IR3865MTRPBF International Rectifier, IR3865MTRPBF Datasheet - Page 4

• Manufacturer Part Number: IR3865MTRPBF
• Description: IC BUCK SYNC ADJ 10A PQFN
• Manufacturer: International Rectifier
• Series: SupIRBuck™r
• Type: Step-Down (Buck), PWMr

Specifications of IR3865MTRPBF

• Internal Switch(s): Yes
• Synchronous Rectifier: Yes
• Number Of Outputs: 1
• Voltage - Output: 0.5 V ~ 12 V
• Current - Output: 10A
• Frequency - Switching: Up to 750kHz
• Voltage - Input: 3 V ~ 21 V
• Operating Temperature: -40°C ~ 125°C
• Mounting Type: *
• Package / Case: *
• Primary Input Voltage: 21V
• No. Of Outputs: 1
• Output Voltage: 12V
• Output Current: 10A
• No. Of Pins: 17
• Operating Temperature Range: -40°C To +125°C
• Msl: MSL 3 - 168 Hours
• Rohs Compliant: Yes
• Leaded Process Compatible: Yes
• Part Status: Preferred
• Package: PQFN / 4 x 5
• Circuit: Single Output
• Iout (a): 10
• Switch Freq (khz): 0 - 750
• Input Range (v): 3.0 - 21
• Output Range (v): 0.5 - 12
• Ocp Otp Uvlo Pre-bias Soft Start And: Constant On-Time + PGOOD + EN + Temp Comp OCP
• Digital Home Media: Yes
• Mobile Computing: Yes
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Pin Description
NAME
FCCM
ISET
PGOOD
GND
FB
SS
NC
3VCBP
NC
VCC
PGND
PHASE
VIN
BOOT
FF
EN
2/16/2011 Rev2.3
NUMBER
4,17
10
11
12
13
14
15
16
1
2
3
5
6
7
8
9
I/O
LEVEL
3.3V
5V
Reference
3.3V
3.3V
3.3V
3.3V
-
5V
Reference
VIN
VIN
VIN +VCC
VIN
5V
DESCRIPTION
Forced Continuous Conduction Mode (CCM). Ground this pin
to enable diode emulation mode or discontinuous conduction
mode (DCM). Pull this pin to 3.3V to operate in CCM under all
load conditions.
Connecting resistor to PHASE pin sets over current trip point.
Power good open drain output – pull up with a resistor to 3.3V
Bias return and signal reference.
Inverting input to PWM comparator, OVP / PGOOD sense.
Soft start/shutdown. This pin provides user programmable soft-
start function. Connect an external capacitor from this pin to
GND to set the startup time of the output voltage. The converter
can be shutdown by pulling this pin below 0.3V.
-
For internal LDO. Bypass with a 1.0µF capacitor to AGND. A
resistor in series with the bypass capacitor may be required in
single-ground plane designs. Refer to Layout Recommendation
for details.
-
VCC input. Gate drive supply. A minimum of 1.0µF ceramic
capacitor is required.
Power return.
Phase node (or switching node) of MOSFET half bridge.
Input voltage for the system.
Bootstrapped gate drive supply – connect a capacitor to
PHASE.
Input voltage feed forward – sets on-time with a resistor to VIN.
Enable pin to turn on and off the device. Use two external
resistors to set the turn on threshold (see Electrical
Specifications) for input voltage monitoring.
IR3865MBF
4