DA6011.000 15 September 2008 MAS6011 This is advance information on a new product under development. Micro Analog Systems Oy reserves the right to make any changes without notice. Solar Cell System Manager • Power Down Indicator • Low Battery Indicator • Battery Overcharging Protection DESCRIPTION MAS6011 solar cell system manager monitors the supply voltage of a battery-powered system containing solar cells. Current consumption of this IC is extremely low. The solar manager uses three output signals to indicate the state of the system. Power Down (XPD) indicates whether the supply FEATURES • • • • voltage is high enough to run the system. Low Battery (LB) is used to signal the situation where the battery is low. The third signal, SOL, is used for battery charging control. When the battery is full it bypasses the charging current by an internal switch to avoid overcharging of the battery. APPLICATIONS Power Down Indicator Low Battery Indicator Battery Overcharging Protection Suitable for VL-type Rechargeable Lithium Batteries • • Solar Powered Watch Solar Powered Equipment BLOCK DIAGRAM VDD XPD LB MAS6011 SOL GND 1 (8) DA6011.000 15 September 2008 PAD LAYOUT: MAS6011AA3 1040 µm MAS6011 XPD 1540 µm GND SOL VDD LB DIE size = 1040 mm x 1540 mm PAD size = 80 x 80 µm Note: This is a CMOS device and therefore it should be handled carefully to avoid any damage by static voltages (ESD). Make sure that GND is the first pad to be bonded. Pick-and-place and all component assembly are recommended to be performed in ESD protected area. Note: If the die is to be placed on metal plane, the metal plane should be connected to GND or left floating because the substrate of the die is internally connected to GND. Note: Coordinates are pad center points where origin has been located in the center of the silicon die. Pad Identification Name X-coordinate Y-coordinate Power Supply Ground Power Down Output Solar Charging Output Power Supply Voltage Low Battery Output GND XPD SOL VDD LB -129 µm 253 µm -167 µm 102 µm 253 µm 563 µm 563 µm -563 µm -563 µm -563 µm 2 (8) DA6011.000 15 September 2008 FUNCTIONAL DESCRIPTION The solar manager generates three signals: XPD (Power Down), LB (Low Battery) and SOL (Solar Charging). These signals are produced by three comparators which have hysteresis build in. Each comparator compares supply voltage (VDD) to internal switching levels (see Electrical Characteristics on the next page). The current consumption of the comparators is extremely low. The electrical parameters are described more detailed in the Electrical Characteristics chapter. XPD signal can be used to stop the whole system whenever the power supply level has dropped low enough. When the power supply voltage is too low the XPD goes low to signal the microcontroller to go to power down. When the power supply voltage is high enough the XPD goes high signaling power up situation. In case of low power microcontroller (max current consumption about 150 µA) the XPD pin can be used to feed supply voltage directly to the microcontroller by connecting XPD pin to the supply voltage pin of the microcontroller (see application figure 3). LB signal indicates that the battery is low but not empty. LB goes high when power supply level is too low and LB goes low when power supply level is high enough. SOL is used for controlling the charging of the rechargeable battery. When power supply voltage goes high enough, the internal PMOS switch between VDD and SOL pins is switched on to shunt the solar cell charging current and to prevent battery overcharging. When the power supply voltage is not too high the internal PMOS switch is nonconductive. In operation without an external Schottky diode between the pins SOL and GND, the voltage at pin SOL is clamped to about 700 mV below GND by an internal diode-connected PNP transistor. MAS6011 does not have any control pin. After the power supply is connected the device is ready to be used. Figure 1 illustrates MAS6011 functions and shows the comparator switching levels at both battery charging (rising VDD) and discharging (falling VDD) conditions. The XPD, LB and SOL switching levels have been designed for usage of VL-type rechargeable lithium batteries. VDD 3.3V SOL_OFF (charging off) 3.2V SOL_ON (charging on) 3.1V 3.0V 2.9V Battery Voltage 2.8V 2.7V BATTERY CHARGING (VDD RISING) BATTERY DISCHARGING (VDD FALLING) LB_OFF (low battery off) XPD_OFF (power down off) 2.6V 2.5V 2.4V LB_ON (low battery on) XPD_ON (power down on) 2.3V 2.2V 2.1V 2.0V Figure 1. MAS6011 functions 3 (8) DA6011.000 