitic capacitance at the VFB1 pin. It is recommended that resistors with a precision of ±1% or higher be used for RFB1 and RFB2. VFB1 ⎛ R ⎞ = 1.215 V × ⎜⎜1 + FB1 ⎟⎟ ···· (2) ⎝ R FB2 ⎠ VOUT1 RFB2 RFB1 LX ⎞ ⎛ R VOUT1 = VFB1 × ⎜⎜1 + FB1 ⎟⎟ R FB2 ⎠ ⎝ Figure 3 Output Voltage Setting Resistors 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. The capacitance should be set to an optimal value that meets the system’s ripple voltage requirement and transient load response characteristics. Rectifier Selection A Schottky barrier diode should be externally connected to the TB7110F as a rectifier between the LX and GND pins. It is recommended CRS20I40B or equivalent be used as the Schottky barrier diode. If a large voltage overshoot is on the LX pin, it reduces the voltage to connect a series CR network consisting of a resistor of RS = 47Ω and a capacitor of CS = 330pF with the Schottky barrier diode in parallel. Power loss of the 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. 6 2011-05-19 TB7110F Overcurrent Protection（OCP） The TB7110F has built-in overcurrent protection with pulse skip. When the peak current of LX pin exceeds ILIM1=3.0A(typ.)(@VIN1=24V), the ON time of the high-side switch (internal) will be limited. Switching frequency will be reduced and output current will be restricted further if output voltage falls and the voltage of VFB1 pin drops below the overcurrent pulse skip detection voltage VLOC (0.5V typ.) during overcurrent protection . Series Regulator section Overcurrent Protection（OCP） TB7110F is fed into a overcurrent circuit of fold buck type, and it protects this product from the overcurrent state of the load. VOUT2 5V 4.5V 0 ILIM2(2) ILIM2(1) 200mA(typ) 1.2A(typ) IOUT2 Figure 4 Overcurrent Protection Operation Setting the Output Voltage ⎛ R VOUT2 = VFB2 × ⎜⎜ 1 + FB3 R FB4 ⎝ ⎞ ⎟⎟ ⎠ VOUT2 ⎛ ⎞ ⎜ R FB3 ⎟ ······ (3) = 1.215 V × ⎜1 + ⎟ ⎜ R FB4 ⎟ ⎝ ⎠ VFB2 RFB4 RFB3 A resistive voltage divider is connected as shown in Figure 5 to set the output voltage; it is given by Equation 3 based on the reference voltage of the error amplifier (1.215V typ.), which is connected to the Feedback pin, VFB2. RFB4 should be up to 10kΩ or so, because an extremely large-value RFB4 incurs a delay due to parasitic capacitance at the VFB2 pin. It is recommended that resistors with a precision of ±1% or higher be used for RFB3 and RFB4. Please make a set voltage of VOUT2 VIN1- 3V or less. Figure 5 Output Voltage Setting Resistors Output Filter Capacitor Selection Use a ceramic capacitor as the output filter capacitor. As a rule of thumb, its capacitance should be 4.7μF or greater. Since a capacitor is generally sensitive to temperature, choose one with excellent temperature characteristics. The IC may oscillate due to external conditions (output current, or temperature etc.). The type of capacitor required must be determined