AOZ9004B Single-Cell Battery Protection IC with Integrated MOSFET General Description Features The AOZ9004B is a battery protection IC with integrated dual common-drain N-channel MOSFET. The device includes accurate voltage detectors and delay circuits, and is suitable for protecting single-cell lithium-ion / lithium-polymer rechargeable battery packs from overcharge, over-discharge, and overcurrent conditions. ● ● The AOZ9004B is available in an 8-pin TSSOP package and is rated over a -40°C to +85°C ambient temperature range. ● ● ● ● ● Integrated common-drain N-channel MOSFET High-accuracy voltage detection circuit ◗ Overcharge detection accuracy ±25mV (+25°C), ±30mV (-5°C to +55°C) ◗ Overcharge release accuracy ±50mV ◗ Over-discharge detection accuracy ±50mV ◗ Over-discharge release accuracy ±100mV ◗ Discharge over-current detection accuracy ±15mV ◗ Load short-circuit detection accuracy ±300mV (AOZ9004BI), ±200mV (AOZ9004BI-01, 02, 03, and 04) ±20% accurate internal detection delay times (external capacitors are unnecessary) Charger connection pin withstands up to 28V Wide operating temperature range -40°C to +85°C Low current consumption ◗ 3.0µA (Typ.), 5.5µA (Max.) in operation mode at +25°C Small 8-pin TSSOP package Applications ● ● Lithium-ion rechargeable battery packs Lithium-polymer rechargeable battery packs Typical Application EB+ R1 220Ω Single-Cell Lithium-Ion/ Lithium Polymer Battery 8 7 6 5 IC VDD VM IC C1 0.1μF R2 2kΩ AOZ9004B VSS IC IC OUTM 1 2 3 4 EBFigure 1. Typical Application Rev. 1.2 August 2008 www.aosmd.com Page 1 of 17 AOZ9004B Ordering Information Overcharge Detection Voltage (VCU) Overcharge Release Voltage (VCL) Overdischarge Detection Voltage (VDL) Overdischarge Release Voltage (VDU) Discharge Overcurrent Threshold (VDIOV)* Charge Overcurrent Threshold (VCIOV)* 0V Battery Charge Function Shutdown Function AOZ9004BI 4.250V 4.05V 2.6V 2.9V 0.12V N/A No No AOZ9004BI-01 4.275V 4.175V 2.3V 2.4V 0.10V -0.10V Yes Yes AOZ9004BI-02 4.325V 4.075V 2.5V 2.9V 0.15V -0.10V No Yes AOZ9004BI-03 4.280V 4.130V 2.8V 3.1V 0.15V -0.10V No Yes AOZ9004BI-04 4.275V 4.075V 2.3V 2.3V 0.12V -0.10V Yes Yes Part Number * Please refer to Page 10 for calculation of charge and discharge current limit. • All AOS products are offered in packages with Pb-free plating and compliant to RoHS standards. • Parts marked as Green Products (with “L” suffix) use reduced levels of Halogens, and are also RoHS compliant. Please visit www.aosmd.com/web/quality/rohs_compliant.jsp for additional information. Table 1. Delay Time Combination(1) Delay Time Combination Overcharge Detection Delay Time (tCU) Over-discharge Detection Delay Time (tDL) Discharge Over-current Detection Delay Time (tDIOV) Charge Over-current Detection Delay Time (tCIOV) Load Short-circuiting Detection Delay Time (tSHORT) 1(2) 1.2s 150ms 9ms 9ms 560µs 2(3) 1.2s 150ms 9ms 9ms 300µs 3 143ms 38ms 18ms 9ms 300µs 4 1.2s 150ms 18ms 9ms 300µs (4) 1.2s 38ms 9ms 9ms 300µs 5 Notes: 1. The delay times can have the range specified in Table 2. Please contact our Sales department if you wish to order non-standard values and for additional information. 2. Combination 1 is the default delay time combination for AOZ9004BI-02. 3. Combination 2 is the default delay time combination for AOZ9004BI, AOZ9004BI-01, and AOZ9004BI-03. 