Rohm BU90030G Silicon monolithic integrated circuit Datasheet

1/4
Structure
Function
Voltage Regulated Charge Pump IC
Silicon Monolithic Integrated Circuit
Product
BU90030G
- Input voltage range 2.0V~4.0V
- PFM operation
- Output voltage 4.0V (typ)
- 1.5MHz(typ) switching frequency.
- SSOP6 package
Function
Absolute Maximum rating(Ta=25c)
Item
Maximum input power
supply voltage
Symbol
Rating
Unit
VCC
-0.3 ~ 7
V
Maximum input voltage
CP, CN, SHD, VOUT
-0.3 ~ 7
V
Power dissipation
Operating temperature
range
Storage temperature
range
Junction temperature
Pd
675 (*1)
mW
Topr
-35~+85
C
Tstg
-55~+125
C
Tjmax
+125
C
*1 When mounted on the specified PCB (70mm×70mm×1.6mm glass epoxy).
Deducted by 6.75mW/c when used over Ta=25c.
Operating range (Ta=25c)
Item
Symbol
Rating
Unit
Min.
Typ.
Max.
VBAT
2.0
-
4.0
V
Flying Capacitor
Cfly
0.1
-
1.0
uF
Output Capacitor
CCPOUT
1.0
-
10
uF
Maximum Output Current
IOMAX
-
-
80
mA
Power supply voltage
REV. A
Condition
VCC=2.5V,
Cfly=1.0uF,
COUT=1.0uF
2/4
Electrical characteristics (unless otherwise specified VBAT=2.5[v], Ta=25[c])
Item
Symbol
Rating
Min.
Typ.
Max.
Unit
Condition
【Voltage Control part】
Output voltage 1
Vcpout1
3.8
4.0
4.2
V
Cfly=COUT=1uF
Output voltage 2
Vcpout2
3.6
-
-
V
VCC=2.0V, IOUT=40mA,
Cfly=COUT=1.0uF
Fosc
1.0
1.5
2.0
MHz
VCC=2.0V, VOUT=3.8V,
VOUT=40mA
RDIS
300
600
900
Ω
VCC=2.5V, VOUT=4.0V
RSHD
VSHDH
VSHDL
100
1.4
0
200
-
400
4.0
0.4
kΩ
V
V
ISHD
-
0
5
uA
【Oscillator circuit】
MaximumOscillator frequency
【Output discharge circuit】
Discharge resistor
【SHD part】
SHD pin pull down resistor
SHD pin control Operation
voltage
Non operation
【Circuit current】
Circuit current at shutdown
* No design for durability against radiation
A R
Lot No.
External dimention/Pin layout
1PIN MARK
Block diagram
REV. A
3/4
Cfly
CP
CN
VCC
VOUT
CIN
Driver + FET
COUT
CONTROL
SHD
ON/OFF
OSC
+
-
LOGIC
VREF
GND
Pin number/name/function
Pin nr
1
2
3
4
5
6
Name
VOUT
GND
SHD
CN
VCC
CP
Function
Starting charge pump output pin
GND pin
Shutdown pin
Flying Capacitor L side input pin
Power supply input pin
Flying Capacitor H side input pin
Operation Notes
REV. A
4/4
1.) Absolute maximum ratings
An excess in the absolute maximum rating, such as supply voltage, temperature range of operating conditions, etc., can
break down the devices, thus making impossible to identify breaking mode, such as a short circuit or an open circuit.
If any over rated values will expect to exceed the absolute maximum ratings, consider adding circuit protection devices,
such as fuses.
2.) GND voltage
The potential of GND pin must be minimum potential in all condition. As an exception, the circuit design allows voltages
up to -0.3 V to be applied to the IC pin.
3.) Thermal design
Use a thermal design that allows for a sufficient margin in light of the power dissipation (Pd) in actual operating conditions
4.) Inter-pin shorts and mounting errors
Use caution when positioning the IC for mounting on printed circuit boards. The IC may be damaged if there is any
connection error or if pins are shorted together.
5.) Actions in strong electromagnetic field
Use caution when using the IC in the presence of a strong electromagnetic field as doing so may cause the IC to malfunction
6.) Mutual impedance
Power supply and ground wiring should reflect consideration of the need to lower mutual impedance and minimize ripple
as much as possible (by making wiring as short and thick as possible or rejecting ripple by incorporating inductance
and capacitance).