by the actual application circuit in which the IC is used. 7 2011-05-19 TB7110F Dropout Voltage If the voltage difference becomes small between input pin (VIN2) and output pin (VOUT2) of the series regulator section, the output voltage might decrease and the load regulation characteristics deteriorate. If you obtain an excellent load regulation characteristic, please you use the condition of becoming a potential difference that is bigger than the dropout voltage shown in Figure 6. IOUT2 – (VIN2 - VOUT2) Output current IOUT2 (A) 1.0 0.8 Tj=25°C Tj=125°C 0.6 0.4 0.2 0 0 0.5 1.0 Dropout voltage 1.5 2.0 2.5 VIN2 - VOUT2 (V) Figure 6 Dropout voltage 8 2011-05-19 TB7110F Note on Electrical Characteristics Soft-Start Feature The TB7110F has a soft-start feature. The soft-start time, tSS for VOUT1 and VOUT2 defaults to 2.5ms (typ.) internally. The soft-start feature is activated when the TB7110F 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. Thermal Shutdown (TSD) The TB7110F provides thermal shutdown. When the junction temperature continues to rise and reaches TSD (155°C typ.), the TB7110F goes into thermal shutdown and shuts off the power supply. TSD has a hysteresis of about 10°C (typ.). The device is enabled again when the junction temperature has dropped by approximately 10°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 VOUT1 VOUT2 GND Switching operation stops Soft start Figure 7 Thermal Shutdown Operation Undervoltage Lockout (UVLO) The TB7110F has undervoltage lockout (UVLO) protection circuitry. The TB7110F does not provide output voltage (VOUT1 and VOUT2) until the input voltage (VIN1) has reached VUVR (4.0V typ.). UVLO has hysteresis of 0.3V (typ.). After the switch turns on, if VIN1 drops below VUV (3.7V typ.), UVLO shuts off the switch at VOUT1 and VOUT2. Undervoltage lockout recovery voltage VUVR VIN1 Undervoltage lockout detection voltage VUV Hysteresis: ΔVUV GND Switching operation starts VOUT1 VOUT2 GND Switching operation stops Soft start Figure 8 Undervoltage Lockout Operation 9 2011-05-19 TB7110F 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 TB7110F as possible. • CIN should be connected as close to the GND and VIN1 pins as possible. Operation might become unstable due to a board layout and a characteristics of capacitance. • The minimum programmable output voltage is 1.215V (typ.). If the difference between the input and output voltages is small, the output voltage might not be regulated accurately and fluctuate significantly. • GND(4) 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. 