4. Combination 5 is the default delay time combination for AOZ9004BI-04. Table 2. Delay Time Selection Range(5) Symbol Delay Time Selection Range tCU Overcharge detection delay time 143ms 573ms 1.2s tDL Over-discharge detection delay time 38ms 150ms 300ms tDIOV Discharge over-current detection delay time 4.5ms 9ms 18ms tCIOV Charge over-current detection delay time 4.5ms 9ms 18ms tSHORT Load short-circuiting detection delay time – 300µs 560µs Note: 5. The values in Bold are standard values. Please contact our Sales department if you wish to order non-standard values and for additional information. Rev. 1.2 August 2008 www.aosmd.com Page 2 of 17 AOZ9004B Pin Configuration VSS 1 8 IC IC 2 7 VCC IC 3 6 VM OUTM 4 5 IC TSSOP-8 (Top View) Pin Description Pin Number Pin Name Pin Function 1 VSS Ground. VSS is the source of the internal Discharge MOSFET N2 (Figure 1). Connect VSS directly to the cathode of lithium-ion/lithium polymer battery cell. 2 IC Internally Connected Pin. This pin is for test purposes only. Always leave this pin unconnected. 3 IC Internally Connected Pin. This pin is for test purposes only. Always leave this pin unconnected. 4 OUTM Output Pin. OUTM is the source of the internal Charge MOSFET N1 (Figure 1). Connect OUTM directly to the negative terminal of the battery pack. 5 IC Internally Connected Pin. This pin is for test purposes only. Always leave this pin unconnected. 6 VM Over-current / Charger Detection Pin. Connect a 2kΩ resistor between VM and the negative terminal of the battery pack. 7 VDD Input Supply Pin. Connect a 0.1µF capacitor between VDD and VSS. 8 IC Rev. 1.2 August 2008 Internally Connected Pin. This pin is for test purposes only. Always leave this pin unconnected. www.aosmd.com Page 3 of 17 AOZ9004B Block Diagram EB+ R1 220Ω VDD Oscillator OverDischarge Comp Counter/ Logic 0V Battery Charge Function VDD Single-Cell Lithium-Ion/ Lithium Polymer Battery C1 0.1μF Over-Charge Comp VSS Charger Detection Discharge Over-Current Comp RVDM Charge Over-Current Comp VM RVMS Short-Circuit Comp R2 2kΩ Battery Protection IC N2 N1 OUTM EB- Dual Common-Drain MOSFET AOZ9004B Figure 2. AOZ9004B Function Block Diagram Absolute Maximum Ratings Exceeding the Absolute Maximum ratings may damage the device. Parameter Rating VDD to VSS -0.3V to +12V VM to VDD -28V to +0.3V MOSFET Gate-to-Source Voltage -0.3V to +12V Continuous Drain Current(4) (RθJA = 95°C/W, TA = 25°C) (RθJA = 95°C/W, TA = 85°C) 5A 3A Pulsed Drain Current 30A Storage Temperature (TS) -55°C to +125°C Operating Temperature (TA) -40°C to +85°C (6) Power Dissipation (RθJA = 95°C/W, TA = 25°C) (RθJA = 95°C/W, TA = 85°C) 1.1W 0.5W Note: 6. The value of RθJA is measured with the device mounted on 1-in2 FR-4 board with 2-oz. copper, in a still air environment with TA = 25°C. The value in any given application depends on the user’s specific board design. Rev. 1.2 August 2008 www.aosmd.com Page 4 of 17 AOZ9004B Electrical Characteristics TA = 25°C unless otherwise specified. Parameters specified over TA = -40°C to +85°C are guaranteed by design only and not production tested. Symbol Parameter Condition Min. Typ. Max. Unit VCU–0.025 VCU VCU+0.025 V DETECTION VOLTAGE VCU VCL Overcharge Detection Voltage Overcharge Release Voltage TA = 25°C TA = -5°C to +55°C VCU–0.03 VCU VCU+0.03 TA = -40°C to +85°C VCU–0.060 VCU VCU+0.040 VCL ≠ VCU VCL = VCU VDL Over-Discharge Detection Voltage (2.0 to 3.0V, Adjustable) VDU Over-Discharge Release Voltage (2.0 to 3.40V, Adjustable) TA = 25°C VCL–0.05 VCL VCL+0.05 TA = -40°C to +85°C VCL–0.08 VCL VCL+0.065 TA = 25°C VCL–0.025 VCL VCL+0.025 TA = -40°C to +85°C VCL–0.06 VCL VCL+0.04 VDL–0.05 VDL VDL+0.05 TA = 25°C TA = -40°C to +85°C VDL–0.11 VDL VDL+0.13 VDU ≠ VDL TA = 25°C VDU–0.10 VDU VDU+0.10 TA = -40°C to +85°C VDU–0.15 VDU VDU+0.19 VDU = VDL TA = 25°C VDU–0.05 VDU VDU+0.05 TA = -40°C to +85°C VDIOV VSHORT VCIOV Discharge Over-Current Threshold Load Short-Circuiting Detection Voltage Charge Over-Current Threshold VDU–0.11 VDU VDU+0.13 TA = 25°C VDIOV–0.015 VDIOV VDIOV+0.015 TA = -40°C to +85°C VDIOV–0.021 VDIOV VDIOV+0.024 AOZ9004BI, TA = 25°C 0.9 1.2 1.5 AOZ9004BI, TA = -40°C to +85°C 0.7 1.2 1.7 V V V V V AOZ9004BI-01/02/03/04, TA = 25°C 0.3 0.5 0.7 AOZ9004BI-01/02/03/04 TA = -40°C to +85°C 0.16 0.5 0.84 AOZ9004BI-01/02/03/04, TA = 25°C -0.13 -0.1 -0.07 AOZ9004BI-01/02/03/04 TA = -40°C to +85°C -0.14 -0.1 -0.06 V 0V BATTERY CHARGE FUNCTION V0INH V0CHA 0V Battery Charge Inhibition Battery Voltage (0V battery charging function “unavailable”) 0V Battery Charge Starter Battery Voltage (0V battery charging function “available”) TA = 25°C 0.5 TA = -40°C to +85°C 0.3 TA = 25°C 1.2 TA = -40°C to +85°C 1.7 V V INPUT VOLTAGE VDSOP1 Operating Voltage Between VDD Pin and VSS Pin Internal Circuit Operating Voltage 1.5 8 V VDSOP2 Operating Voltage Between VDD Pin and VM Pin Internal Circuit Operating Voltage 1.5 28 V VDD = 3.5V, VVM = 0V 1.0 5.5 µA INPUT CURRENT (No Shutdown Function) IOPE Current Consumption During Operation IOPED Current Consumption During Over-Discharge Rev. 1.2 August 2008 3.0 TA = -40°C to +85°C 0.7 3.0 6.0 VDD = VVM = 1.5V 0.3 2.0 3.5 TA = -40°C to +85°C 0.2 2.0 3.8 www.aosmd.com µA Page 5 of 17 AOZ9004B Electrical Characteristics (Continued) TA = 25°C unless otherwise specified. Parameters specified over TA = -40°C to +85°C are guaranteed by design only and not production tested. Symbol Parameter Condition Min. Typ. Max. Unit VDD = 3.5V, VVM = 0V 1.0 3.0 5.5 µA TA = -40°C to +85°C 0.7 3.0 6.0 INPUT CURRENT (Shutdown Function) IOPE IPDN Current Consumption During Operation Current Consumption at Shutdown VDD = VVM = 1.5V 0.2 TA = -40°C to +85°C 0.3 µA INTEGRATED MOSFET BVDS_C Charge Control MOSFET Drain-Source Breakdown Voltage VDD = VCU ILEAK_C Charge Control MOSFET Leakage Current VDD = VCU BVDS_D Discharge Control MOSFET Drain-Source Breakdown Voltage VDD = VDL ILEAK_D Discharge Control MOSFET Leakage Current VDD = VDL Total Output Resistance (OUTM to VSS) VDD = 3.5V, IOUT = 1.5A RSS 30 V 1 30 µA V 1 µA 40 48 mΩ s DETECTION DELAY TIME (Combination 2 per Table 1) tCU tDL tDIOV tCIOV tSHORT Overcharge Detection Delay Time Over-Discharge Detection Delay Time Discharge Over-Current Detection Delay Time Charge Over-Current Detection Delay Time Load Short-Circuiting Detection Delay Time TA = 25°C 0.96 1.2 1.4 TA = -40°C to +85°C 0.7 1.2 2 TA = 25°C 120 150 180 TA = -40°C to +85°C 83 150 255 TA = 25°C 7.2 9 11 5 9 15 TA = -40°C to +85°C TA = 25°C 7.2 9 11 5 9 15 TA = 25°C 240 300 360 TA = -40°C to +85°C 150 300 540 TA = -40°C to +85°C ms ms ms µs DETECTION DEALY TIME (Combination 5 per Table 1) tCU tDL Overcharge Detection Delay Time Over-Discharge Detection Delay Time tDIOV Discharge Over-Current Detection Delay Time tCIOV Charge Over-Current Detection Delay Time tSHORT Load Short-Circuiting Detection Delay Time Rev. 1.2 August 2008 TA = 25°C 0.96 1.2 1.4 TA = -40°C to +85°C 0.7 1.2 2 TA = 25°C 30 38 46 TA = -40°C to +85°C 20 38 65 TA = 25°C 7.2 9 11 5 9 15 7.2 9 11 TA = -40°C to +85°C TA = 25°C TA = -40°C to +85°C 5 9 15 TA = 25°C 240 300 360 TA = -40°C to +85°C 150 300 540 www.aosmd.com s ms ms ms µs Page 6 of 17 AOZ9004B Electrical Characteristics (Continued) TA = 25°C unless otherwise specified. Parameters specified over TA = -40°C to +85°C are guaranteed by design only and not production tested. Symbol Parameter Condition Min. Typ. Max. Unit 0.96 1.2 1.4 s DETECTION DEALY TIME (Combination 1 per Table 1) tCU Overcharge Detection Delay Time tDL Over-Discharge Detection Delay Time tDIOV tCIOV tSHORT Discharge Over-Current Detection Delay Time Charge Over-Current Detection Delay Time Load Short-Circuiting Detection Delay Time Rev. 1.2 August 2008 TA = 25°C TA = -40°C to +85°C 0.7 1.2 2 TA = 25°C 120 150 180 TA = -40°C to +85°C 83 150 255 TA = 25°C 7.2 9 11 5 9 15 7.2 9 11 5 9 15 TA = 25°C 450 560 670 TA = -40°C to +85°C 260 560 940 TA = -40°C to +85°C TA = 25°C TA = -40°C to +85°C www.aosmd.com ms ms ms µs Page 7 of 17 AOZ9004B Typical Performance Characteristics On-Regions Characteristics 30 Transfer Characteristics 20 2.5V 3V 10V 25 4V 15 I D (A) I D (A) 20 15 10 VDD =2V 10 5 5 0 0 01 2 3 45 00 .5 11 VDS (Volts) .5 On-Resistance vs. Junction Temperature 70 1.8 Normalized On-Resistance 60 VDD =2.5V 50 RSS(ON) (mΩ ) 22 V DD (Volts) On-Resistance vs. Drain Current and Gate Voltage 40 VDD =4.5V 30 20 10 0 0 5 10 15 ID =6A 1.4 VDD =2.5V ID =3A 1.2 1 0.8 20 VDD =4.5V 1.6 0 25 I D (A) 50 75 100 125 150 175 Temperature (°C) Body-Diode Characteristics On-Resistance vs. Gate-Source Voltage 1.0E+01 120 125°C ID =3A 100 1.0E+00 80 1.0E-01 IS (A) RSS(ON) (mΩ) .5 60 125°C 25°C 1.0E-02 1.0E-03 40 25°C 1.0E-04 20 0 0 Rev. 1.2 August 2008 2 4 6 VDD (Volts) 8 10 1.0E-05 0.0 www.aosmd.com 0.2 0.4 0.6 0.8 VSD (Volts) 1.0 1.2 Page 8 of 17 AOZ9004B Theory of Operation Please refer to the Timing Diagrams for more information. Normal Status The AOZ9004B monitors the voltage between the VDD pin and VSS pin and the voltage difference between the VM pin and VSS pin to control charging and discharging. Since the device only draws a few microamperes of current during operation and the voltage drop across the low-pass filter R1 is negligible, the voltage between VDD and VSS is equal to the battery voltage. When the battery voltage is in the range between over-discharge detection voltage (VDL) and overcharge detection voltage (VCU), and the VM pin voltage is in the range between the charge over-current detection voltage (VCIOV) and discharge over-current detection voltage (VDIOV), the IC turns both the charging and discharging control FETs on. In this normal status, charging and discharging can be carried out freely. Caution: Products with “Shut-down Function Available” feature may not enable discharging when the battery is connected for the first time. Connect the charger or short VM pin to VSS can restore the normal status. Overcharge Status When the battery voltage rises higher than overcharge detection voltage (VCU) for the overcharge detection delay time (tCU) or longer in the normal status, the AOZ9004B turns off the charging control MOSFET to stop charging. This condition is the overcharge status. The resistance (RVMD) between the VM pin and VDD pin, and the resistance (RVMS) between the VM pin and VSS pin are not connected. The overcharge status is released in the following two cases: 1. When the battery voltage falls below overcharge release voltage (VCL) and VM pin voltage is higher than -0.7V (Typ.) (charger is removed), the AOZ9004B turns on the charging control MOSFET and returns to the normal status. 