ACT4524 Rev 1.1, 22-Feb-16 40V/3.5A Buck Converter with Dual Output and Separated Over Current Protection GENERAL DESCRIPTION FEATURES ACT4524 is a wide input voltage, high efficiency step-down DC/DC converter that operates in either CV (Constant Output Voltage) mode or CC (Constant Output Current) mode. ACT4524 has separated output current limits for dual ports CLA application. With the separated current limits, the CLA can meet Apple’s MFI standard. 40V Input Voltage Surge 4.5V-36V operational Input Voltage Dual 5.1V Outputs with 1% Accuracy Up to 3.5A Output Current 2.65A Constant Current Regulation for VOUT1 1.2A Constant Current Regulation for VOUT2 Hiccup Mode Protection at Output Short >90% Efficiency at Full Load <0.5mA Low Standby Input Current 5.7V Output Over Voltage Protection Cord Voltage Drop Compensation Meet EN55022 Class B Radiated EMI Standard SOP-8EP Package ACT4524 provides up to 3.5A output current at 125kHz switching frequency. ACT4524 utilizes adaptive drive technique to achieve good EMI performance while maintain 90% efficiency at full load for mini size CLA designs. ACT4524 also has built in hiccup mode output short circuit protection. The average output current is reduced to below 6mA when output is shorted to ground. Other features include output over voltage protection and thermal shutdown. ACT4524 is available in a SOP-8EP package and require very few external components for operation. APPLICATIONS Car Charger Cigarette Lighter Adaptor (CLA) Rechargeable Portable Device CV/CC regulation DC/DC converter Output VI Profile Typical Application Circuit Vout1 5.25V 5.10V Rcs2 50m R1 0Ω CSN2 CSN1 HSB SW 6.0V to 36V IN ACT4524 C4 22nF L1 33µ H CSP GND C1 47µ F C2 0.1µ F C3 10µ F 5.10V/2.4A CLK MODE R2 5.1Ω C5 2.2nF 4.6V Rcs1 25m Vout1 D1 S54 C6 10µ F C7 220uF C8 2.2µ F 5.10V/1.0A 2.50V Iout1 Vout2 C9 2.2µ F 2.4A 2.9A Vout2 5.25V 5.10V 4.75V 2.50V Iout2 1.1A Innovative PowerTM -1- 1.3A www.active-semi.com Copyright © 2015 Active-Semi, Inc. ACT4524 Rev 1.1, 22-Feb-16 ORDERING INFORMATION PART NUMBER OPERATION AMBIENT TEMPERATURE RANGE PACKAGE PINS PACKING ACT4524YH-T -40°C to 85°C SOP-8EP 8 TAPE & REEL PIN CONFIGURATION CSP 1 8 HSB CSN1 2 7 SW 6 IN 5 CLK ACT4524 CSN2 3 MODE 4 GND EP SOP-8EP Top View PIN DESCRIPTIONS PIN NAME DESCRIPTION 1 CSP Voltage Feedback Input. The voltage at this pin is regulated to 5.10V. Connect this pin to the positive terminal of current sense resistor. CSP, CSN1 and CSN2 Kevin sense is recommended. 2 CSN1 Output current sense. Connect to the negative terminal of current sense resistor for VOUT1. 3 CSN2 Output current sense. Connect to the negative terminal of current sense resistor for VOUT2. 4 Mode pin with internal pull up current to determine device should operate in Native, Master, or Slave mode. If the pin is floated, the device operates in native mode; if the pin MODE is grounded ,the device operates in Slave mode and receives CLK signal from another device; if the pin is connected to 82kOhm resistor, the device is configured in Master mode. 5 CLK Synchronization of dual chips. Two chips operate synchronously out of phase with CLK pin connected. 6 IN Power Supply Input. Bypass this pin with a 10μF ceramic capacitor to GND, placed as close to the IC as possible. 