10 2011-05-19 TB7110F Typical Performance Characteristics IIN1 – VIN1 IIN1 – Tj IIN1 (mA) 2.0 1.5 Operating current Operating current IIN1 (mA) 2.0 1 0.5 VEN = VIN1 VFB1 = 2V, VFB2 = 0V Tj = 25°C 0 0 5 15 20 Input voltage VIN1 10 25 1.5 1 0.5 VEN = VIN1 = 24V VFB1 = VFB2 = 0V 0 30 -50 (V) -25 0 25 50 75 Junction temperature Tj 100 125 (°C) IIH(EN) – VEN VIH(EN), VIL(EN) – Tj 2 2.0 0 1.5 VIH(EN) EN input current IIH(EN) (μA) EN threshold voltage VIH(EN), VIL(EN) (V) VIN1 = 24V VFB1 = 0V 1 VIL(EN) -2 -4 0.5 VIN1 = VIN2 = 24V VFB1 = VFB2 = 0V Tj = 25°C -6 0 -50 0 -25 25 50 75 Junction temperature Tj 100 0 125 5 10 15 EN input voltage (°C) 25 20 VEN 30 (V) VUV, VUVR – Tj VOUT2 – VIN1 5.0 1.5 Undervoltage lockout voltage VUV,VUVR (V) Output voltage VOUT2 (V) VEN = VIN1 = 24V 1.2 0.9 0.6 VIN1 = VIN2 VEN = VIN1 VFB1 = 0V VFB2 = VOUT2 Tj = 25°C 0.3 0 VFB1 = 0V 4.5 Recovery voltage VUVR 4.0 Detection voltage VUV 3.5 3.0 3 3.4 3.8 Input voltage 4.2 VIN1 4.6 -50 5 -25 0 25 50 Junction temperature (V) 11 75 Tj 100 125 (°C) 2011-05-19 TB7110F VFB2 – VIN1 VFB2 – Tj 1.22 1.20 1.18 1.16 (V) VIN1 = VIN2 VEN = VIN1 Tj = 25°C 1.26 VFB2 1.28 1.24 Feedback pin voltage (V) 1.24 Feedback pin voltage 1.26 VFB2 1.28 VIN1 = VIN2 = 24V VEN = VIN1 1.22 1.20 1.18 1.16 0 5 10 20 15 Input voltage VIN1 25 -50 30 -25 (V) 0 fOSC – VIN1 75 Tj 100 125 (°C) fOSC – Tj 560 VIN1 = 24V (kHz) (kHz) fOSC 520 Oscillation frequency fOSC 50 Junction temperature 560 Oscillation frequency 25 480 440 Tj = 25°C 400 520 480 440 400 0 5 10 15 Input voltage 20 VIN1 25 30 -50 (V) -25 0 25 50 Junction temperature 12 75 Tj 100 125 (°C) 2011-05-19 TB7110F Overcurrent Protection (DC-DC Converter section) 6 5 5 VOUT1 (V) 6 4 3 2 VIN1 = 8V VOUT1 = 5V L = 15μH Ta = 25°C 1 4 3 Output voltage Output voltage VOUT1 (V) Overcurrent Protection (DC-DC Converter section) 2 VIN1 = 12V VOUT1 = 5V L = 15μH Ta = 25°C 1 0 0 0 1 2 Output current 3 IOUT1 4 0 1 (A) 6 5 5 VOUT1 (V) 6 4 3 4 (A) 2 VIN1 = 24V VOUT1 = 5V L = 15μH Ta = 25°C 4 3 2 VIN1 = 8V VOUT1 = 3.3V L = 15μH Ta = 25°C 1 0 0 0 1 2 Output current 3 IOUT1 4 0 (A) 3 Output current IOUT1 4 (A) 6 (V) 5 (V) 5 VOUT1 4 VOUT1 Overcurrent Protection (DC-DC Converter section) 6 Output voltage 3 2 VIN1 = 12V VOUT1 = 3.3V L = 15μH Ta = 25°C 1 2 1 Overcurrent Protection (DC-DC Converter section) Output voltage 3 IOUT1 Overcurrent Protection (DC-DC Converter section) Output voltage Output voltage VOUT1 (V) Overcurrent Protection (DC-DC Converter section) 1 2 Output current 0 4 3 2 VIN1 = 24V VOUT1 = 3.3V L = 15μH Ta = 25°C 1 0 0 1 2 Output current 3 IOUT1 4 0 (A) 1 2 Output current 13 3 IOUT1 4 (A) 2011-05-19 TB7110F ΔVOUT1 – IOUT1 (DC-DC Converter section) ΔVOUT1 – IOUT1 (DC-DC Converter section) 100 100 50 ΔVOUT1 0 Output voltage ΔVOUT1 50 Output voltage VIN1 = 12V , VOUT1= 5V L = 15μH , COUT1 = 22μF Ta = 25°C , LS : CRS20I40B (mV) (mV) VIN1 = 8V , VOUT1= 5V L = 15μH , COUT1 = 22μF Ta = 25°C , LS : CRS20I40B -50 -100 0 -50 -100 0 0.3 0.6 Output current 0.9 1.2 IOUT1 (A) 0 1.5 (mV) ΔVOUT1 0 -50 0.9 1.2 0 IOUT1 -100 1.5 (A) 0.9 IOUT1 1.2 1.5 (A) 100 0 (mV) 50 -50 0 0.3 0.6 Output current 0.9 IOUT1 1.2 VIN1 =24V , VOUT1 = 3.3V