DATASHEET ISL9307 FN7931 Rev 3.00 September 20, 2012 3MHz Dual 1500mA Step-Down Converters and Dual Low-Input LDOs Features The ISL9307 is an integrated mini Power Management IC (mini-PMIC) ideal for applications for powering low-voltage microprocessor or multiple voltage rails with a battery as an input source, such as a single Li-ion or Li-polymer. ISL9307 integrates two high-efficiency, 3MHz, synchronous step-down converters (DCD1 and DCD2) and two low-input, low-dropout linear regulators (LDO1 and LDO2). • Dual 1500mA, Synchronous Step-down Converters and Dual 300mA, General-purpose LDOs • Input Voltage Range - DCD1/DCD2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2.5V to 5.5V - VINLDO . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.5V to 5.5V The 3MHz PWM switching frequency allows the use of very small external inductors and capacitors. Both step-down converters can enter skip mode under light load conditions to further improve efficiency and maximize battery life. • Adjustable Output Voltage - VODCD1/VODCD2 . . . . . . . . . . . . . . . . . . . . . . . . 0.8V to VIN • 50μA IQ (Typ) with DCD1/DCD2 in Skip Mode; 20μA IQ (Typ) for each Enabled LDO The ISL9307 features EN pins for each channel, thus allowing startup delay for power sequencing. • EN Pins for DCD1/DCD2 and LDO1/LDO2 • Small, Thin, 4mmx4mm TQFN The ISL9307 also provides two 300mA low-dropout (LDO) regulators. The input voltage range is 1.5V to 5.5V, which allows them to be powered from one of the on-chip step-down converters or directly from a battery. The default LDO power-up output comes with factory pre-set fixed output voltage options between 0.9V and 3.3V. Applications • Cellular Phones, Smart Phones • PDAs, Portable Media Players, Portable Instruments • Single Li-ion/Li-polymer Battery-Powered Equipment The ISL9307 is available in a 4mmx4mm 16 Ld TQFN. • DSP Core Power L 1 = 1.5µH 2.5V TO 5.5V C1 10µF 1500m A SW 1 VINDCD1 VINDCD2 R1 FB1 ENDCD1 ENDCD2 C4 10µF R2 L 2 = 1.5µH 1500m A SW 2 ISL9307 ENLDO1 FB2 R3 C5 10µF R4 ENLDO2 1.5V TO 5.5V C2 1µF VOLDO1 VINLDO 300m A VOLDO2 GNDDCD1 GNDDCD2 GNDLDO 300m A C6 1µF C7 1µF NOTE: ONLY FOR ADJUSTABLE OUTPUT VERSION . FOR FIXED OUTPUT VERSION, DIRECTLY CONNECT THE FB PIN TO THE OUTPUT OF THE BUCK CONVERTER . FIGURE 1. TYPICAL APPLICATION DIAGRAM FN7931 Rev 3.00 September 20, 2012 Page 1 of 13 ISL9307 TABLE 1. TYPICAL APPLICATION PART LIST PARTS DESCRIPTION MANUFACTURER PART NUMBER SPECIFICATIONS SIZE L1, L2 Inductor Sumida CDRH2D14NP-1R5 1.5µH/1.80A/50mΩ 3.0mmx3.0mmx1.55mm C1 Input capacitor Murata GRM21BR60J106KE19L 10µF/6.3V 0805 C2, C3 Input capacitor Murata GRM185R60J105KE26D 1µF/6.3V 0603 C4, C5 Output capacitor Murata GRM21BR60J106KE19L 4.7µF/6.3V 0805 C6, C7 Output capacitor Murata GRM185R60J105KE26D 10µF/6.3V 0603 R1, R2, R3, R4 Resistor Various 1%, SMD, 0.1Ω 0603 Block Diagram SHORT CIRCUIT PROTECTION ENDCD1 ANALOG/LOGIC CIRCUIT INPUT BUCK CONVERTER OVERCURRENT PROTECTION FN7931 Rev 3.00 September 20, 2012 4.7µF FB1 GNDDCD1 10µF 1.5µH SW2 BUCK CONVERTER FB2 4.7µF GNDDCD2 VINLDO THERMAL SHUTDOWN ENLDO2 SW1 VINDCD2 DCD2 ENLDO1 10µF 1.5µH DCD1 ENDCD2 VINDCD1 1µF LDO1 300mA VOLDO1 LDO2 300mA VOLDO2 1µF GNDLDO 1µF Page 2 of 13 ISL9307 Pin Configuration 13 SW2 14 GNDDCD2 15 GNDCDC1 16 SW1 ISL9307 (16 LD 4X4 TQFN) TOP VIEW VINDCD1 1 12 VINDCD2 FB1 2 11 FB2 E-PAD ENLDO2 8 9 GNDLDO VOLDO2 7 ENLDO1 4 VOLDO1 6 10 ENDCD2 VINLDO 5 ENDCD1 3 Pin Descriptions PIN NUMBER (TQFN) NAME 1 VINDCD1 2 FB1 3 ENDCD1 Enable pin for DCD1. Tie high or low. Do not float. 