PCMCIA / Flash memory power supply
BP5310A
The BP5310A is a DC / DC converter for supplying power to PCMCIA flash memory. From a power supply (+5V)
for PCMCIA operations, the module supplies a voltage for programming operations (+12V).
Applications
Personal computers, CD-ROM players, personal digital assistants, and other PCMCIA-slot equipped devices
Features
1) Designed to provide power for PCMCIA/flash memory programming operations (output voltage=12V±5%;
output current=120mA)
2) The 5V operating voltage is same as the IC memory card operating voltage.
3) Built-in protection circuit for shorted-circuit.
4) Compact 9-pin SIP package.
5) Surface mounting is possible because parts are concentrated on one side.
Absolute maximum ratings (Ta=25°C)
Parameter
Symbol
V
IN
Topr
Tstg
Limits
7
0
∼
60
Unit
V
Input voltage
Operating temperature range
Storage temperature range
°C
°C
−
30
∼ +
85
1/5
BP5310A
Electrical characteristics
Parameter
Input voltage
Output current
Output voltage
Ripple noise voltage
Efficiency
ON/OFF CTL voltage when ON
ON/OFF CTL voltage when OFF
ON/OFF CTL sink current
when ON
ON/OFF CTL source current
when OFF
∗1
Measured with a band width of 20 MHz.
∗2
Ensure that the HIGH signal of the CTL pin(pin 8)rises in less than 100µS to the level at which the output turns on.
(unless otherwise noted, Ta=25°C, V
CTL
=5V)
Symbol
V
IN
I
OUT
V
OUT
υ1
η
V
CTL
V
CTL
I
SINK
I
SOURCE
Min.
4.75
−
11.4
−
65
3.3
−
−
−
Typ.
5.00
−
12.0
100
73
−
−
0.8
1.0
Max.
5.25
120
12.6
200
−
−
0.4
1.3
1.5
Unit
V
mA
V
mV
PP
%
V
V
mA
mA
Conditions
V
IN
=
4.75∼5.25V
I
OUT
=
0~120mA
V
IN
=
5V, I
OUT
=
60mA
V
IN
=
5V, I
OUT
=
60mA
V
IN
=
5V, V
OUT
≥11.4V
V
IN
=
4.75∼5.25V
V
IN
=
5V
V
CTL
=
3.3V
V
IN
=
5V
V
CTL
=
0.4V
∗3
∗4
∗2
∗1
3.3V
0V
Less than 100µS
∗3
When the HIGH signal is applied to the CTL pin , a current flows into the CTL pin for a short period until the output rises. Little current flows thereafter.
∗4
When the LOW signal is applied to the CTL pin to turn OFF the output, a current flows from the CTL pin for a short period until the output drops to 0V.
Ensure that the control circuit can sink this current.
Pin descriptions
Pin No.
1
Pin name
Co
Function
Output smoothing capacitor connection pin; connect a
low-impedance capacitor with a recommended
capacitance of 47µF between this pin and GND
Output pin; connect an output capacitor with a
recommended capacitance of 2.2µF between this pin
and GND
Test pin; use this internally connected pin in OPEN mode
Ground pin
Output ON/OFF control pin; output starts when the pin is
HIGH level, and stops at LOW level
Input pin; connect a low-impedance capacitor with a
recommended capacitance of 100µF between this pin
and GND
2
3
4, 7
8
V
OUT
TP
GND
V
CTL
9
V
IN
2/5
BP5310A
(2) Pull-down of VPP
BP5310A
1
V
PP
+
C2
+
2
3
4
7
8
9
Be sure to use
fuse for safety
+
C3
C1
V
CC
(5V)
ON / OFF CTL
Fig.3
The OFF output is pulled down through an effective resistance of 30kW
Operation notes
(1) Place I / O external capacitors as near as possible to the connection pins. In particular, make sure to
minimize the impedance between the input-side capacitor (C1) and pin 9. (Reference Value : A length less
than 50mm for a copperfoil of 1.0mm wide and 35µm thickness.)
