IR3871MTR1PBF International Rectifier, IR3871MTR1PBF Datasheet - Page 8

• Manufacturer Part Number: IR3871MTR1PBF
• Description: IC REG SYNC BUCK 8A 17-QFN
• Manufacturer: International Rectifier
• Series: SupIRBuck™r
• Type: Step-Down (Buck)r

Specifications of IR3871MTR1PBF

• Internal Switch(s): Yes
• Synchronous Rectifier: Yes
• Number Of Outputs: 1
• Voltage - Output: 0.5 ~ 5 V
• Current - Output: 8A
• Frequency - Switching: Adj to 1MHz
• Voltage - Input: 3 ~ 26 V
• Operating Temperature: 0°C ~ 125°C
• Mounting Type: Surface Mount
• Package / Case: 17-PowerVQFN
• Part Status: Active
• Package: PQFN / 5 x 6
• Circuit: Single Output
• Iout (a): 8
• Switch Freq (khz): 0 - 1000
• Input Range (v): 3.0 - 26
• Output Range (v): 0.5 - 12
• Ocp Otp Uvlo Pre-bias Soft Start And: Constant On-Time + OVP no OTP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Power - Output: -
• Other names: IR3871MTR1PBFTR

SW1
EN / FCCM
TYPICAL APPLICATION CIRCUIT
TP4
EN
Demoboard Schematic: VOUT = 1.05V, Fs = 300kHz
Demoboard Bill of Materials
Item Quantity
VCC
10
11
12
13
14
15
16
1
2
3
4
5
6
7
8
9
R2
10K
TP19
FB
R9
0
R10
open
TP11
PGOOD
TP3
FCCM
1
3
1
1
1
1
2
1
2
1
1
1
1
1
1
1
+3.3V
VSW
+3.3V
R5
10K
C4
C1, C21, C25 1uF
C2
C3
C9
C10
C12, C20
L1
R2, R5
R9
R3
R4
R7
R8
SW1
U1
R1
open
TP13
SS
TP14
+3.3V
TP26
AGND
TP16
VCC
TP17
PGND
Reference
R4
10.5K
Figure 7. Typical Application Circuit for V
C5
open
+3.3V
VCC
C23
open
EN
FCCM
ISET
PGOOD
FB
SS
C20
0.1uF
0.22uF CAP,CER,0.22uF,50V,10%,X7R,0603
22uF
68uF
330uF
47uF
0.1uF
1.5uH
10K
0
200K
10.5K
2.8K
2.55K
SPST
IR3871 5mm x 6mm QFN
+Vdd2s
-Vdd2s
Value
1
2
3
4
5
6
7
NC
ISET
PGOOD
GND1
FB
SS
NC1
C21
1uF
CAP,CER,1.0uF,25V,X7R,0603
CAP,22uF,25V,CERAMIC,X5R,1210
CAP,68uF,25V,ELECT,FK,SMD
PC-CON, 330uF, 2V, 4.5mOhm, 20%
CAP,CER,47uF,6.3V,X5R,0805
CAP,CER,0.1uF,50V,10%,X7R,0603
INDUCTOR, 1.5uH, 11A, 6.7mOhm,SMD
RES,10.0K,OHM,1/10W,1%,0603,SMD
RES,0.0,OHM,1/10W,1%,0603,SMD
RES,200K,OHM,1/10W,1%,0603,SMD
RES,10.5K,OHM,1/10W,1%,0603,SMD
RES,2.8K,OHM,1/10W,1%,0603,SMD
RES,2.55K,OHM,1/10W,1%,0603,SMD
SWITCH, DIP, SPST, SMT
IR3871
R3
200K
C25
1uF
PHASE
U1
IR3871
+Vin1s
C22
open
C4
0.22uF
12
-Vout1s
+Vdd1s
-Vdd1s
Description
TP20
+Vin1s
2
5
VIN
VSW
R6
open
TP12
VSWS
TP22
+Vsws
TP21
-Vsws
TP15
-Vout1s
TP25
-Vin1s
C14
open
L1
1.5uH
C13
open
OUT
C1
1uF
VOUT
TP9
+Vout1s
R7
2.80K
R8
2.55K
R11
open
R12
open
= 1.05V, Fs = 300kHz
C2
22uF
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Panasonic
Rubycon
TDK
TDK
CYNTEC
Vishay/Dale
Vishay/Dale
Vishay/Dale
Vishay/Dale
Vishay/Dale
Vishay/Dale
C&K Components
IR
open
C24
+
C3
68uF
Manufacturer
C6
open
C15
open
R13
open
+Vins
-Vins
C7
open
C16
open
R14
open
TP1
VINS
TP6
PGNDS
C8
open
C17
open
IR3871MPBF
TP2
VIN
TP5
PGND
C9
330uF
C18
open
ECJ-4YB1E226M
EEV-FK1E680P
2SWZ330M R05
C2012X5R0J476M
C1608X7R1H104K
PCMB065T-1R5MS
CRCW060310K0FKEA
CRCW06030000Z0EAHP
CRCW0603200KFKEA
CRCW060310K5FKEA
CRCW06032K80FKEA
CRCW06032K55FKEA
SD02H0SK
IR3871MBF
C10
47uF
C19
open
Part-Number
C26
open
C11
open
C27
open
C12
0.1uF
2
TP23
+Vsws
TP24
+Vsws
TP18
VOLTAGE SENSE
5
TP8
VOUTS
8
TP7
VOUT
TP10
PGND