4 ENLDO1 Enable pin for LDO1. Tie high or low. Do not float. 5 VINLDO Input voltage for LDO1 and LDO2 6 VOLDO1 Output voltage of LDO1 7 VOLDO2 Output voltage of LDO2 8 ENLDO2 Enable pin for LDO2. Tie high or low. Do not float. 9 GNDLDO Power ground for LDO1 and LDO2 10 ENDCD2 Enable pin for DCD2. Tie high or low. Do not float. 11 FB2 12 VINDCD2 13 SW2 14 GNDDCD2 Power ground for DCD2 15 GNDDCD1 Power ground for DCD1 16 SW1 Switching node for DCD1; connect to one terminal of the inductor. E-pad E-pad Exposed pad; connect to system ground. FN7931 Rev 3.00 September 20, 2012 DESCRIPTION Input voltage for buck converter DCD1 and power supply pin for all internal digital/ analog circuits. Feedback pin for DCD1; connect external voltage divider resistors between DCDC1 output, this pin, and ground. For fixed output versions, connect this pin directly to the DCD1 output. Feedback pin for DCD2; connect external voltage divider resistors between DCD2 output, this pin, and ground. For fixed output versions, connect this pin directly to the DCD2 output. Input voltage for buck converter DCD2 Switching node for DCD2; connect to one terminal of the inductor. Page 3 of 13 ISL9307 Ordering Information PART NUMBER (Notes 1, 2, 3) PART MARKING FBSEL DCD1 (V) FBSEL DCD2 (V) SLV LDO1 (V) SLV LDO2 (V) TEMP. RANGE (°C) PACKAGE (Pb-free) PKG. DWG. # ISL9307IRTAAJBZ-T 9307I AAJBZ Adj Adj 2.8 1.5 -40 to +85 16 Ld TQFN L16.4X4G ISL9307IRTAAJBZ-T7A 9307I AAJBZ Adj Adj 2.8 1.5 -40 to +85 16 Ld TQFN L16.4X4G ISL9307IRTAAJFZ-T 9307I AAJFZ Adj Adj 2.8 2.5 -40 to +85 16 Ld TQFN L16.4X4G ISL9307IRTAAJFZ-T7A 9307I AAJFZ Adj Adj 2.8 2.5 -40 to +85 16 Ld TQFN L16.4X4G ISL9307IRTAAJGZ-T 9307I AAJGZ Adj Adj 2.8 2.7 -40 to +85 16 Ld TQFN L16.4X4G ISL9307IRTAAJGZ-T7A 9307I AAJGZ Adj Adj 2.8 2.7 -40 to +85 16 Ld TQFN L16.4X4G ISL9307IRTAAJLZ-T 9307I AAJLZ Adj Adj 2.8 2.9 -40 to +85 16 Ld TQFN L16.4X4G ISL9307IRTAAJLZ-T7A 9307I AAJLZ Adj Adj 2.8 2.9 -40 to +85 16 Ld TQFN L16.4X4G ISL9307IRTAAJYZ-T 9307I AAJYZ Adj Adj 2.8 0.9 -40 to +85 16 Ld TQFN L16.4X4G ISL9307IRTAAJYZ-T7A 9307I AAJYZ Adj Adj 2.8 0.9 -40 to +85 16 Ld TQFN L16.4X4G ISL9307IRTAANCZ-T 9307I AANCZ Adj Adj 3.3 1.8 -40 to +85 16 Ld TQFN L16.4X4G ISL9307IRTAANCZ-T7A 9307I AANCZ Adj Adj 3.3 1.8 -40 to +85 16 Ld TQFN L16.4X4G ISL9307IRTAANFZ-T 9307I AANFZ Adj Adj 3.3 2.5 -40 to +85 16 Ld TQFN L16.4X4G ISL9307IRTAANFZ-T7A 9307I AANFZ Adj Adj 3.3 2.5 -40 to +85 16 Ld TQFN L16.4X4G ISL9307IRTAANGZ-T 9307I AANGZ Adj Adj 3.3 2.7 -40 to +85 16 Ld TQFN L16.4X4G ISL9307IRTAANGZ-T7A 9307I AANGZ Adj Adj 3.3 2.7 -40 to +85 16 Ld TQFN L16.4X4G ISL9307IRTAANLZ-T 9307I AANLZ Adj Adj 3.3 2.9 -40 to +85 16 Ld TQFN L16.4X4G ISL9307IRTAANLZ-T7A 9307I AANLZ Adj Adj 3.3 2.9 -40 to +85 16 Ld TQFN L16.4X4G ISL9307IRTAANWZ-T 9307I AANWZ Adj Adj 3.3 1.2 -40 to +85 16 Ld TQFN L16.4X4G ISL9307IRTAANWZ-T7A 9307I AANWZ Adj