2. When a load is connected and battery voltage is below overcharge detection voltage (VCU), the AOZ9004B turns on the charging control MOSFET and returns to the normal status. Caution: When both charger and load are connected after overcharge detection, charging control FET still remains off and a portion of the load current may flow through body diode of charging control FET if the charger can not supply the full load current. This condition may overheat the charging control FET. Please refer to the Typical Characteristics for more information. Rev. 1.2 August 2008 Over-Discharge Status When the battery voltage falls below over-discharge detection voltage (VDL) for the over-discharge detectiondelay time (tDL) or longer, the IC turns off the discharging control MOSFET to stop discharging. This condition is the over-discharge status. Under the over-discharge status, the VM pin voltage is pulled up by the resistor between the VM pin and VDD pin in the IC (RVMD). When voltage difference between the VM pin and VDD pin is 1.3V (Typ.) or lower, the productions with “Shut-down Function Available” feature can enter the shut-down status to save power. At this status, the current consumption is reduced to the shut-down current consumption (IPON). The shut-down status is released when a charger is connected and the voltage difference between the VM pin and VDD pin becomes 1.3V (Typ.) or higher. When a battery in the over-discharge status is connected to a charger and provides that the VM pin voltage is lower than -0.7V (Typ.), the AOZ9004B releases the overdischarge status and turns on the discharging MOSFET when the battery voltage reaches over-discharge detection voltage (VDL) or higher. If VM pin voltage is not lower than -0.7V (Typ.), the AOZ9004B releases the overdischarge status and turns on the discharging MOSFET when the battery voltage reaches over-discharge detection voltage (VDU) or higher. Discharge Over-Current Status (Discharge Over-current, Load Short-circuiting) When a battery is in the normal status, and the discharge current becomes higher than specified value and the status lasts for the discharge over-current detection delay time (tDIOV), the IC turns off the discharge control MOSFET and stops discharging. This status is the discharge over-current status. In the discharge overcurrent status, the VM pin and VSS pin are shorted by the resistor between VM pin and VSS pin (RVMS) in the IC. When the load is disconnected, the VM pin returns to the VSS potential. When the impedance between the EB+ pin and EB- pin (Refer to Figure 1) increases and is equal to the impedance that enables automatic restoration and the voltage at the VM pin returns to discharge overcurrent detection voltage (VDIOV) or lower, the discharge over-current status is restored to the normal status. Even if the connected impedance is smaller than automatic restoration level, the AOZ9004B will be restored to the normal status from discharge over-current detection status when the voltage at the VM pin becomes the discharge over-current detection voltage (VDIOV) or lower by connecting the charger. The resistance (RVMD) between the VM pin and VDD pin is not connected in the discharge over-current detection status. www.aosmd.com Page 9 of 17 AOZ9004B When a battery is in the normal status, and the discharge current becomes abnormally higher (EB+ pin and EB- pin shorted), and thus the VM pin voltage is equal or higher than load short-circuiting detection voltage (VSHORT) for load short-circuiting detection delay time (tSHORT), the IC turns off the discharge control MOSFET and stops discharging. This status is the load shorting-circuiting status. In the load shorting-circuiting status, the VM pin and VSS pin are shorted by the resistor between VM pin and VSS pin (RVMS) in the IC. When the short-circuiting condition is released, the VM pin returns to the VSS potential. The resistance (RVMD) between the VM pin and VDD pin is not connected in the load shortingcircuiting