IR3080MTRPBF International Rectifier, IR3080MTRPBF Datasheet - Page 27

• Manufacturer Part Number: IR3080MTRPBF
• Description: IC CONTROLLER PHASE 32LMLPQ
• Manufacturer: International Rectifier
• Series: XPhase™r

Specifications of IR3080MTRPBF

• Applications: Processor
• Current - Supply: 11mA
• Voltage - Supply: 9.5 V ~ 14 V
• Operating Temperature: 0°C ~ 100°C
• Mounting Type: Surface Mount
• Package / Case: 32-MLPQ
• Ic Function: Control IC With VCCVID And Overtemp Detect
• Supply Voltage Range: 9.5V To 14V
• Operating Temperature Range: 0°C To +100°C
• Digital Ic Case Style: MLPQ
• No. Of Pins: 32
• Filter Terminals: SMD
• Rohs Compliant: Yes
• Controller Type: PWM
• Package: 32-Lead MLPQ
• Circuit: X-Phase Control IC
• Switch Freq (khz): 150kHz to 1.0MHz
• Pbf: PbF Option Available
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: IR3080MPBFTR; IR3080MTRPBF; IR3080MTRPBFTR

DESIGN EXAMPLE 1 - VRD 10 CONVERTER
SPECIFICATIONS
Input Voltage: V
DAC Voltage: V
No Load Output Voltage Offset: V
Output Current: I
Maximum Output Current: I
Output Impedance: R
VCC Ready to VCC Power Good Delay: t
VID Delay Time: t
Soft Start Time: t
Over Current Delay: t
Dynamic VID Down-Slope Slew Rate: SR
Over Temperature Threshold: T
POWER STAGE
Phase Number: n=6
Switching Frequency: f
Output Inductors: L=220 nH, R
Output Capacitors: AL-Polymer, C=560uF, R
IR3080 EXTERNAL COMPONENTS
Oscillator Resistor Rosc
Once the switching frequency is chosen, R
frequency of 400kHz per phase, choose R
VID Delay Capacitor C
Given VID delay time t
Soft Start Capacitor C
Because faster over-current protection is required, the soft start capacitor C
R
Calculate the soft start resistor from the required over current delay time t
The soft start delay time is
C
C
t
R
SSDEL
VIDDEL
SS/DEL
SS
SS
/
/
Page 27
DEL
DEL
=
=
=
C
=
is used. Calculate the soft start capacitor from the required soft start time.
SS
66
. 0
I
CHG
/
09
*
DEL
10
V
. 3
−
O
∗
DAC
−
I
91
∗
t
=12 V
O
6
SS
t
OCDEL
I
1 (
VID
SS
*
=105 ADC
DISCHG
3 .
=2mS
t
=1.35 V
VID
C
I
=2.5mS
=
−
OCDEL
CHG
O
SS
VID
∗
=0.91 mΩ
SW
70
R
=
SS/DEL
/
VIDDEL
. 1
I
SS
DEL
DISCHG
*
66
=400 kHz
35
=2.5mS
/
10
DEL
OMAX
=0.5mS
*
−
−
10
6
20
∗
and Resistor R
L
∗
−
PCB
=0.47 mΩ
I
=
6
. 3
=120 ADC
*
2
CHG
∗
O_NLOFST
,
10
. 0
91
*
the capacitor can is,
2
10
=115 ºC
09
5 .
−
)
3
−
*
=
−
3
10
. 0
0
=
VccPG
5 .
DOWN
−
* 1
OSC
3
0
6
=20 mV
*
1 .
*
=
10
10
. 0
10
C
uF
OSC
42
= 7mΩ, Number Cn=10
=30.1kΩ
* 1
−
SS/DEL
−
=0-10mS
−
6
=2.5mV/uS
3
6
nF
∗
10
∗
1 (
6
can be determined from the curve in Figure 13. For switching
−
, choose 47nF
3 .
*
6
70
10
−
*
10
−
10
6
*
=
−
10
6
10
3
k
*
Ω
70
*
10
−
6
)
=
OCDEL
. 0
86
mS
,
SS/DEL
in series with the resistor
IR3080PbF