Adj 3.3 1.2 -40 to +85 16 Ld TQFN L16.4X4G ISL9307IRTAANYZ-T 9307I AANYZ Adj Adj 3.3 0.9 -40 to +85 16 Ld TQFN L16.4X4G ISL9307IRTAANYZ-T7A 9307I AANYZ Adj Adj 3.3 0.9 -40 to +85 16 Ld TQFN L16.4X4G ISL9307IRTWCNJZ-T 9307I WCNJZ 1.2 1.8 3.3 2.8 -40 to +85 16 Ld TQFN L16.4X4G ISL9307IRTWCNJZ-T7A 9307I WCNJZ 1.2 1.8 3.3 2.8 -40 to +85 16 Ld TQFN L16.4X4G ISL9307IRTWCWNZ-T 9307I WCWNZ 1.2 1.8 1.2 3.3 -40 to +85 16 Ld TQFN L16.4X4G ISL9307IRTWCWNZ-T7A 9307I WCWNZ 1.2 1.8 1.2 3.3 -40 to +85 16 Ld TQFN L16.4X4G ISL9307IRTAAJBEV1Z Evaluation Board ISL9307IRTAAJFEV1Z Evaluation Board ISL9307IRTAAJGEV1Z Evaluation Board ISL9307IRTAAJLEV1Z Evaluation Board ISL9307IRTAAJYEV1Z Evaluation Board ISL9307IRTAANCEV1Z Evaluation Board ISL9307IRTAANFEV1Z Evaluation Board ISL9307IRTAANGEV1Z Evaluation Board ISL9307IRTAANLEV1Z Evaluation Board ISL9307IRTAANWEV1Z Evaluation Board ISL9307IRTAANYEV1Z Evaluation Board ISL9307IRTWCNJEV1Z Evaluation Board ISL9307IRTWCWNEV1Z Evaluation Board NOTES: 1. Please refer to TB347 for details on reel specifications. 2. These Intersil Pb-free plastic packaged products employ special Pb-free material sets, molding compounds/die attach materials, and 100% matte tin plate plus anneal (e3 termination finish, which is RoHS compliant and compatible with both SnPb and Pb-free soldering operations). Intersil Pb-free products are MSL classified at Pb-free peak reflow temperatures that meet or exceed the Pb-free requirements of IPC/JEDEC J STD-020. 3. For Moisture Sensitivity Level (MSL), please see device information page for ISL9307. For more information on MSL please see Tech Brief TB363. FN7931 Rev 3.00 September 20, 2012 Page 4 of 13 ISL9307 Absolute Maximum Ratings (Refer to Ground) Thermal Information SW1, SW2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -1.5V to 6.5V FB1, FB2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.3V to 3.6V GNDDCD1, GNDDCD2, GNDLDO. . . . . . . . . . . . . . . . . . . . . . . . -0.3V to 0.3V All other pins . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.3V to 6.5V ESD Ratings Human Body Model (Tested per JESD22-A114F) . . . . . . . . . . . . . . .3.5kV Machine Model (Tested per JESD22-A115-A) . . . . . . . . . . . . . . . . . 225V Charged Device Model (Tested per JESD22-C101D) . . . . . . . . . . . .2.2kV Latch Up (Tested per JESD78B, Class II, Level A) . . . . . . . . . . . . . . . 100mA Thermal Resistance (Typical) JA (°C/W) 16 Ld TQFN Package (Note 4). . . . . . . . . . . . . . . . . . . . . 40.2 Maximum Junction Temperature Range . . . . . . . . . . . . . .-40°C to +150°C Recommended Junction Temperature Range . . . . . . . . .-40°C to +125°C Storage Temperature Range. . . . . . . . . . . . . . . . . . . . . . . .-65°C to +150°C Recommended Operating Conditions VINDCD1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2.5V to 5.5V VINDCD2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2.3V to VINDCD1 VINLDO. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.5V to VINDCD1 DCD1 and DCD2 Output Current . . . . . . . . . . . . . . . . . . . . 0mA to 1500mA LDO1 and LDO2 Output Current . . . . . . . . . . . . . . . . . . . . . . 