ADP1882ARMZ-0.3-R7 Analog Devices Inc, ADP1882ARMZ-0.3-R7 Datasheet - Page 30

• Manufacturer Part Number: ADP1882ARMZ-0.3-R7
• Description: IC PWM BUCK CURRENT MODE 10MSOP
• Manufacturer: Analog Devices Inc

Specifications of ADP1882ARMZ-0.3-R7

• Package / Case: 10-MSOP, Micro10™, 10-uMAX, 10-uSOP
• Voltage - Supply: 2.75 V ~ 20 V
• Frequency-max: 300kHz
• Operating Temperature: -40°C ~ 125°C
• Number Of Outputs: 1
• Duty Cycle: 84%
• Pwm Type: Current Mode
• Buck: Yes
• Boost: No
• Flyback: No
• Inverting: No
• Doubler: No
• Divider: No
• Cuk: No
• Isolated: No
• Primary Input Voltage: 13V
• No. Of Outputs: 1
• Output Current: 25A
• No. Of Pins: 10
• Operating Temperature Range: -40°C To +125°C
• Msl: MSL 3 - 168 Hours
• Peak Reflow Compatible (260 C): Yes
• Leaded Process Compatible: Yes
• Rohs Compliant: Yes
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

ADP1882/ADP1883
Loss Calculations
Duty cycle = 1.8/12 V = 0.15.
R
t
V
C
Q
R
BODY(LOSS)
ON (N2)
GATE
F
IN
N1,N2
= 0.84 V (MOSFET forward voltage).
= 3.3 nF (MOSFET gate input capacitance).
= (0.15 × 0.0054 + 0.85 × 0.0054) × (15 A)
= 1.215 W
= 20 ns × 300 × 10
= 151.2 mW
P
P
= 1.5 Ω (MOSFET gate input resistance).
= 17 nC (total MOSFET gate charge).
N1,N2(CL)
BODY
= 5.4 mΩ.
= 20 ns (body conduction time).
(
LOSS
=
)
[
=
D
t
×
BODY
R
t
N1(ON)
SW
3
(
× 15 A × 0.84 × 2
LOSS
)
+
×
(
1
I
−
LOAD
D
)
×
×
R
V
N2(ON)
F
×
2
]
I ×
2
LOAD
2
Rev. 0 | Page 30 of 40
P
= 300 × 103 × 1.5 Ω × 3.3 × 10 − 9 × 15 A × 12 × 2
= 534.6 mW
+
= (5.12 × (300 × 10
+ (5.5 × (300 × 10
= 77.13 mW
P
P
P
P
= 1.215 W + 151.2 mW + 534.6 mW + 77.13 mW +
3.15 mW + 675 mW + 56.25 mW
= 2.62 W
P
SW(LOSS)
COUT
DCR(LOSS)
CIN
LOSS
DR
[
V
= (I
(
DD
= P
LOSS
= (I
×
= f
RMS
N1,N2
= DCR ×
RMS
)
(
SW
f
)
=
2
SW
)
+ P
× ESR = (7.5 A)
2
× R
[
V
× ESR = (1.5 A)
C
DR
upperFET
BODY(LOSS)
GATE
3
3
× 3.3 × 10
×
I
× 3.3 × 10
2
LOAD
× C
(
V
f
SW
DD
TOTAL
+ P
= 0.003 × (15 A)
C
+
SW
upperFET
2
I
−9
× I
× 1 mΩ = 56.25 mW
2
BIAS
−9
+ P
× 5.5 + 0.002))
× 1.4 mΩ = 3.15 mW
× 5.12 + 0.002))
LOAD
DCR
) ]
V
× V
+ P
DR
IN
DR
2
+
× 2
= 675 mW
+ P
I
BIAS
COUT
) ]
+ P
CIN