7 SW Power switching output to external inductor. 8 HSB High Side Bias pin. This pin provides power to the internal high-side MOSFET gate driver. Connect a 22nF capacitor from HSB pin to SW pin. 9 GND Ground and heat dissipation pad. Connect this exposed pad to large ground copper area and other ground planes by thermal vias. Innovative PowerTM -2- www.active-semi.com Copyright © 2015 Active-Semi, Inc. ACT4524 Rev 1.1, 22-Feb-16 ABSOLUTE MAXIMUM RATINGS PARAMETER VALUE UNIT -0.3 to 40 V SW to GND -1 to VIN + 1 V HSB to GND VSW - 0.3 to VSW + 7 V -0.3 to + 6 V 46 °C/W Operating Junction Temperature -40 to 150 °C Storage Junction Temperature -55 to 150 °C 300 °C IN to GND CSP, CS1, CS2, CLK, MODE to GND Junction to Ambient Thermal Resistance Lead Temperature (Soldering 10 sec.) : Do not exceed these limits to prevent damage to the device. Exposure to absolute maximum rating conditions for long periods may affect device reliability. Innovative PowerTM -3- www.active-semi.com Copyright © 2015 Active-Semi, Inc. ACT4524 Rev 1.1, 22-Feb-16 ELECTRICAL CHARACTERISTICS (VIN = 12V, TA = 25°C, unless otherwise specified.) Parameter Input over voltage protection Symbol Condition Min Typ Max Units VIN_OVP Rising 40 42 44 V Input under voltage lockout (UVLO) VIN Rising 4.15 4.5 4.75 V Input UVLO hysteresis VIN Output voltage regulation CSP 300 5.05 Output voltage cord compensation RCS1=25mΩ,Output current 2.4A Cord Compensation Factor K factor Output over voltage protection Output over voltage protection hysteresis VOUT falling UVP hysteresis VOUT VOUT rising V mV 1.667 Output over voltage deglitch time VOUT 5.15 100 5.5 Output under voltage protection (UVP) 5.10 mV 2.25 UVP hiccup time UVP blanking time at startup 5.7 6.0 V 500 ns 0.3 V 2.50 2.75 V 0.2 V 4 s 3.5 ms Output constant current limit CS1 Rcs=25mΩ 2.50 2.65 2.80 A Output constant current limit CS2 Rcs=50mΩ 1.1 1.2 1.3 A Maximum duty cycle 99 % Soft-start time 2.0 ms 80 mV Thermal shut down 160 °C Thermal shut down hysteresis 30 °C 2.0 kV Out voltage ripples ESD on CSP, CSN1, CSN2 Innovative PowerTM Cout=470uF//22uF ceramic HBM -4- www.active-semi.com Copyright © 2015 Active-Semi, Inc. ACT4524 Rev 1.1, 22-Feb-16 FUNCTIONAL BLOCK DIAGRAM HSB VIN PWM Controller UVLO 70mΩ CLK Driver SW MODE OVP Current Sense and Control CSP CSN1 4.7Ω CSN2 GND FUNCTIONAL DESCRIPTION converter goes into hiccup mode by disabling the converter and restarts in 4 seconds and restarts. Output Current Sensing and Regulation The conventional cycle-by-cycle peak current mode is implemented with high-side FET current sense. Cord Compensation Sense resistors are connected to the channel 1 and channel 2 outputs, respectively. The sensed differential voltage is compared with interval reference to regulate current. CC loop and CV loop are in parallel. The current loop response is allowed to have slower response compared to voltage loop. However, during current transient response, the inductor current overshoot/undershoot should be controlled within +/-25% to avoid inductor saturation. In some applications, the increased with output current potential voltage drop across compensation is based on the resistance. For ACT4524, the compensation voltage can be derived as: ΔVout = RCS* IO*K Where RCS is the VOUT1 current resistance, IO is the