0mA to 300mA Operating Ambient Temperature . . . . . . . . . . . . . . . . . . . . . -40°C to +85°C CAUTION: Do not operate at or near the maximum ratings listed for extended periods of time. Exposure to such conditions may adversely impact product reliability and result in failures not covered by warranty. NOTE: 4. JA is measured in free air with the component mounted on a high effective thermal conductivity test board with “direct attach” features. See Tech Brief TB379. Electrical Specifications Unless otherwise noted, typical specifications are measured at the following conditions: TA = +25°C, VINDCD1 = 3.6V, VINDCD2 = 3.3V. For LDO1 and LDO2, VINLDO = VOLDO + 0.5V to 5.5V with VINLDO always no higher than VINDCD1. L1 = L2 = 1.5µH, C1 = C4 = C5 = 10µF, C2 = C6 = C7 = 1µF, IOUT = 0A for DCD1, DCD2, LDO1 and LDO2 (see Figure 1 on page 1 for more details). Boldface limits apply over the operating temperature range, -40°C to +85°C. PARAMETER MIN (Note 5) TYP MAX (Note 5) UNIT 2.5 - 5.5 V Rising - 2.2 2.3 V Falling 1.9 2.1 - V SYMBOL TEST CONDITIONS VINDCD1, VINDCD2 Voltage Range VINDCD1, VINDCD2 Undervoltage Lockout Threshold VUVLO Quiescent Supply Current on VINDCD1 IVIN1 Only DCD1 enabled; no load and no switching on DCD1 - 40 60 µA IVIN2 Only DCD1 and LDO1 enabled; no load and no switching on DCD1 - 60 95 µA IVIN3 Both DCD1 and DCD2 enabled; no load and no switching on both DCD1 and DCD2 - 50 75 µA IVIN4 Only LDO1 and LDO2 enabled - 110 130 µA IVIN5 DCD1, DCD2, LDO1 and LDO2 enabled; no load and no switching on both DCD1 and DCD2 - 135 160 µA ISD VINDCD1 = 5.5V; DCD1, DCD2, LDO1 and LDO2 disabled - 0.15 5 µA Thermal Shutdown - 155 - °C Thermal Shutdown Hysteresis - 30 - °C 0.785 0.8 0.815 V FB = 0.75V - 0.001 - µA Output Voltage Accuracy VIN = VO + 0.5V to 5.5V (minimal 2.5V), 1mA load -3 - +3 % Line Regulation VIN = VO + 0.5V to 5.5V (minimal 2.5V) - 0.1 - %/V 1500 - - mA Shutdown Supply Current DCD1 AND DCD2 FB1, FB2 Regulation Voltage VFB FB1, FB2 Bias Current IFB Maximum Output Current FN7931 Rev 3.00 September 20, 2012 Page 5 of 13 ISL9307 Electrical Specifications Unless otherwise noted, typical specifications are measured at the following conditions: TA = +25°C, VINDCD1 = 3.6V, VINDCD2 = 3.3V. For LDO1 and LDO2, VINLDO = VOLDO + 0.5V to 5.5V with VINLDO always no higher than VINDCD1. L1 = L2 = 1.5µH, C1 = C4 = C5 = 10µF, C2 = C6 = C7 = 1µF, IOUT = 0A for DCD1, DCD2, LDO1 and LDO2 (see Figure 1 on page 1 for more details). Boldface limits apply over the operating temperature range, -40°C to +85°C. (Continued) MIN (Note 5) TYP MAX (Note 5) UNIT VIN = 3.6V, IO = 200mA - 0.14 0.20 Ω VIN = 2.3V, IO = 200mA - 0.24 0.40 Ω VIN = 3.6V, IO = 200mA - 0.11 0.20 Ω 0.18 0.34 Ω 2.1 2.5 2.75 A - 100 - % - 0.005 1 µA 2.6 3.0 3.4 MHz - 70 - ns - 115 - Ω No higher than VINDCD1 1.5 - 5.5 V VINDCD1 = 2.3V, Rising - 1.41 1.46 V VINDCD1 = 2.3V, Falling 1.33 1.37 - V 350 425 540 mA - 125 250 mV IO = 300mA, 2.1V < VO ≤ 2.8V - 100 200 mV IO = 300mA, VO > 2.8V - 80 170 mV Power Supply Rejection Ratio IO= 300mA @ 1kHz, VIN = 3.6V, VO = 2.6V, TA = +25°C - 55 - dB Output Voltage Noise VIN = 4.2V, IO = 10mA, TA = +25°C, BW = 10Hz to 100kHz - 45 - µVRMS PARAMETER SYMBOL P-Channel MOSFET ON-resistance N-Channel MOSFET