L = 15μH , COUT1 = 22μF Ta = 25°C , LS : CRS20I40B 50 ΔVOUT1 VIN1 =12V , VOUT1 = 3.3V L = 15μH , COUT1 = 22μF Ta = 25°C , LS : CRS20I40B 0 Output voltage (mV) ΔVOUT1 0.6 ΔVOUT1 – IOUT1 (DC-DC Converter section) 100 Output voltage 0.3 Output current ΔVOUT1 – IOUT1 (DC-DC Converter section) -100 (A) -50 0 Output current IOUT1 1.5 VIN1 =8V , VOUT1 = 3.3V L = 15μH , COUT1 = 22μF Ta = 25°C , LS : CRS20I40B 50 Output voltage (mV) Output voltage ΔVOUT1 50 0.6 1.2 100 VIN1 = 24V , VOUT1 = 5V L = 15μH , COUT1 = 22μF Ta = 25°C , LS : CRS20I40B 0.3 0.9 ΔVOUT1 – IOUT1 (DC-DC Converter section) 100 0 0.6 Output current ΔVOUT1 – IOUT1 (DC-DC Converter section) -100 0.3 -50 -100 1.5 (A) 0 0.3 0.6 Output current 14 0.9 1.2 IOUT1 (A) 1.5 2011-05-19 TB7110F η – IOUT1 η – IOUT1 90 90 VIN1 = 8V VOUT1 = 5V L = 15μH COUT1 = 22μF Ta = 25°C LS : CRS20I40B 60 50 0 0.3 0.6 Output current 0.9 1.2 IOUT1 η 70 80 Efficiency η 80 Efficiency (%) 100 (%) 100 70 VIN1 = 12V VOUT1 = 5V L = 15μH COUT1 = 22μF Ta = 25°C LS : CRS20I40B 60 50 1.5 0 (A) 0.3 0.6 Output current η – IOUT1 0.9 1.2 IOUT1 1.5 (A) η – IOUT1 100 90 90 VIN1 = 24V VOUT1 = 5V L = 15μH COUT1 = 22μF Ta = 25°C LS : CRS20I40B 60 50 0 0.3 0.6 Output current 0.9 1.2 IOUT1 η 70 80 Efficiency η 80 Efficiency (%) (%) 100 70 VIN1 = 8V VOUT1 =3.3V L = 15μH COUT1 = 22μF Ta = 25°C LS : CRS20I40B 60 50 1.5 0 (A) 0.3 0.6 Output current η – IOUT1 0.9 1.2 IOUT1 1.5 (A) η – IOUT1 100 90 90 VIN1 = 12V VOUT1 = 3.3V L = 15μH COUT1= 22μF Ta = 25°C LS : CRS20I40B 60 50 0 0.3 0.6 Output current 0.9 IOUT1 1.2 η 70 80 Efficiency η 80 Efficiency (%) (%) 100 70 VIN1 = 24V VOUT1 = 3.3V L = 15μH COUT1 = 22μF Ta = 25°C LS : CRS20I40B 60 50 1.5 (A) 0 0.3 0.6 Output current 15 0.9 IOUT1 1.2 1.5 (A) 2011-05-19 TB7110F ΔVOUT2 – IOUT2 (Series regulator section) Overcurrent Protection (Series regulator section) 6 100 VIN2 = 5V , VOUT2 = 3.3V Ta = 25°C (mV) 5 VOUT2 = 3.3V Ta = 25°C ΔVOUT2 50 4 3 Output voltage Output voltage VOUT2 (V) VIN2 = 5V 2 1 0 -50 -100 0 0 0.5 1 Output current 1.5 IOUT2 2 0 (A) (dB) R.R Ripple rejection (dB) R.R Ripple rejection 40 20 10 100 1k Frequency f 10k IOUT2 0.8 (A) 100 60 0 0.6 Ripple rejection (Series regulator section) VIN1 = VIN2 = 12V VOUT2 = 3.3V IOUT2 = 50mA Ta = 25°C 80 0.4 Output current Ripple rejection (Series regulator section) 100 0.2 80 VIN1 = 24V 60 VIN1 = 12V 40 0 100k (Hz) VIN2 = 5V VOUT2 = 3.3V IOUT2 = 50mA Ta = 25°C 20 10 100 1k Frequency f 10k 100k (Hz) Startup Characteristics (Internal Soft-Start Time) VIN1 = 24V VOUT1 = 5V VOUT2 = 3.3V Ta = 25°C L = 15μH Output voltage : VOUT1 (2V/div) Output voltage : VOUT2 (2V/div) EN input voltage:VEN:L→H 1 ms/div 16 2011-05-19 TB7110F Package Dimensions HSON8-P-0505-1.27 Unit: mm Weight: 0.068 g (typ.) 17 2011-05-19 TB7110F 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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