7.) Regarding input pin of the IC
This monolithic IC contains P+ isolation and P substrate layers between adjacent elements in order to keep them isolated.
P-N junctions are formed at the intersection of these P layers with the N layers of other elements, creating a parasitic diode
or transistor. For example, as shown in the figures below, the relation between each potential is as follows:
When GND > Pin A and GND > Pin B, the P-N junction operates as a parasitic diode.
When GND > Pin B, the P-N junction operates as a parasitic transistor.
Parasitic diodes can occur inevitable in the structure of the IC. The operation of parasitic diodes can result in
mutual interference among circuits, operational faults, or physical damage. Accordingly, methods by which parasitic diodes
operate, such as applying a voltage that is lower than the GND (P substrate) voltage to an input pin, should not be used.
8.) Thermal shutdown Circuit (TSD Circuit)
This model IC has a built-in TSD circuit. This circuit is only to cut off the IC from thermal runaway, and has not been
design to protect or guarantee the IC.
Therefore, the user should not plan to activate this circuit with continued operation
in mind.
9.) External Component
Use a small ESR ceramic capacitor for the external capacitor (CIN,COUT,Cfly) and set them nearby IC.
Use the CIN capacitor’s value that meets this condition
( CIN≧COUT ).
And Use the Cfly capacitor’s value that meets this condition
( Cfly≦COUT ).
There may be a case that it doesn’t achieve the objective characteristic because the capacity come down lower than the
normal capacitor because of the bias voltage and the temperature when using a small layered ceramic capacitor.
Therefore, the user should use it after checking the DC bias capacity and other characteristics.
REV. A
Notice
Notes
No copying or reproduction of this document, in part or in whole, is permitted without the
consent of ROHM Co.,Ltd.
The content specified herein is subject to change for improvement without notice.
The content specified herein is for the purpose of introducing ROHM's products (hereinafter
"Products"). If you wish to use any such Product, please be sure to refer to the specifications,
which can be obtained from ROHM upon request.
Examples of application circuits, circuit constants and any other information contained herein
illustrate the standard usage and operations of the Products. The peripheral conditions must
be taken into account when designing circuits for mass production.
Great care was taken in ensuring the accuracy of the information specified in this document.
However, should you incur any damage arising from any inaccuracy or misprint of such
information, ROHM shall bear no responsibility for such damage.
The technical information specified herein is intended only to show the typical functions of and
examples of application circuits for the Products. ROHM does not grant you, explicitly or
implicitly, any license to use or exercise intellectual property or other rights held by ROHM and
other parties. ROHM shall bear no responsibility whatsoever for any dispute arising from the
use of such technical information.
The Products specified in this document are intended to be used with general-use electronic
equipment or devices (such as audio visual equipment, office-automation equipment, communication devices, electronic appliances and amusement devices).
The Products specified in this document are not designed to be radiation tolerant.
While ROHM always makes efforts to enhance the quality and reliability of its Products, a
Product may fail or malfunction for a variety of reasons.
Please be sure to implement in your equipment using the Products safety measures to guard
against the possibility of physical injury, fire or any other damage caused in the event of the
failure of any Product, such as derating, redundancy, fire control and fail-safe designs. ROHM
shall bear no responsibility whatsoever for your use of any Product outside of the prescribed
scope or not in accordance with the instruction manual.
The Products are not designed or manufactured to be used with any equipment, device or
system which requires an extremely high level of reliability the failure or malfunction of which
may result in a direct threat to human life or create a risk of human injury (such as a medical
instrument, transportation equipment, aerospace machinery, nuclear-reactor controller, fuelcontroller or other safety device). ROHM shall bear no responsibility in any way for use of any
of the Products for the above special purposes. If a Product is intended to be used for any
such special purpose, please contact a ROHM sales representative before purchasing.
If you intend to export or ship overseas any Product or technology specified herein that may
be controlled under the Foreign Exchange and the Foreign Trade Law, you will be required to
obtain a license or permit under the Law.
Thank you for your accessing to ROHM product informations.
More detail product informations and catalogs are available, please contact us.
ROHM Customer Support System
http://www.rohm.com/contact/
www.rohm.com
© 2010 ROHM Co., Ltd. All rights reserved.
R1010A
Similar pages