ON-resistance TEST CONDITIONS VIN = 2.3V, IO = 200mA P-Channel MOSFET Peak Current Limit IPK SW Maximum Duty Cycle SW Leakage Current PWM Switching Frequency VIN = 5.5V fS VFB = 0.75V SW Minimum ON-time Bleeding Resistor LDO1 AND LDO2 VINLDO Supply Voltage VINLDO Undervoltage Lock-out Threshold VUVLO Internal Peak Current Limit Dropout Voltage IO = 300mA, VO ≤ 2.1V ENABLE PIN LOGIC ENDCD1, ENDCD2, ENLDO1, ENLDO2 Pin Logic High 1.4 V ENDCD1, ENDCD2, ENLDO1, ENLDO2 Pin Logic Low Enable Pin Leakage Current 0.05 0.4 V 1 µA NOTE: 5. Parameters with MIN and/or MAX limits are 100% tested at +25°C, unless otherwise specified. Temperature limits established by characterization and are not production tested. FN7931 Rev 3.00 September 20, 2012 Page 6 of 13 ISL9307 Theory of Operation DCD1 and DCD2 Both the DCD1 and DCD2 converters on ISL9307 use the peak-current-mode pulse-width modulation (PWM) control scheme for fast transient response and pulse-by-pulse current limiting. Both converters are able to supply up to 1500mA load current. Under light load conditions, the device enters a pulse-skipping mode to minimize switching loss by reducing switching frequency. Figure 2 illustrates the skip mode operation. A zero-cross sensing circuit monitors the current flowing through the SW node for zero crossing. When it is detected to cross zero for 16 consecutive cycles, the regulator enters skip mode. During the 16 consecutive cycles, the inductor current could be negative. The counter is reset to zero when the sensed current flowing through the SW node does not cross zero during any cycle within the 16 consecutive cycles. Once the converter enters skip mode, the pulse modulation is controlled by an internal comparator while each pulse cycle remains synchronized to the PWM clock. The P-channel MOSFET is turned on at the rising edge of the clock and turned off when its current reaches ~20% of the peak current limit. As the average inductor current in each cycle is higher than the average current of the load, the output voltage rises cycle-overcycle. When the output voltage is sensed to reach 1.5% above its nominal voltage, the P-channel MOSFET is turned off immediately, and the inductor current is fully discharged to zero and stays at zero. The output voltage reduces gradually due to the load current discharging the output capacitor. When the output voltage drops to the nominal voltage, the P-channel MOSFET turns on again, repeating the previous operations. The regulator resumes normal PWM mode operation when the output voltage is sensed to drop below 1.5% of its nominal voltage value, as shown in Figure 3. 16 CYCLES CLOCK 20% PEAK CURRENT LIMIT IL 0 1.015*VOUT_NOMINAL VOUT VOUT_NOMINAL FIGURE 2. SKIP MODE OPERATION WAVEFORMS vEAMP vCSA d iL vOUT FIGURE 3. PWM OPERATION WAVEFORMS FN7931 Rev 3.00 September 20, 2012 Page 7 of 13 ISL9307 Soft-Start Board Layout Recommendations Soft-start reduces the in-rush current during the start-up stage. The soft-start block limits the current rising speed so that the output voltage rises in a controlled fashion. The ISL9307 is a high frequency switching charger and hence the PCB layout is a very important design practice to ensure