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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 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.
FEATURES
* * * * Power Down Indicator Low Battery Indicator Battery Overcharging Protection Suitable for VL-type Rechargeable Lithium Batteries
APPLICATIONS
* * Solar Powered Watch Solar Powered Equipment
BLOCK DIAGRAM
VDD XPD
LB
MAS6011
SOL
GND
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DA6011.000 15 September 2008
PAD LAYOUT: MAS6011AA3
1040 m
MAS6011 GND XPD
SOL
VDD
LB
DIE size = 1040 mm x 1540 mm PAD size = 80 x 80 m 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 Power Supply Ground Power Down Output Solar Charging Output Power Supply Voltage Low Battery Output
Name GND XPD SOL VDD LB
X-coordinate -129 m 253 m -167 m 102 m 253 m
1540 m
Y-coordinate 563 m 563 m -563 m -563 m -563 m
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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 A) 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
VDD 3.3V 3.2V 3.1V 3.0V 2.9V 2.8V BATTERY CHARGING (VDD RISING) BATTERY DISCHARGING (VDD FALLING) SOL_OFF (charging off) SOL_ON (charging on)
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.
Battery Voltage
LB_OFF (low battery off) XPD_OFF (power down off)
2.7V 2.6V 2.5V 2.4V 2.3V 2.2V 2.1V 2.0V
LB_ON (low battery on)
XPD_ON (power down on)
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 VDD TA TS
Conditions
Min -0.3 -0.3 -20 -50
Max 6.0 VDD+0.3 +60 +125
Unit 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 to +60 typical values at TA = +27 unless otherwise specified. C C, C,
Parameter Supply voltage Current consumption XPD switching level XPD hysteresis XPD output voltage LB switching level LB hysteresis LB output voltage SOL switching level SOL hysteresis SOL sink current SOL leakage current LB_OFF - XPD_OFF LB_ON - XPD_ON SOL_OFF - LB_OFF SOL_ON - LB_ON
TBD = To be defined
Symbol VDD IQ XPD_OFF XPD_ON VXPD(H) VXPD(OUT) LB_OFF LB_ON VLB(H) VLB(OUT) SOL_OFF SOL_ON VSOL(H) ISOL
Conditions
Min 2.0
Typ 3.0 130 2.70 2.30 400 2.0
Max 3.6 2.90 2.50
Unit V nA V mV V
Power Down Off (XPD high) Power Down On (XPD low) VDD = 2.1 V, IXPD = -150 A Low Battery Off (LB low) Low Battery On (LB high) VDD = 2.1 V, ILB = -50 A VDD = 3.0 V, ILB = +50 A 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
2.60 2.35 100
2.75 2.50 250 2.05 0.05 3.25 3.15 100 22
2.90 2.65
V mV V
3.05 2.85 50
3.55 3.45
V mV mA
-50 50 100 350 200 500 650
50 300
nA mV mV mV mV
VLB_XPD_OFF VLB_XPD ON VSOL_LB_OFF VSOL_LB ON
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DA6011.000 15 September 2008
TYPICAL APPLICATION
4.7 F Solar cells
VDD XPD VDD
LB
Watch MCU
GND
Display / Stepper Motors
V BATT 3V
+ -
SOL Schottky diode: Vishay SD103A or similar.
MAS6011
GND
Figure 2. Typical application circuit of MAS6011AA3 - XPD as power on control signal for a microcontroller
4.7 F Solar cells
VDD XPD VDD LB
Watch MCU
GND
Display / Stepper Motors
V BATT 3V
+ -
SOL Schottky diode: Vishay SD103A or similar.
MAS6011
GND
Figure 3. Typical application circuit of MAS6011AA3 - XPD as supply voltage for a low power microcontroller
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DA6011.000 15 September 2008
MAS6011AA3 SAMPLES IN SBDIL 20 PACKAGE
VDD 1 GND 2 NC 3 NC 4 NC 5 NC 6 NC 7 NC 8 NC 9 NC 10
6011AA3 YYWW XXXXX.X
20 SOL 19 NC 18 NC 17 NC 16 NC 15 NC 14 NC 13 NC 12 LB 11 XPD
Top Marking Definitions: YYWW = Year Week XXXXX.X = Lot Number x = Sample Version Number
SBDIL 20 PIN DESCRIPTION
Pin Name VDD GND NC XPD LB NC SOL Pin 1 2 3, 4, 5, 6, 7, 8, 9, 10 11 12 13, 14, 15, 16, 17, 18, 19 20 Type P G DO DO AO Function Positive Power Supply Power Supply Ground Power Down Output Low Battery Output 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 XPD
6
5
4
1234 GAA3 YWW
1
SOL
Top Marking Information: 1234 = Product Number, AA3 = Version Number G = Lead Free, RoHS Compliant Package, YWW = Year Week
2
VDD
3
LB
QFN 3x3 PIN DESCRIPTION
Pin Name SOL VDD LB XPD GND Pin 1 2 3 4 5 6 Type AO P DO DO NC G Solar Charging Output Positive Power Supply Low Battery Output Power Down Output Power Supply Ground Function
NC = Not Connected, P = Power, G = Ground, DO = Digital Output, AO = Analog Output
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DA6011.000 15 September 2008
PACKAGE (QFN 3X3x0.75 6ld) OUTLINE
D D/2 TOP VIEW
E/2
PIN 1 MARK AREA
A
SIDE VIEW
A1
A3
SEATING PLANE
D2
D2/2 L E2/2
SHAPE OF PIN #1 IDENTIFICATION IS OPTIONAL
BOTTOM VIEW EXPOSED PAD
e b
Symbol
Min
Nom
Max
E2
Unit mm mm mm mm mm mm mm mm mm mm
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.
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DA6011.000 15 September 2008
ORDERING INFORMATION
Product Code MAS6011AA3WA300 Product Package Comments
Solar Cell System Manager (for 3 V Tested wafer, thickness 400 rechargeable battery) m 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.
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: info@mas-oy.com
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