©2014 Advanced Linear Devices, Inc., Vers. 2.0 www.aldinc.com 1 of 6
e
EPAD
TM
®
N
A
B
L
E
D
E
A
DVANCED
L
INEAR
D
EVICES,
I
NC.
GENERAL DESCRIPTION
The ALD810016/ALD910016 are members of the ALD8100xx
(quad) and ALD9100xx (dual) family of Supercapacitor Auto Bal-
ancing MOSFETs, or SAB™ MOSFETs. SAB MOSFETs are built
with production proven EPAD
®
technology and are designed to ad-
dress voltage and leakage-current balancing of supercapacitors
connected in series. Supercapacitors, also known as ultracapacitors
or supercaps, connected in series can be leakage-current balanced
by using a combination of one or more devices connected across
each supercapacitor stack to prevent over-voltages.
The ALD810016 offers a set of unique, precise operating voltage
and current characteristics for each of four SAB MOSFET devices,
as shown in its Operating Electrical Characteristics table. It can be
used to balance up to four supercapacitors connected in series.
The ALD910016 has its own set of unique precision Operating Elec-
trical Characteristics for each of its two SAB MOSFET devices,
suitable for up to two series-connected supercapacitors.
Each SAB MOSFET features a precision gate threshold voltage in
the V
t
mode, which is 1.60V when the gate-drain source terminals
(V
GS
= V
DS
) are connected together at a drain-source current of
I
DS(ON)
= 1µA. In this mode, input voltage V
IN
= V
GS
= V
DS.
Dif-
ferent V
IN
produces an Output Current I
OUT
= I
DS(ON)
character-
istic and results in an effective variable resistor that varies in value
exponentially with V
IN
. This V
IN
, when connected across each
supercapacitor in a series, balances each supercapacitor to within
its voltage and current limits.
When V
IN
= 1.60V is applied to an ALD810016/ALD910016, its
I
OUT
is 1µA. For a 100mV increase in V
IN
, to 1.70V, I
OUT
increases
by about tenfold. For an additional increase in V
IN
to 1.82V for the
ALD910016 (1.84V for the ALD810016), I
OUT
increases one hun-
dredfold, to 100µA. Conversely, for a 100mV decrease in V
IN
to
1.50V, I
OUT
decreases to one tenth of its previous value, to 0.1µA.
Another 100mV decrease in input voltage would reduce I
OUT
to
0.01µA. Hence, when an ALD810016/ALD910016 SAB MOSFET
is connected across a supercapacitor that charges to less than
1.40V, it would dissipate essentially no power.
(Continued on next page)
QUAD/DUAL SUPERCAPACITOR AUTO BALANCING (SAB
™
) MOSFET ARRAY
ALD810016/ALD910016
FEATURES & BENEFITS
• Simple and economical to use
• Precision factory trimmed
• Automatically regulates and balances leakage currents
• Effective for supercapacitor charge-balancing
• Balances up to 4 supercaps with a single IC package
• Balances 2-cell, 3-cell, 4-cell series-connected supercaps
• Scalable to larger supercap stacks and arrays
• Near zero additional leakage currents
• Zero leakage at 0.3V below rated voltages
• Balances series and/or parallel-connected supercaps
• Leakage currents are exponential function of cell voltages
• Active current ranges from <0.3nA to >1000µA
• Always active, always fast response time
• Minimizes leakage currents and power dissipation
*IC pins are internally connected, connect to V-
PIN CONFIGURATIONS
SAL PACKAGE
ALD910016
V-
G
N1
D
N1
S
N1
1
2
3
4
I
C
*
G
N2
D
N2
S
N2,
V-
V+
6
7
8
5
SCL PACKAGE
ALD810016
D
N1
G
N1
IC*
D
N4
S
N4
G
N4
S
N1
V-
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
D
N2
G
N2
IC*
D
N3
S
N3
G
N3
S
N2
V+
V-
V-
M2
M1
M4
M3
V-
V-
APPLICATIONS
• Series-connected supercapacitor cell leakage balancing
• Energy harvesting
• Long term backup battery with supercapacitor outputs
• Zero-power voltage divider at selected voltages
• Matched current mirrors and current sources
• Zero-power mode maximum voltage limiter
• Scaled supercapacitor stacks and arrays
PRODUCT FAMILY SPECIFICATIONS
For more information on supercapacitor balancing, how SAB
MOSFETs achieve automatic supercapacitor balancing, the device
characteristics of the SAB MOSFET family, product family product
selection guide, applications, configurations, and package infor-
mation, please download from www.aldinc.com the document:
“ALD8100xx/ALD9100xx Family of Supercapacitor Auto Balanc-
ing (SAB™) MOSFET ARRAYs”
ORDERING INFORMATION
(“L” suffix denotes lead-free (RoHS))
Operating Temperature Range
Package 0°C to +70°C -40°C to +85°C
(Commercial) (Industrial)
16-Pin SOIC ALD810016SCL ALD810016SCLI
8-Pin SOIC ALD910016SAL ALD910016SALI
