S-882Z Series
www.sii-ic.com
© Seiko Instruments Inc., 2005-2010
ULTRA-LOW VOLTAGE OPERATION CHARGE PUMP IC
FOR STEP-UP DC-DC CONVERTER STARTUP
Rev.2.0
_00
The S-882Z Series is a charge pump IC for step-up DC-DC converter startup, which differs from conventional charge pump
ICs, in that it uses fully depleted SOI (Silicon on Insulator) technology to enable ultra-low voltage operation.
Being capable of stepping up an extremely low input voltage of 0.3 to 0.35 V, this series enables the efficient use of very low
energy levels. The stepped up electric power is stored in a startup capacitor, and it is discharged as the startup power of the
step-up DC-DC converter when the startup capacitor reaches the discharge start voltage level.
Moreover, a built-in shutdown function is also provided, so that when the output voltage of the connected step-up DC-DC
converter rises above a given value, the operation is stopped, thereby achieving significant power saving and battery life
extension.
The S-882Z Series chips come in a small SOT-23-5 package, allowing high-density mounting.
Features
•
Operating input voltage
•
Current consumption
•
•
•
•
•
0.3 to 3.0 V
During operation : 0.5 mA max. (at V
IN
=
0.3 V)
During shutdown : 0.6
μA
max. (at V
IN
=
0.3 V)
Discharge start voltage 1.8 to 2.4 V (selectable in 0.2 V steps)
Shutdown voltage
Discharge start voltage
+
0.1 V (fixed)
Oscillation frequency
350 kHz typ. (at V
IN
=
0.3 V)
*1
External component
Startup capacitor (C
CPOUT
), 1 unit
Lead-free, Sn 100%, halogen-free
*2
*1.
The addition of a Schottky diode or a power smoothing capacitor may be necessary depending on the output
smoothing capacitor value of the step-up DC-DC converter and the output voltage value. (Refer to
Example of
Connection with Step-up DC-DC Converter.)
*2.
Refer to “
Product Name Structure”
for details.
Applications
•
Stepping up from low-voltage power supply such as solar cell and fuel cell
•
Stepping up internal power supply voltage of RF tag
•
Intermittent power supply to intermittently operating system
Package
•
SOT-23-5
Seiko Instruments Inc.
1
ULTRA-LOW VOLTAGE OPERATION CHARGE PUMP IC FOR STEP-UP DC-DC CONVERTER STARTUP
Rev.2.0
_00
S-882Z Series
Block Diagram
C
CPOUT
CPOUT
5
*1
VIN
4
*1
Charge pump circuit
COMP1
−
+
V
REF
EN−
−
+
COMP2
2
1
M1
*1
OUT
CLK signal
Oscillation
circuit
3
*1
VM
VSS
*1.
Parasitic diode
Figure 1
2
Seiko Instruments Inc.
ULTRA-LOW VOLTAGE OPERATION CHARGE PUMP IC FOR STEP-UP DC-DC CONVERTER STARTUP
Rev.2.0
_00
S-882Z Series
Product Name Structure
The discharge start voltage for the S-882Z Series can be selected at the user’s request. Refer to
“1. Product
Name”
for the definition of the product name,
“2. Package”
regarding the package drawings and
“3. Product
Name List”
for the full product names.
1.
Product Name
S-882Z
xx -
M5T1
x
Environmental code
U: Lead-free (Sn 100%), halogen-free
G: Lead-free (for details, please contact our sales office)
Package name (abbreviation) and packing specifications
*1
M5T1 : SOT-23-5, tape
Discharge start voltage
18 : 1.8 V
20 : 2.0 V
22 : 2.2 V
24 : 2.4 V
*1.
Refer to the taping specifications at the end of this book.
2.
Package
Package Name
SOT-23-5
3.
Product Name List
Package
MP005-A-P-SD
Drawing Code
Tape
MP005-A-C-SD
Reel
MP005-A-R-SD
Table 1
Discharge Start Voltage
Shutdown Voltage
Product Name
1.8 V
±
0.1 V
1.9 V
±
0.1 V
S-882Z18-M5T1x
2.0 V
±
0.1 V
2.1 V
±
0.1 V
S-882Z20-M5T1x
2.2 V
±
0.1 V
2.3 V
±
0.1 V
S-882Z22-M5T1x
2.4 V
±
0.1 V
2.5 V
±
0.1 V
S-882Z24-M5T1x
Remark 1.
Contact the SII marketing department for products with discharge start voltage other than those specified
above.
2.
x: G or U
3.
Please select products of environmental code = U for Sn 100%, halogen-free products.
Seiko Instruments Inc.
3
ULTRA-LOW VOLTAGE OPERATION CHARGE PUMP IC FOR STEP-UP DC-DC CONVERTER STARTUP
Rev.2.0
_00
S-882Z Series
Pin Configurations
SOT-23-5
Top view
5
4
Table 2
Pin No. Pin Name
1
2
3
4
5
OUT
VSS
VM
VIN
CPOUT
Pin Description
Output pin (step-up DC-DC converter connection pin)
GND pin
Step-up DC-DC converter output voltage monitor pin
Power supply input pin
Startup capacitor connection pin
1
2
3
Figure 2
Absolute Maximum Ratings
Table 3
(Ta
=
25°C unless otherwise specified)
Parameter
VIN pin voltage
CPOUT pin voltage
OUT pin voltage
VM pin voltage
Power dissipation
Symbol
V
IN
V
CPOUT
V
OUT
V
VM
P
D
Absolute Maximum Rating
V
SS
−
0.3 to V
SS
+
3.3
V
SS
−
0.3 to V
SS
+
3.3
V
SS
−
0.3 to V
SS
+
3.3
V
SS
−
0.3 to V
SS
+
3.3
300 (When not mounted on board)
600
*1
−40
to
+85
−40
to
+125
Unit
V
V
V
V
mW
mW
°C
°C
Operating ambient temperature
T
opr
Storage temperature
T
stg
*1.