output current, and K is the cord compensation factor. This voltage difference could be added on the reference or turning the (VCSP-VCSN) voltage into a sink current at FB pin to pull Vout higher than programmed voltage. Input Over Voltage Protection The converter is disabled if the input voltage is above 42V (+/-2V). Device resumes operation automatically 40ms after OVP is cleared. The cord compensation loop should be very slow to avoid potential disturbance to the voltage loop. The voltage loop should be sufficiently stable on various cord compensation setting. Output Over Voltage Protection Device stops switching when output over-voltage is sensed, and resumes operation automatically when output voltage drops to OVP- hysteresis. Thermal Shutdown Output Under-Voltage Protection / Hiccup Mode If the TJ increases beyond 160°C, ACT4524 goes into HZ mode and the timer is preserved until T J drops by 30°C. There is a under voltage protection (UVP) threshold. If the UVP threshold is hit for 10us, an over current or short circuit is assumed, and the Innovative PowerTM output voltage is to compensate the output cable. The high side feedback -5- www.active-semi.com Copyright © 2015 Active-Semi, Inc. ACT4524 Rev 1.1, 22-Feb-16 FUNCTIONAL DESCRIPTION CLK Mode There are three clock modes that depend on the mode pin configuration. During power up, device checks MODE pin condition (floating, 82k resistor to ground or grounded) to decide which mode (native, master or slave) device should operate in. If only single ACT4524 is required, mode pin can be left float, and ACT4524 runs at native mode using internal oscillator clock. For high load current application (>3.5A), it's possible to use two ACT4524 to operate in parallel with one device as master to provide clock for the other (slave). Two devices operate on the same frequency, but in opposite phase to optimize supply loading and EMI performance. Innovative PowerTM -6- www.active-semi.com Copyright © 2015 Active-Semi, Inc. ACT4524 Rev 1.1, 22-Feb-16 APPLICATIONS INFORMATION Inductor Selection Input Capacitor The inductor maintains a continuous current to the output load. This inductor current has a ripple which is determined by the inductance value. The input capacitor needs to be carefully selected to maintain sufficiently low ripple at the supply input of the converter. A low ESR capacitor is highly recommended. Since large current flows in and out of this capacitor during switching, its ESR also affects efficiency. Higher inductance reduces the peak-to-peak ripple current. The trade off for high inductance value is the increase in inductor core size and series resistance, and the reduction in current handling capability. In general, select an inductance value L based on ripple current requirement: L= VOUT ×(VIN _VOUT ) VIN fSW ILOADMAX K RIPPLE The input capacitance needs to be higher than 10µF. The best choice is the ceramic type, however, low ESR tantalum or electrolytic types may also be used provided that the RMS ripple current rating is higher than 50% of the output current. The input capacitor should be placed close to the VIN and GND pins of the IC, with the shortest traces as possible. In the case of tantalum or electrolytic types, they can be placed a little bit away of IC if a