15 September 2008 ABSOLUTE MAXIMUM RATINGS All voltages with respect to ground. Parameter Supply Voltage Voltage range for all pins Operating temperature Storage Temperature Symbol Conditions VDD TA TS Min Max Unit -0.3 -0.3 -20 -50 6.0 VDD+0.3 +60 +125 V V o C o C Stresses beyond those listed may cause permanent damage to the device. The device may not operate under these conditions, but it will not be destroyed. This is a CMOS device and therefore it should be handled carefully to avoid any damage by static voltages (ESD). ELECTRICAL CHARACTERISTICS: MAS6011AA3 (3V BATTERY, MCU VDDmin ≤ 2.1V) TA = -20°C to +60°C, typical values at TA = +27°C, unless otherwise specified. Parameter Supply voltage Symbol Conditions VDD Current consumption IQ XPD switching level XPD_OFF XPD_ON VXPD(H) Power Down Off (XPD high) Power Down On (XPD low) XPD output voltage VXPD(OUT) LB switching level LB hysteresis LB_OFF LB_ON VLB(H) VDD = 2.1 V, IXPD = -150 µA Low Battery Off (LB low) Low Battery On (LB high) LB output voltage VLB(OUT) XPD hysteresis SOL switching level SOL hysteresis SOL sink current SOL_OFF SOL_ON VSOL(H) ISOL SOL leakage current LB_OFF – XPD_OFF VLB_XPD_OFF LB_ON – XPD_ON VLB_XPD ON SOL_OFF – LB_OFF VSOL_LB_OFF SOL_ON – LB_ON VSOL_LB ON Min Typ Max Unit 2.0 3.0 3.6 V 130 VDD = 2.1 V, ILB = -50 µA VDD = 3.0 V, ILB = +50 µA Solar Charging Off Solar Charging On VDD = 3.2 V, SOL = 0 V, SOL switch On VDD = 2.9 V 2.50 2.10 200 2.70 2.30 400 nA 2.90 2.50 mV 2.0 2.60 2.35 100 2.75 2.50 250 3.05 2.85 50 2.05 0.05 3.25 3.15 100 V 2.90 2.65 V 3.55 3.45 mA 50 350 200 V mV 50 100 V mV 22 -50 V nA mV 300 mV 500 mV 650 mV TBD = To be defined 4 (8) DA6011.000 15 September 2008 TYPICAL APPLICATION VDD XPD Solar cells 4.7 µF LB VDD Watch MCU Display / Stepper Motors GND SOL MAS6011 V BATT 3V + V BATT 3V + – GND Schottky diode: Vishay SD103A or similar. Figure 2. Typical application circuit of MAS6011AA3 – XPD as power on control signal for a microcontroller VDD XPD Solar cells 4.7 µF VDD LB Watch MCU Display / Stepper Motors GND SOL MAS6011 GND Schottky diode: Vishay SD103A or similar. Figure 3. Typical application circuit of MAS6011AA3 – XPD as supply voltage for a low power microcontroller 5 (8) – DA6011.000 15 September 2008 MAS6011AA3 SAMPLES IN SBDIL 20 PACKAGE VDD 1 20 SOL 19 NC 18 NC GND 2 NC 3 NC 6 NC 7 NC 8 17 NC 6011AA3 YYWW XXXXX.X NC 4 NC 5 16 NC 15 NC 14 NC Top Marking Definitions: YYWW = Year Week XXXXX.X = Lot Number x = Sample Version Number 13 NC NC 9 12 LB 11 XPD NC 10 SBDIL 20 PIN DESCRIPTION Pin Name Pin Type VDD GND NC XPD LB NC SOL 1 2 3, 4, 5, 6, 7, 8, 9, 10 11 12 13, 14, 15, 16, 17, 18, 19 20 P G Function Positive Power Supply Power Supply Ground DO DO Power Down Output Low Battery Output AO Solar Charging Output NC = Not Connected, P = Power, G = Ground, DO = Digital Output, AO = Analog Output MAS6011AA3 IN QFN 3x3 PACKAGE QFN 3x3 6ld GND 6 XPD 5 4 1234 GAA3 YWW 1 2 3 SOL VDD LB Top Marking Information: 1234 = Product Number, AA3 = Version Number G = Lead Free, RoHS Compliant Package, YWW = Year Week QFN 3x3 PIN DESCRIPTION Pin Name Pin Type SOL VDD LB XPD 1 2 3 4 5 6 AO P DO DO NC G GND Function Solar Charging Output Positive Power Supply Low Battery Output Power Down Output Power Supply Ground NC = Not Connected, P = Power, G = Ground, DO = Digital Output, AO = Analog Output 6 (8) DA6011.000 15 September 2008 PACKAGE (QFN 3X3x0.75 6ld) OUTLINE D D/2 E/2 TOP VIEW A3 A PIN 1 MARK AREA SIDE VIEW A1 SEATING PLANE D2 D2/2 L E2 E2/2 SHAPE OF PIN #1 IDENTIFICATION IS OPTIONAL BOTTOM VIEW EXPOSED PAD e Symbol Min b Nom Max PACKAGE DIMENSIONS A 0.70 0.75 0.80 A1 0.0 0.02 0.05 A3 0.178 0.203 0.228 b 0.350 0.400 0.450 D 3.00 BSC D2 (Exposed pad) 2.25 2.3 2.35 E 3.00 BSC E2 (Exposed pad) 1.45 1.5 1.55 e 0.95 BSC L 0.425 0.475 0.525 Dimensions do not include mold or interlead flash, protrusions or gate burrs. Unit mm mm mm mm mm mm mm mm mm mm 7 (8) DA6011.000 15 September 2008 ORDERING INFORMATION Product Code Product Package Solar Cell System Manager (for 3 V Tested wafer, thickness 400 rechargeable battery) µm MAS6011AA3Q1306 Solar Cell System Manager (for 3 V QFN 3x3x0.75mm rechargeable battery) Pb-free RoHS compliant Please contact Micro Analog Systems Oy for 1.5 V rechargeable battery voltage version. Comments MAS6011AA3WA300 Tape and Reel LOCAL DISTRIBUTOR MICRO ANALOG SYSTEMS OY CONTACTS Micro Analog Systems Oy Kamreerintie 2, P.O.Box 51 FIN-02771 Espoo, FINLAND http://www.mas-oy.com Tel. (09) 80 521 Tel. Int. +358 9 80 521 Telefax +358 9 805 3213 E-mail: [email protected] 8 (8)