status. Charge Over-Current Status When a battery in the normal status, and the charge current is higher than the specified value and the status lasts for the charge over-current detection delay time (tCIOV), the charge control MOSFET is turned off and charging is stopped. This status is the charge over-current status. This IC will be restored to the normal status from the charge over-current status when, the voltage at the VM pin returns to charge over-current detection voltage (VCIOV) or higher by removing the charger. The charge over-current detection function does not work in the overdischarge status. The resistance (RVMD) between the VM pin and VDD pin, and the resistance (RVMS) between the VM pin and VSS pin are not connected in the charge over-current status. Battery Charging Function “Unavailable” This function inhibits recharging when a battery that is internally short-circuited (0V battery) is connected. When the battery voltage is the 0V battery charge inhibition battery voltage (V0INH) or lower, the charging control MOSFET gate is fixed to the EB- pin voltage to inhibit charging. When the battery voltage is the 0V battery charge inhibition battery voltage (V0INH) or higher, charging can be performed. Calculation of Current Limit The charge and discharge current limit is determined by the charge and discharge over-current threshold voltages (VDIOV and VCIOV), and the total resistance of the internal MOSFET (RSS). Use the following equations to determine the maximum and minimum current limits: I DIOV _ MAX = V DIOV _ MAX I CIOV _ MAX = VCIOV _ MAX RSS _ MIN RSS _ MIN ; I DIOV _ MIN = V DIOV _ MIN ; I CIOV _ MIN = VCIOV _ MIN RSS _ MAX R SS _ MAX 0V Battery Charging Function “Available” This function is used to recharge a connected battery whose voltage is 0V due to self-discharge. When the 0V battery charge starting charger voltage (V0CHA) or a higher voltage is applied between the EB+ and EB- pins by connecting a charger, the charging control MOSFET gate is fixed to the VDD pin voltage. When the voltage between the gate and source of the charging control MOSFET becomes equal to or higher than the turn-on voltage due to the charger voltage, the charging control MOSFET is turned on to start charging. At this time, the discharging control MOSFET is off and the charging current flows through the internal parasitic diode in the discharging control MOSFET. When the battery voltage becomes equal to or higher than overdischarge release voltage (VDU), the AOZ9004B enters the normal status. Rev. 1.2 August 2008 www.aosmd.com Page 10 of 17 AOZ9004B Timing Diagrams VCU Battery Voltage VCL VDU VDL Charge tCU tDL Battery Current Discharge VDD VM Pin VDIOV Voltage V SS VEB- Connect Load Connect Charger Mode (1) (2) (1) Connect Charger (3) (1) Mode: 1. Normal Mode 2. Overcharge Mode 3. Over-Discharge Mode Figure 3. Overcharge and Over-discharge Detection Timing Diagram Rev. 1.2 August 2008 www.aosmd.com Page 11 of 17 AOZ9004B Battery Voltage VCU VCL VDU VDL Charge Battery Current Discharge tDIOV tSHORT VDD VM Pin Vshort Voltage VDIOV VSS Normal Load Mode Overcurrent Load (1) (4) Short Circuit (1) (4) Normal Load (1) Mode: 1. Normal Mode 4. Discharge Over-current Mode Figure 4. Discharging Over-current Detection Timing Diagram Rev. 1.2 August 2008 www.aosmd.com Page 12 of 17 AOZ9004B Battery Voltage VCU VCL VDU VDL Charge Battery Current tCIOV tCIOV Discharge VDD VM Pin Voltage VSS VCIOV VEBConnected Charger with Charge Overcurrent Mode (3) (1) (5) Connected Charger with Charge Overcurrent (1) (5) Mode: 1. Normal Mode 