a satisfactory performance. Overcurrent Protection The power loop is composed of the output inductor, L; the output capacitor, COUT; the SW pin; and the PGND pin. It is important to make the power loop as small as possible, and the connecting traces among them should be direct, short and wide. The same practice should be applied to the connection of the VIN pin; the input capacitor, CIN; and PGND. The ISL9307 provides overcurrent protection for DCD1 and DCD2 for when an overload condition occurs. When the current at P-channel MOSFET is sensed to reach the current limit, the internal protection circuit is triggered to turn off the P-channel MOSFET immediately. DCD Short-Circuit Protection The ISL9307 provides short-circuit protection for both DCD1 and DCD2. The feedback voltage is monitored for output short-circuit protection. When the output voltage is sensed to be lower than a certain threshold, the internal circuit will change the PWM oscillator frequency to a lower frequenciy to protect the IC from damage. The P-channel MOSFET peak current limit remains active during this state. Undervoltage Lockout (UVLO) An undervoltage lockout (UVLO) circuit is provided on ISL9307. The UVLO circuit block can prevent abnormal operation in the event that the supply voltage is too low to guarantee proper operation. The UVLO on VINDCD1 is set for a typical 2.2V with 100mV hysteresis. VINLDO is set for a typical 1.4V with 50mV hysteresis. When the input voltage is sensed to be lower than the UVLO threshold, the related channel is disabled. The switching node of the converter, the SW pin, and the traces connected to this node are very noisy, so keep the voltage feedback trace and other noise-sensitive traces away from these noisy traces. The input capacitor should be placed as close as possible to the VIN pin. The ground of the input and output capacitors should be connected as close as possible as well. In addition, a solid ground plane is helpful for good EMI performance. The ISL9307 employs a thermally enhanced TQFN package with an exposed pad. The exposed pad should be properly soldered onto the thermal pad of the board to remove heat from the IC. The thermal pad should be big enough for nine vias, as shown in Figure 4. Low Dropout Operation Both DCD1 and DCD2 converters feature low dropout operation to maximize battery life. When the input voltage drops to a level at which the converter can no longer operate under switching regulation to maintain the output voltage, the P-channel MOSFET is completely turned on (100% duty cycle). The dropout voltage under such a condition is the product of the load current and the ON-resistance of the P-channel MOSFET. Minimum required input voltage (VIN) under such a condition is the sum of output voltage plus voltage drop across the inductor and the P-channel MOSFET switch. FIGURE 4. EXPOSED THERMAL PAD Active Output Voltage Discharge For DCD1, DCD2 The ISL9307 offers a feature to actively discharge the output voltage of DCD1 and DCD2 via an internal bleeding resistor (typical 115Ω) when the channel is disabled. Thermal Shutdown The ISL9307 provides a built-in thermal protection function with thermal shutdown threshold