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PDF SR10070 Data sheet ( Hoja de datos )
| Número de pieza | SR10070 | |
| Descripción | 1-channel Step-up DC/DC Converter ICs | |
| Fabricantes | Sanyo | |
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Ordering number : EISB*0001A
Ultrathin Miniature Package
SR10000 Series 1-channel Step-up DC/DC
Converter ICs
Overview
The SR10000 Series is a SANYO’s original SIP (System In Package) that includes a DC/DC converter control IC, a
power MOSFET and a Schottky barrier diode. All these components are mounted into one thin-and-small package by
utilizing SANYO’s high-density mounting technology, “Integrated System in Board (ISB)”.
The advantage using this DC/DC converter package is that it greatly decreases its mounting area and space, compared
with when the same circuit is set up with the discrete devices. In addition to that, it is very easy to assemble step-up
switching power supply with by just adding voltage-setting resistance, inductor and capacitors.
Functions and Features
• Since the SR10000 Series packages a voltage step-up DC/DC converter IC as well as power MOSFET and Schottky
barrier diode devices in the same package with the minimum trace length between components, it can provides high
efficiency and superior characteristics including low output ripple. In particular the mounting area required by these
components is reduced when compared to implementations using discrete devices.
• The output voltage is set using an external resistor.
• Standby function: Standby mode current=1µA (maximum)
• Automatic PWM/PFM switching control (SR10020, SR10040, SR10050)
• External PWM/PFM switching control (SR10030, SR10060, SR10070)
• Oscillator frequency: 100kHz (SR10060), 180kHz (SR10030), 300kHz (SR10020, SR10070), 500kHz (SR10040,
SR10050) (accuracy±15%)
• The values given in this data sheet for models SR10060 is tentative and subject to change before
putting into mass production.
Any and all SANYO Semiconductor products described or contained herein do not have specifications
that can handle applications that require extremely high levels of reliability, such as life-support systems,
aircraft's control systems, or other applications whose failure can be reasonably expected to result in
serious physical and/or material damage. Consult with your SANYO Semiconductor representative
nearest you before using any SANYO Semiconductor products described or contained herein in such
applications.
SANYO Semiconductor assumes no responsibility for equipment failures that result from using products
at values that exceed, even momentarily, rated values (such as maximum ratings, operating condition
ranges, or other parameters) listed in products specifications of any and all SANYO Semiconductor
products described or contained herein.
N2206 / 41006HKIM No.0001-1/8
1 page  
SR10000 Series
Equivalent Circuit and Test Peripheral Circuitry
VIN
IIN A
CIN
VIN
10µF
L FOSC
22µH
SR10000 Series
Di
TR
EXT VDD
IC
CE GND FB
VCE
RSENSE
100mΩ
VOUT
CFB
68pF
RFB1
120kΩ
Co
V
10µF
RFB2
45kΩ
Selection rules of external components
1) RFB: Set the ratio of RFB1 and RFB2 to be RFB1+RFB2≤2MΩ and VFB=0.9V.
2) CFB: Set fzfb=1/(2×π×CFB×RFB1) to be within 5kHz to 30kHz.
3) L, Co, RSENSE:
When ceramic capacitor is used for Co: L=10µH, Co=10µF (SR10020, SR10040, SR10050, SR10070)
L=22µH, Co=10µF (SR10030, SR10060)
RSENSE=50mΩ (SR10060), 100mΩ (other than SR10060)
When tantalum capacitor is used for Co: L=10µH, Co=47µF (SR10040, SR10050)
L=22µH, Co=47µF (SR10020, SR10070)
L=47µH, Co=47µF (SR10030, SR10060)
RSENSE=None (shorted)
When electrolytic capacitor is used for Co: L=22µH, Co=100µF//2.2µF ceramic (SR10020, SR10070)
L=47µH, Co=100µF//2.2µF ceramic (SR10030, SR10060)
RSENSE=None (shorted)
These constants of the components above should be changed if necessary for larger step-up ratio VOUT/VIN
and larger output current IOUT using the expression shown below as a reference.
Co=(Standard Co*) × (IOUT (mA) / 300mA × VOUT/VIN)
* Standard Co: values shown above
No.0001-5/8
5 Page | ||
| Páginas | Total 8 Páginas | |
| PDF Descargar | [ Datasheet SR10070.PDF ] | |
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