paralleled ceramic capacitor is placed right next to the IC. (1) Where VIN is the input voltage, VOUT is the output voltage, fSW is the switching frequency, ILOADMAX is the maximum load current, and KRIPPLE is the ripple factor. Typically, choose KRIPPLE = 30% to correspond to the peak-topeak ripple current being 30% of the maximum load current. Output Capacitor The output capacitor also needs to have low ESR to keep low output voltage ripple. The output ripple voltage is: With a selected inductor value the peak-to-peak inductor current is estimated as: ILPK _ PK = VOUT ×(VIN _VOUT ) L ×VIN ×fSW VRIPPLE IOUTMAX K RIPPLE R ESR (2) The peak inductor current is estimated as: 1 ILPK = ILOADMAX + ILPK _ PK 2 The selected inductor should not saturate at ILPK. The maximum output current is calculated as: 1 I _ 2 LPK PK is the internal current limit. LLIM (4) External High Voltage Bias Diode ACT4524 (5) For ceramic type output capacitor, typically choose a capacitance of about 22µF. For tantalum or electrolytic capacitors, choose a capacitor with less than 50mΩ ESR. A 330µF or 470µF electrolytic capacitor is recommended. It is recommended that an external High Voltage Bias diode be added when the system has a 5V fixed input or the power supply generates a 5V output. This helps improve the efficiency of the regulator. The High Voltage Bias diode can be a low cost one such as IN4148 or BAT54. Rectifier Diode Use a low forward voltage drop (Vf<0.5V) Schottky diode as the rectifier to conduct current when the High-Side Power Switch is off. The Schottky diode must have current rating higher than the maximum output current and a reverse voltage rating higher than the maximum input voltage. 5V HSB 2 28 fSW LCOUT Where IOUTMAX is the maximum output current, KRIPPLE is the ripple factor, RESR is the ESR of the output capacitor, fSW is the switching frequency, L is the inductance, and COUT is the output capacitance. In the case of ceramic output capacitors, RESR is very small and only contributes a very small portion of the ripple. Therefore, a lower capacitance value can be used for ceramic type. In the case of tantalum or electrolytic capacitors, the ripple is dominated by RESR multiplied by the ripple current. In that case, the output capacitor should be chosen to have sufficiently low ESR. (3) IOUTMAX = ILIM _ VIN 22nF SW Innovative PowerTM -7- www.active-semi.com Copyright © 2015 Active-Semi, Inc. ACT4524 Rev 1.1, 22-Feb-16 APPLICATIONS INFORMATION 2) The high power loss components, e.g. the controller, Schottky diode, and the inductor should be placed carefully to make the thermal spread evenly on the board. Current Sense Resistor The traces leading to and from the sense resistor can be significant error sources. With small value sense resistors, trace resistance shared with the load can cause significant errors. It is recommended to connect the sense resistor pads directly to the CSP and CSN pins using “Kelvin” or “4-wire” connection techniques as shown below. 3) Place input decoupling ceramic capacitor CIN as close to VIN pin as possible. CIN should be connected to power GND with several vias or short and wide copper trace. 