temperature set at +155°C with +25°C hysteresis (typical). When the die temperature is sensed to reach +155°C, the regulator is completely shut down, and as the temperature is sensed to drop to +130°C (typical), the device resumes normal operation, starting from soft-start. FN7931 Rev 3.00 September 20, 2012 Page 8 of 13 ISL9307 Typical Operating Conditions FIGURE 5. DCD OUTPUT RIPPLE (VIN = 4.2V, PFM, TIME SCALE = 1µs) CH1: VODCD1 (20mV/DIV), CH2: IL1 (500mA/DIV), CH3: VODCD2 (20mV/DIV), CH4: IL2 (500mA/DIV) FIGURE 6. DCD OUTPUT RIPPLE (VIN = 4.2V, FULL LOADING @ VODCD1 AND VODCD2, TIME SCALE = 200ns) CH1: SW1 (5V/DIV), CH2: VODCD1 (20mA/DIV), CH3: SW2 (5V/DIV), CH4: VODCD2 (20mA/DIV) FIGURE 7. INDUCTOR CURRENT RIPPLE (VIN = 3.6V, PFM, TIME SCALE = 200ns) CH1: SW1 (2V/DIV), CH2: IL1 (200mA/DIV), CH3: SW2 (2V/DIV), CH4: IL2 (200mA/DIV) FIGURE 8. INDUCTOR CURRENT RIPPLE (VIN = 3.6V, FULL LOADING, PWM, TIME SCALE = 200ns) CH1: SW1 (2V/DIV), CH2: IL1 (500mA/DIV), CH3: SW2 (2V/DIV), CH4: IL2 (500mA/DIV) FN7931 Rev 3.00 September 20, 2012 Page 9 of 13 ISL9307 Typical Operating Conditions (Continued) FIGURE 9. DCD1 TRANSIENT RESPONSE (VIN = 3.6V, STEP LOAD: 150mA TO 1500mA) CH1: VODCD1 (100mV/DIV, AC), CH2: VODCD2 (50mV/DIV, AC, CH4: IL4 (500mA/DIV) FIGURE 11. ENABLE WAVEFORM CH1: ENDCD1/ENDCD2/ENLDO1/ENLDO2 (5V/DIV), CH2: VODCD1: (2V/DIV), CH3: VODCD2 (2V/DIV), CH4: VOLDO1 (1V/DIV) FIGURE 10. DCD2 TRANSIENT RESPONSE (VIN = 3.6V, STEP LOAD: 150mA TO 1500mA) CH1: VODCD1 (100mV/DIV, AC), CH2: VODCD2 (50mV/DIV, AC, CH4: IL4 (500mA/DIV) FIGURE 12. 4-CHANNEL POWER-UP AFTER ENABLE CH1: VOLDO1 (1V/DIV), CH2: VODCD1 (2V/DIV), CH3: VODCD2 (2V/DIV), CH4: VOLDO2 (1V/DIV) 100 90 90 80 EFFICIENCY (%) EFFICIENCY (%) 80 70 VIN = 5.5V VIN = 3.6V 60 VIN = 2.8V 50 VIN = 5.5V VIN = 3.6V 60 VIN = 2.8V 50 40 40 30 70 1 10 100 1000 OUTPUT CURRENT (mA) 10000 FIGURE 13. EFFICIENCY vs LOAD (V OUT = 1.8V, PFM/PWM) FN7931 Rev 3.00 September 20, 2012 30 1 10 100 1000 OUTPUT CURRENT (mA) 10000 FIGURE 14. EFFICIENCY vs LOAD (V OUT = 1.2V, FORCED PWM) Page 10 of 13 ISL9307 1.83 1.23 1.82 1.22 1.81 OUTPUT VOLTAGE (V) OUTPUT VOLTAGE (V) Typical Operating Conditions (Continued) 1.80 VIN = 3.6V VIN = 5.5V 1.79 VIN = 2.8V 1.78 1.20 VIN = 5.5V VIN = 2.8V 1.19 1 10 100 1000 10000 1.17 1 10 OUTPUT CURRENT (mA) FIGURE 15. DCD OUTPUT VOLTAGE vs OUTPUT CURRENT (VOUT = 1.8V, PFM/PWM) 100 1000 OUTPUT CURRENT (mA) 10000 FIGURE 16. DCD OUTPUT VOLTAGE vs OUTPUT CURRENT (VOUT = 1.2V, PFM/PWM) 70 58 56 60 QUIESCENT CURRENT (µA) POWER SUPPLY REJECTION RATIO (dB) VIN = 3.6V 1.18 1.77 1.76 1.21 50 40 30 PSRR 20 V = 3.6V IN 10 VOUT = 2.6V LOAD = 300mA 0 0.1 1 10 100 1000 FREQUENCY (kHz) FIGURE 17. RIPPLE REJECTION RATIO vs FREQUENCY +85°C 54 52 50 +25°C 48 46 -40°C 44 VO = 1.2V 42 DCD1 = DCD2 = NO SWITCHING, NO LOAD LDO1 = LDO2 = DISABLED 40 2.5 3.0 3.5 4.0 4.5 5.0 5.5 6.0 INPUT VOLTAGE (V) FIGURE 18. QUIESCENT CURRENT vs INPUT VOLTAGE I FN7931 Rev 3.00 September 20, 2012 Page 11 of 13 ISL9307 Revision History The revision history provided is for informational purposes only and is believed to be accurate, but not warranted. Please go to web to make sure you have the latest revision. DATE REVISION CHANGE