IRNBPS1 International Rectifier, IRNBPS1 Datasheet - Page 4

• Manufacturer Part Number: IRNBPS1
• Description: KIT DESIGN PENTIUM II IRF7805/7
• Manufacturer: International Rectifier

Specifications of IRNBPS1

• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Other names: *IRNBPS1

IRNBPS1
Static Performance
High efficiency is expected in a mobile CPU
converter. Thanks to the application specific
IRF7805 & IRF7807 MOSFETs, the
efficiency is kept high throughout low load
Fig 3. Typical Efficiency, Constant Frequency PWM
Fig 6. Typical T
V
out
= 1.6V, fs = 300kHz, +5V ext.
j
Efficiency
of Q1 T
(still air)
a
= 25ºC, V
out
= 1.6V
IR SOUTHEAST ASIA: 315 Outram Road, #10-02 Tan Boon Liat Building, Singapore 0316 Tel: [phone]
IR FAR EAST: K&H Bldg., 2F, 3-30-4 Nishi-Ikebukuro, Toshima-ku, Tokyo 171 Japan Tel: [phone]
EUROPEAN HEADQUARTERS: Hurst Green, Oxted, Surrey RH8 9BB, UK Tel: ++ 44 1883 732020
Measurement of Q1 & Q2 junction
temperatures shows that they remain low at
an ambient temperature of 25°C, even in still
air.
maintain sufficient margin under the
component temperature ratings.
to full load at V
Efficiency could be boosted up if the sense
resistor was eliminated as in voltage mode
schemes (Figure 4).
Fig 4. Calculated Efficiency with R
WORLD HEADQUARTERS: 233 Kansas St., El Segundo, California 90245, Tel: [phone]
Maximum Junction Temperature
http://www.irf.com/
Operation under 50°C ambient will
V
out
= 1.6V, fs = 300kHz, +5V ext.
IR GERMANY: Saalburgstrasse 157, 61350 Bad Homburg Tel: ++ 49 6172 96590
IR CANADA: 15 Lincoln Court, Brampton, Ontario L6T 3Z2, Tel: [phone]
out
= 1.6V (Figure 3).
IR ITALY: Via Liguria 49, 10071 Borgaro, Torino Tel: ++ 39 11 451 0111
Data and specifications subject to change without notice.
SENSE
Removed, PWM
The efficiency also increases if the output
voltage is raised to 1.8V, such as for existing
CPU voltage rails (Figure 5).
Fig 5. Typical Efficiency, Constant Frequency PWM
Fig 7. Typical T
V
out
= 1.8V, fs = 300kHz, +5V ext.
International
j
of Q2 T
(still air)
a
= 25ºC, V
Rectifier
out
= 1.6V
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