3. Over-Discharge Mode 5. Charge over-current mode Figure 5. Charging Over-current Detection Timing Diagram Rev. 1.2 August 2008 www.aosmd.com Page 13 of 17 AOZ9004B Applications Information EB+ R1 220Ω Single-Cell Lithium-Ion/ Lithium Polymer Battery 8 7 6 5 IC VDD VM IC C1 0.1μF R2 2kΩ AOZ9004B VSS IC IC OUTM 1 2 3 4 EBFigure 6. AOZ9004B Applications Circuit A low-pass filter formed by R1 and C1 reduces supply voltage fluctuation on the VDD pin. R1 also provides ESD protection and serves as an current-limiting resistor in the event of charger reverse connection. The supply current of AOZ9004B has to flow through R1, so a small R1 should be chosen to guarantee detection accuracy of VDD voltage. Choose a resistor value between 100Ω and 330Ω for R1. Choose the value of C1 to be 0.022µF or higher. Both R1 and C1 should be placed as close as possible to AOZ9004B to minimize parasitic effect. R2 provides ESD protection and serve as a currentlimiting resistor in the event of charger reverse connection. A large value resistor should be chosen to limit power consumption during this condition. However, an extremely large value of R2, of course, will cause inaccuracy of VM pin voltage detection. Choose a resistor value between 300Ω and 4kΩ for R2. Table 3. External Components Selection Range Designator Purpose Min. Typ. Max. R1 Reduce supply voltage fluctuation, provide ESD protection, and limit current when a charger is reversely connected 0.022µF 0.1µF 1.0µF C1 Reduce supply voltage fluctuation 100Ω 220Ω 330Ω R2 Provide ESD protection and limit current when a charger is reversely connected 300Ω 2kΩ 4kΩ Rev. 1.2 August 2008 www.aosmd.com Page 14 of 17 AOZ9004B Package Dimensions, TSSOP-8L Gauge Plane Seating Plane D 0.25 e C L E E1 θ A2 12°(4X) 0.1 A A1 Recommended Land Pattern 1.00 6.00 0.65 0.40 UNIT: mm b Dimensions in millimeters Dimensions in inches Symbols A Min. — Nom. — Max. 1.20 Symbols A Min. — Nom. — Max. 0.047 A1 A2 b 0.05 0.80 0.19 — 1.00 — 0.15 1.05 0.30 A1 A2 b 0.002 0.031 0.007 — 0.039 — 0.006 0.041 0.012 C D E E1 e L θ 0.09 2.90 0.20 3.10 C D E E1 e L θ 0.004 0.114 — 3.00 6.40 BSC 4.30 4.40 0.65 BSC 0.45 0.60 0° — 4.50 0.75 8° — 0.008 0.118 0.122 0.252 BSC 0.169 0.173 0.177 0.026 BSC 0.018 0.024 0.030 0° — 8° Notes: 1. All dimensions are in millimeters. 2. Dimensions are inclusive of plating 3. Package body sizes exclude mold flash and gate burrs. Mold flash at the non-lead sides should be less than 6 mils. 4. Dimension L is measured in gauge plane. 5. Controlling dimension is millimeter, converted inch dimensions are not necessarily exact. 6. Refer to JEDEC MO-153(AA). Rev. 1.2 August 2008 www.aosmd.com Page 15 of 17 AOZ9004B Tape and Reel Dimensions, TSSOP-8L TSSOP-8 Carrier Tape P1 D1 See Note 3 P2 T See Note 5 E1 E2 E B0 See Note 5 K0 D0 A0 P0 Feeding Direction Unit: mm Package TSSOP-8 (12mm) A0 6.80 ±0.10 B0 3.40 ±0.10 K0 1.60 ±0.10 D0 1.50 ±0.10 D1 1.50 Min. E 12.00 ±0.30 TSSOP-8 Reel E1 1.75 ±0.10 E2 5.50 ±0.05 P0 8.00 ±0.10 P1 4.00 ±0.10 P2 2.00 ±0.10 T 0.30 ±0.05 W1 S G N M K V R H W Tape Size Reel Size M N W 12mm ø330 ø178.00 ø60.00 13.00 ±0.50 ±0.10 +1.50/-0.00 W1 16.00 ±1.00 H K ø13.50 10.60 ±0.50 S 2.00 ±0.50 G — R — V — TSSOP-8 Tape Leader/Trailer & Orientation Trailer Tape 300mm min. or 75 empty pockets Rev. 1.2 August 2008 Components Tape Orientation in Pocket www.aosmd.com Leader Tape 500mm min. or 125 empty pockets Page 16 of 17 AOZ9004B AOZ9004B Package Marking Z9004B Part Number Code FAYWLT Fab & Assembly Location Assembly Lot Code Year & Week Code Rev. 1.2 August 2008 www.aosmd.com Page 17 of 17