July 24, 2012 FN7931.3 Page 5 - Abs Max Ratings, ESD Ratings changed from: Machine Model (Tested per JESD22-A115-A). . . . . .2.2kV Charged Device Model (Tested per JESD22-C101D). . .225V to: Machine Model (Tested per JESD22-A115-A). . . . . .225V Charged Device Model (Tested per JESD22-C101D). . .2.2kV February 24, 2012 FN7931.2 Initial Release to web. Products Intersil Corporation is a leader in the design and manufacture of high-performance analog semiconductors. The Company's products address some of the industry's fastest growing markets, such as, flat panel displays, cell phones, handheld products, and notebooks. Intersil's product families address power management and analog signal processing functions. Go to www.intersil.com/products for a complete list of Intersil product families. For a complete listing of Applications, Related Documentation and Related Parts, please see the respective product information page. Also, please check the product information page to ensure that you have the most updated datasheet: ISL9307 To report errors or suggestions for this datasheet, please go to: www.intersil.com/askourstaff FITs are available from our website at: http://rel.intersil.com/reports/search.php © Copyright Intersil Americas LLC 2012. All Rights Reserved. All trademarks and registered trademarks are the property of their respective owners. For additional products, see www.intersil.com/en/products.html Intersil products are manufactured, assembled and tested utilizing ISO9001 quality systems as noted in the quality certifications found at www.intersil.com/en/support/qualandreliability.html Intersil products are sold by description only. Intersil may modify the circuit design and/or specifications of products at any time without notice, provided that such modification does not, in Intersil's sole judgment, affect the form, fit or function of the product. 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For information regarding Intersil Corporation and its products, see www.intersil.com FN7931 Rev 3.00 September 20, 2012 Page 12 of 13 ISL9307 Package Outline Drawing L16.4x4G 16 LEAD THIN QUAD FLAT NO-LEAD PLASTIC PACKAGE Rev 0, 4/10 4X 1.95 4.00 12X 0.65 A B 13 6 PIN 1 INDEX AREA 6 PIN #1 INDEX AREA 16 1 4.00 12 2 . 10 ± 0 . 10 9 (4X) 4 0.15 8 TOP VIEW 5 0.10 M C A B 16X 0 . 50 ± 0 . 1 4 0.30 ± 0.05 BOTTOM VIEW SEE DETAIL "X" 0.10 C 0.75 C BASE PLANE SEATING PLANE 0.08 C SIDE VIEW ( 3 . 6 TYP ) ( 2 . 10 ) ( 12X 0 . 65 ) C 0 . 2 REF 5 ( 16X 0 . 30 ) 0 . 00 MIN. 0 . 05 MAX. ( 16 X 0 . 70 ) TYPICAL RECOMMENDED LAND PATTERN DETAIL "X" NOTES: 1. Dimensions are in millimeters. Dimensions in ( ) for Reference Only. 2. Dimensioning and tolerancing conform to ASME Y14.5m-1994. 3. Unless otherwise specified, tolerance : Decimal ± 0.05 4. Dimension applies to the metallized terminal and is measured between 0.15mm and 0.30mm from the terminal tip. 5. Tiebar shown (if present) is a non-functional feature. 6. The configuration of the pin #1 identifier is optional, but must be located within the zone indicated. The pin #1 identifier may be 7. JEDEC reference drawing: MO220K. either a mold or mark feature. FN7931 Rev 3.00 September 20, 2012 Page 13 of 13