When mounted on board
[Mounted board]
(1) Board size: 114.3 mm
×
76.2 mm
×
t1.6 mm
(2) Board name: JEDEC STANDARD51-7
Caution The absolute maximum ratings are rated values exceeding which the product could suffer
physical damage. These values must therefore not be exceeded under any conditions.
700
Power Dissipation (P
D
) [mW]
600
500
400
300
200
100
0
0
100
150
50
Ambient Temperature (Ta) [°C]
Figure 3 Power Dissipation of Package (When Mounted on Board)
4
Seiko Instruments Inc.
ULTRA-LOW VOLTAGE OPERATION CHARGE PUMP IC FOR STEP-UP DC-DC CONVERTER STARTUP
Rev.2.0
_00
S-882Z Series
Electrical Characteristics
Table 4
(Ta
=
25°C unless otherwise specified)
Parameter
Discharge start
*1
voltage
Discharge stop
*2
voltage
Symbol
V
CPOUT1
V
CPOUT2
V
IN
=
0.35 V
V
CPOUT1(S)
=
1.8 V
V
CPOUT1(S)
=
2.0 V
V
CPOUT1(S)
=
2.2 V
V
CPOUT1(S)
=
2.4 V
Operating input
*3
voltage
V
IN
V
CPOUT1(S)
=
1.8 to 2.4 V,
Ta
= −40
to
+85°C
V
CPOUT1(S)
=
1.8, 2.0 V,
Ta
= −30
to
+60°C
Not externally connected, voltage
applied to V
IN
V
CPOUT
=
1.8 to 2.4 V,
I
OUT
=
3 mA
V
IN
=
0.35 V, C
CPOUT
=
10
μF
Ta
= −40
to
+85°C
V
IN
=
0.3 V, V
CPOUT
=
0 V
V
IN
=
0.6 V, V
CPOUT
=
0 V
V
IN
=
1.0 V, V
CPOUT
=
0 V
V
IN
=
0.3 V, V
CPOUT
=
0 V, V
VM
=
3.0 V
V
IN
=
0.6 V, V
CPOUT
=
0 V, V
VM
=
3.0 V
V
IN
=
1.0 V, V
CPOUT
=
0 V, V
VM
=
3.0 V
V
IN
=
2.0 V, V
CPOUT
=
0 V, V
VM
=
3.0 V
Conditions
Min.
Typ.
Max.
V
CPOUT1(S)
+
0.1
V
CPOUT1
−
0.33
V
CPOUT1
−
0.33
V
CPOUT1
−
0.33
V
CPOUT1
−
0.33
3.0
3.0
0.3
100
25
±550
0.5
1.5
3.0
0.6
0.7
0.7
0.8
Unit
V
V
V
V
V
V
V
V
Ω
s
ppm/°C
mA
mA
mA
μA
μA
μA
μA
Measurement
Circuit
V
CPOUT1(S)
V
CPOUT1(S)
−
0.1
V
CPOUT1
−
−
0.60
V
CPOUT1
−
−
0.67
V
CPOUT1
−
−
0.74
V
CPOUT1
−
−
0.80
0.35
0.30
−
−
−
−
−
−
−
−
−
−
−
−
−
−
34
7
±150
0.1
0.5
1.2
−
−
−
−
1
1
1
1
1
2
2
−
3
2
−
4
4
4
5
5
5
5
Oscillation start
V
ST
voltage
Discharge
control switch
R
M1
resistance
Discharge start
t
OUT
delay time
*4
Discharge start
Δ
V
CPOUT1
voltage
temperature
Δ
Ta
•
V
CPOUT1
coefficient
I
SS
Current
consumption
during operation
Current
I
SSS
consumption
during shutdown
V
OFF(S)
V
OFF(S)
Shutdown
V
OFF
V
OFF(S)
V
6
V
IN
=
0.3 V, V
CPOUT
=
0 V
*5
voltage
−
0.1
+
0.1
Shutdown
Δ
V
OFF
voltage
Ta
= −40
to
+85°C
−
±150
±550
ppm/°C
−
temperature
Δ
Ta
•
V
OFF
coefficient
Discharge
V
IN
=
V
CPOUT
=
0 V,
I
LEAK
control switch
0.1
7
−
−
μA
*6
V
OUT
=
V
VM
=
3.0 V
leak current
VM pin input
I
VM
1.0
1.9
8
V
VM
=
3.0 V
−
μA
current
Oscillation
350
kHz
f
OSC
V
IN
=
0.3 V
−
−
−
frequency
*1.
V
CPOUT1
: Actual discharge start voltage value, V
CPOUT1(S)
: Discharge start voltage setting value
*2.
Voltage at which discharge to the OUT pin stops
*3.
Input voltage required to start discharge to the OUT pin from the startup capacitor
*4.
Delay time from when power is input to the VIN pin until the electric charge of the startup capacitor is discharged to the
OUT pin
*5.
V
OFF
: Actual shutdown voltage value (VM pin voltage value at which shutdown actually occurs)
V
OFF(S)
: Shutdown voltage setting value (VM pin voltage setting value at which shutdown occurs)
V
OFF(S)
is automatically set to V
CPOUT1(S)
+
0.1 V.
*6.
Current that flows into the IC from the OUT pin due to the off-leak current of the discharge control switch
Caution The voltage that is input to the connected step-up DC-DC converter varies according to the consumption
current of the step-up DC-DC converter and the power smoothing capacitor. Set the discharge start
voltage based on thorough evaluation including the temperature characteristics under the actual usage
conditions.
Seiko Instruments Inc.
5
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