4) Shottky anode pad and IC exposed pad should be placed close to ground clips in CLA applications. PCB Load Trace Kevin Sense Traces 5) Use “Kelvin” or “4-wire” connection techniques from the sense resistor pads directly to the CSP and CSN1, CSN2 pins. The CSP ,CSN1, and CSN2 traces should be in parallel to avoid interference. Sense Resistor 6) Place multiple vias between top and bottom GND planes for best heat dissipation and noise immunity. PCB Layout Guidance When laying out the printed circuit board, the following checklist should be used to ensure proper operation of the IC. 7) Use short traces connecting HSB-CHSB-SW loop. 8) SW pad is noise node switching from VIN to GND. It should be isolated away from the rest of circuit for good EMI and low noise operation. 1) Arrange the power components to reduce the AC loop size consisting of CIN, VIN pin, SW pin and the Schottky diode. Example PCB Layout Top Layer Bottom Layer Innovative PowerTM -8- www.active-semi.com Copyright © 2015 Active-Semi, Inc. ACT4524 Rev 1.1, 22-Feb-16 Figure 1: Typical Application Circuit for 5V/3.4A Car Charger Vout1 CSN2 CSN1 HSB SW IN 6.0V to 36V 5.10V/2.4A Rcs2 50m R1 0Ω D+ C1 47µ F C2 0.1µ F Vout2 CLK MODE R2 5.1Ω C3 10µ F GND R4 49.9k R3 49.9k CSP GND D- Rcs1 25m L1 33µ H ACT4524 VDD R6 43.2k R5 43.2k C4 22nF C6 10µ F C5 2.2nF 5.10V/1.0A C8 2.2µ F D1 S54 C7 220uF VDD C9 2.2µ F D- R7 200Ω D+ GND BOM List for 5V/3.4A Car Charger ITEM REFERENCE DESCRIPTION MANUFACTURER QTY 1 U1 IC, ACT4524YH-T, SOP-8EP Active-Semi 1 2 C1 Capacitor, Electrolytic, 47uF/35V, 6.3х7mm Murata, TDK 1 3 C2 Capacitor, Ceramic, 0.1µF/35V, 0805, SMD Murata, TDK 1 4 C3 Capacitor, Ceramic, 10µF/35V, 1206, SMD Murata, TDK 1 5 C4 Capacitor, Ceramic, 22nF/25V, 0603, SMD Murata, TDK 1 6 C5 Capacitor, Ceramic, 2.2nF/10V, 0603, SMD, optional Murata, TDK 1 7 C6 Capacitor, Ceramic, 10uF/10V, 1206, SMD Murata, TDK 1 8 C7 Capacitor, Electrolytic, 220uF/10V, 6.3х7mm Murata, TDK 1 9 C8, C9 Capacitor, Ceramic, 2.2µF/10V, 0805, SMD Murata, TDK 2 10 L1 Inductor, 33µH, 6.0A, 20%, DCR=15mΩ Murata, TDK 1 11 D1 Diode, Schottky, 40V/5A, S54 Vishay 1 12 R1 Chip Resistor, 0Ω, 1/10W, 5%, 0603 Murata, TDK 1 13 R2 Chip Resistor, 5.1Ω, 1/8W, 5%, 0805, optional Murata, TDK 1 14 Rcs1 Chip Resistor, 25mΩ, 1/4W, 1%, 1206 Murata, TDK 1 15 Rcs2 Chip Resistor, 50mΩ, 1/4W, 1%, 1206 Murata, TDK 1 16 R3, R4 Chip Resistor, 49.9kΩ, 1/10W, 5%, 0603 Murata, TDK 2 17 R5, R6 Chip Resistor, 43.2kΩ, 1/10W, 5%, 0603 Murata, TDK 2 18 R7 Chip Resistor, 200Ω, 1/10W, 5%, 0603 Murata, TDK 1 19 USB Innovative PowerTM USB Rev A 2 -9- www.active-semi.com Copyright © 2015 Active-Semi, Inc. ACT4524 Rev 1.1, 22-Feb-16 Figure 2: Typical Application Circuit for 5V/4.8A (2*ACT4524) Car Charger R1 0Ω CSN2 CSN1 HSB SW IN 6.0V to 36V C4 22nF R6 43.2k GND DD+ MODE D1 S54 R2 5.1Ω C3 10µF 5.10V/2.4A VDD CSP CLK C2 0.1µF R5 43.2k L1 40µH ACT4524 C1 47µF Rcs1 25m R7 82k GND C6 10µF C5 2.2nF C7 220uF C8 2.2µF R3 49.9k R4 49.9k R12 43.2k R13 43.2k USB1 R8 0Ω CSN2 CSN1 HSB SW IN C11 22nF L2 40µH ACT4524 CLK GND Innovative PowerTM C10 10µF 5.10V/2.4A VDD CSP DD+ MODE D2 S54 R9 5.1Ω C9 0.1µF Rcs2 25m GND C13 10µF C12 2.2nF - 10 - C14 220uF C15 2.2µF R10 49.9k R11 49.9k USB2 www.active-semi.com Copyright © 2015 Active-Semi, Inc. ACT4524 Rev 1.1, 22-Feb-16 BOM List for 5V/4.8A Car Charger ITEM REFERENCE 1 U1,U2 2 DESCRIPTION MANUFACTURER QTY IC, ACT4524YH-T, SOP-8EP