(2) Avoid frequent switching using the ON / OFF CTL pin (five times per second at the maximum).
(3) The module has a built-in shorted-circuit protection circuit. Shorted-circuiting is assumed if the output
voltage does not reach 4.2V (typical) in 40ms (typical), and the protection circuit starts to operate.
When setting the output capacitor, we recommend considering the flash memory capacitance within
the IC card and making the output voltage to reach 8V or more in less than 20ms.
External dimensions (Units : mm)
26.5Max.
6.0Max.
Marked
side
16.0Max.
3±0.5
1
2
3
4
0.5±0.1
1.3±0.2
7
8
9
0.25±0.05
P=2.54±0.2
1.3±1.2
2.54×8=20.32
∗Pins
5 and 6 are not installed.
SIP9
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Precautions on Use of ROHM Power Module
Safety Precautions
1) The products are designed and produced for application in ordinary electronic equipment (AV equipment,
OA equipment, telecommunication equipment, home appliances, amusement equipment etc.).
If the products are to be used in devices requiring extremely high reliability (medical equipment, transport
equipment, aircraft/spacecraft, nuclear power controllers, fuel controllers, car equipment including car
accessories, safety devices, etc.) and whose malfunction or operational error may endanger human life
and sufficient fail-safe measures, please consult with the Company's sales staff in advance. If product
malfunctions may result in serious damage, including that to human life, sufficient fail-safe measures
must be taken, including the following:
[a] Installation of protection circuits or other protective devices to improve system safety
[b] Installation of redundant circuits in the case of single-circuit failure
2) The products are designed for use in a standard environment and not in any special environments.
Application of the products in a special environment can deteriorate product performance. Accordingly,
verification and confirmation of product performance, prior to use, is recommended if used under the
following conditions:
[a] Use in various types of liquid, including water, oils, chemicals, and organic solvents
[b] Use outdoors where the products are exposed to direct sunlight, or in dusty places
[c] Use in places where the products are exposed to sea winds or corrosive gases, including
Cl2, H2S, NH3, SO2, and NO2
[d] Use in places where the products are exposed to static electricity or electromagnetic waves
[e] Use in proximity to heat-producing components, plastic cords, or othe flammable items
[f] Use involving sealing or coating the products with resin or other coating materials
[g] Use involving unclean solder or use of water or water-soluble cleaning agents for cleaning after
soldering
[h] Use of the products in places subject to dew condensation
3) The products are not radiation resistant.
4) The Company is not responsible for any problems resulting from use of the products under conditions not
recommended herein.
5) The Company should be notified of any product safety issues. Moreover, product safety issues should be
periodically monitored by the customer.
Precautions Regarding Application Example and External Circuits
1) If change is made to the constant of an external circuit, allow a sufficient margin due to variations of the
characteristics of the products and external components, including transient characteristics, as well as
static characteristics. Please be informed that the Company has not conducted investigations on whether
or not particular changes in the application examples or external circuits would result in the infringement
of patent rights of a third party.
2) The application examples, their constants, and other types of information contained herein are applicable
only when the products are used in accordance with standard methods.
Therefore, if mass production is intended, sufficient consideration to external conditions must be made.
Prohibitions Regarding Industrial Property
1) These Specifications contain information related to the Company’s industrial property. Any use of them
other than pertaining to the usage of appropriate products is not permitted. Duplication of these
Specifications and its disclosure to a third party without the Company’s permission is prohibited.
2) Information and data on products, including application examples, contained in these specifications are
simply for reference; the Company does not guarantee any industrial property rights, intellectual property
rights, or any other rights of a third party regarding this information or data. Accordingly, the Company
does not bear any responsibility for:
[a] infringement of the intellectual property rights of a third party
[b] any problems incurred by the use of the products listed herein.
3) The Company prohibits the purchaser of its products to exercise or use the intellectual property rights,
industrial property rights, or any other rights that either belong to or are controlled by the Company, other
than the right to use, sell, or dispose of the products.
5/5
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