Active-Semi 2 L1,L2 Inductor, 40µH, 6.0A, 20%, DCR=15mΩ Murata, TDK 2 3 D1,D2 Diode, Schottky, 40V/5A, S54 Vishay 2 4 C1 Capacitor, Electrolytic, 47uF/35V, 6.3х7mm Murata, TDK 1 5 C2,C9 Capacitor, Ceramic, 0.1µF/35V, 0805, SMD Murata, TDK 2 6 C3,C10 Capacitor, Ceramic, 10µF/35V, 1206, SMD Murata, TDK 2 7 C4,C11 Capacitor, Ceramic, 22nF/25V, 0603, SMD Murata, TDK 2 8 C5,C12 Capacitor, Ceramic, 2.2nF/10V, 0603, SMD, optional Murata, TDK 2 9 C6,C13 Capacitor, Ceramic, 10uF/10V, 1206, SMD Murata, TDK 2 10 C7,C14 Capacitor, Electrolytic, 220uF/10V, 6.3х7mm Murata, TDK 2 11 C8,C15 Capacitor, Ceramic, 2.2µF/10V, 0805, SMD Murata, TDK 2 12 R1,R8 Chip Resistor, 0Ω, 1/10W, 5%, 0603 Murata, TDK 2 13 R2,R9 Chip Resistor, 5.1Ω, 1/8W, 5%, 0805, optional Murata, TDK 3 14 Rcs1,Rcs2 Chip Resistor, 25mΩ, 1/4W, 1%, 1206 Murata, TDK 2 15 R3, R4,R10,R11 Chip Resistor, 49.9kΩ, 1/10W, 5%, 0603 Murata, TDK 4 16 R5, R6,R12,R13 Chip Resistor, 43.2kΩ, 1/10W, 5%, 0603 Murata, TDK 4 Murata, TDK 1 17 R7 18 USB Innovative PowerTM Chip Resistor, 82kΩ, 1/10W, 5%, 0603 USB Rev A 2 - 11 - www.active-semi.com Copyright © 2015 Active-Semi, Inc. ACT4524 Rev 1.1, 22-Feb-16 TYPICAL PERFORMANCE CHARACTERISTICS (Schematic as show in Figure 1, Ta = 25°C, unless otherwise specified) Power Loss vs. Load current Efficiency vs. Load current 85 VIN =16V 2.5 Power Loss (W) Efficiency (%) 90 VIN =24V 80 ACT4524-002 VIN =12V 95 3.0 ACT4524-001 100 75 70 2.0 VIN =24V 1.5 VIN =16V 1.0 VIN =12V 0.5 65 60 60 500 0 1000 1500 2000 2500 3000 0 3500 500 1000 3000 3500 Standby Current vs. Input Voltage Switching Frequency vs. Input Voltage 135 Standby Current (mA) 140 130 125 120 ACT4524-004 1.0 ACT4524-003 145 Switching Frequency (kHz) 2500 2000 Load Current (mA) Load Current (mA) 0.8 0.6 0.4 0.2 115 110 0 10 15 20 25 30 35 40 8 12 16 Input Voltage (V) 20 24 28 32 36 40 Input Voltage (V) Output1 CC vs. Input Voltage Output2 CC vs. Input Voltage Output2 Current (mA) 2640 2630 2620 2610 2600 ACT4524-006 1230 ACT4524-005 2650 Output1 Current (mA) 1500 1220 1210 1200 1190 1180 8 12 16 20 24 28 32 36 40 8 Input Voltage (V) Innovative PowerTM 12 16 20 24 28 32 36 40 Input Voltage (V) - 12 - www.active-semi.com Copyright © 2015 Active-Semi, Inc. ACT4524 Rev 1.1, 22-Feb-16 TYPICAL PERFORMANCE CHARACTERISTICS (Schematic as show in Figure 1, Ta = 25°C, unless otherwise specified) Output2 Current vs. Temperature Output1 Current vs. Temperature Output2 Current (mA) Output1 Current (mA) 2670 2640 2610 2580 2550 -20 10 40 70 100 130 VOUT = 5.1V VIN = 12V IOUT = 1.2A 1290 1260 1230 1200 1170 1140 -20 160 ACT4524-008 VOUT = 5.1V VIN = 12V IOUT= 2.65A 2700 1320 ACT4524-007 2730 10 40 70 100 Temperature (°C) Temperature (°C) Input Surge Test Start up into CC Mode 160 ACT4524-010 ACT4524-009 CH1 130 VOUT = 5.1V RLORD = 1.5Ω IOUT1 = 2.65A VIN = 12V CH2 CH1 CH3 CH2 CH1: VIN, 20V/div CH2: VOUT, 2V/div CH3: IOUT, 2A/div TIME: 100ms/div CH1: VOUT, 2V/div CH2: IOUT, 1A/div TIME: 400µs/div Start up into CC Mode Start up with CC load VIN = 12V V IN = 12V Vout=5.1V IIOUT == 3.6A 3.4A OUT ACT4524-012 ACT4524-011 VOUT = 5.1V RLORD = 2.5Ω IOUT2 = 1.2A VIN = 12V CH1 CH1 CH2 CH3 CH2 CH4 CH1: VOUT, 2V/div CH2: IOUT, 1A/div TIME: 400µs/div Innovative PowerTM CH1: VIN, 5V/div CH2: VOUT, 2V/div CH3: IL, 5A/div CH4: SW, 10V/div TIME: 1ms//div - 13 - www.active-semi.com Copyright © 2015 Active-Semi, Inc. ACT4524 Rev 1.1, 22-Feb-16 TYPICAL PERFORMANCE CHARACTERISTICS (Schematic as show in Figure 1, Ta = 25°C, unless otherwise specified) Output Short Test Power Off from CC load CH3 CH2 CH4 CH3 CH1: VIN, 5V/div CH2: VOUT, 2V/div CH3: IL, 5A/div CH4: SW, 10V/div TIME: 1ms//div CH1: VOUT, 2V/div CH2: IL, 5A/div CH3: SW, 10V/div TIME: 2s//div SW vs. Output Voltage Ripples Output Short Recovery ACT4524-016 ACT4524-015 VIN = 12V VOUT = 5.1V IOUT = 3.6A VIN = 12V VOUT = 5.1V IOUT = 3.6A CH1 ACT4524-014 CH2 ACT4524-013 VIN = 12V Vout=5.1V IOUT = 3.4A CH1 VIN = 12V IOUT1 = 0A Iout2 = 1.0A CH1 CH1 CH2 CH2 CH3 CH3 CH1: SW, 10V/div CH2: VOUT1 Ripple, 50mV/div CH3: VOUT2 Ripple, 50mV/div TIME: 4µs/div CH1: VOUT, 2V/div CH2: IL, 5A/div CH3: SW, 10V/div TIME: 2s//div SW vs. Output Voltage Ripples ACT4524-018 ACT4524-017 VIN = 12V IOUT1 = 2.4A Iout2= 0A SW vs. Output Voltage Ripples VIN = 12V IOUT1 = 2.4A Iout2= 1.0A CH1 CH1 CH2 CH2 CH3 CH3 CH1: SW, 10V/div CH2: VOUT1 Ripple, 50mV/div CH3: VOUT2 Ripple, 50mV/div TIME: 4µs/div Innovative PowerTM CH1: SW, 10V/div CH2: VOUT1 Ripple, 50mV/div CH3: VOUT2 Ripple, 50mV/div TIME: 4µs/div - 14 - www.active-semi.com Copyright © 2015 Active-Semi, Inc. ACT4524 Rev 1.1, 22-Feb-16 TYPICAL PERFORMANCE CHARACTERISTICS (Schematic as show in Figure 1, Ta = 25°C, unless otherwise specified) Load Transient (0mA-500mA-0mA) Load Transient (500mA-1A-500mA) CH1 CH2 CH2 CH3 CH3 CH1: VOUT1, 50mV/div CH2: VOUT2, 50mV/div CH3: IOUT1, 500mA/div TIME: 1ms//div CH1: VOUT1, 50mV/div CH2: VOUT2, 50mV/div CH3: IOUT1, 500mA/div TIME: 1ms//div Load Transient (1A-1.5A-1A) Load Transient (1.5A-2.4A-1.5A) ACT4524-022 ACT4524-021 CH1 ACT4524-020 ACT4524-019 CH1 CH1 CH2 CH2 CH3 CH3 CH1: VOUT1, 100mV/div CH2: VOUT2, 100mV/div CH3: IOUT1, 1A/div TIME: 1ms//div Innovative PowerTM CH1: VOUT1, 100mV/div CH2: VOUT2, 100mV/div CH3: IOUT1, 2A/div TIME: 1ms//div - 15 - www.active-semi.com Copyright © 2015 Active-Semi, Inc. ACT4524 Rev 1.1, 22-Feb-16 PACKAGE OUTLINE SOP-8EP PACKAGE OUTLINE AND DIMENSIONS E b e D D1 SYMBOL E2 A1 E1 A2 A L θ c DIMENSION IN MILLIMETERS DIMENSION IN INCHES MIN MAX MIN MAX A 1.350 1.727 0.053 0.068 A1 0.000 0.152 0.000 0.006 A2 1.350 1.550 0.053 0.061 b 0.330 0.510 0.013 0.020 c 0.170 0.250 0.007 0.010 D 4.700 5.100 0.185 0.200 D1 3.202 3.402 0.126 0.134 E 3.734 4.000 0.147 0.157 E1 5.800 6.200 0.228 0.244 E2 2.313 2.513 0.091 0.099 e 1.270 TYP 0.050 TYP L 0.400 1.270 0.016 0.050 θ 0° 8° 0° 8° Active-Semi, Inc. reserves the right to modify the circuitry or specifications without notice. Users should evaluate each product to make sure that it is suitable for their applications. Active-Semi products are not intended or authorized for use as critical components in life-support devices or systems. Active-Semi, Inc. does not assume any liability arising out of the use of any product or circuit described in this datasheet, nor does it convey any patent license. Active-Semi and its logo are trademarks of Active-Semi, Inc. For more information on this and other products, contact [email protected] or visit http://www.active-semi.com. is a registered trademark of Active-Semi. Innovative PowerTM - 16 - www.active-semi.com Copyright © 2015 Active-Semi, Inc.