IRU3037CF International Rectifier, IRU3037CF Datasheet

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IRU3037CF

Manufacturer Part Number
IRU3037CF
Description
IC CNTRLR PWM SYNC 200KHZ 8TSSOP
Manufacturer
International Rectifier
Datasheet

Specifications of IRU3037CF

Pwm Type
Voltage Mode
Number Of Outputs
1
Frequency - Max
220kHz
Duty Cycle
95%
Voltage - Supply
5 V ~ 12 V
Buck
Yes
Boost
No
Flyback
No
Inverting
No
Doubler
No
Divider
No
Cuk
No
Isolated
No
Operating Temperature
0°C ~ 70°C
Package / Case
8-TSSOP
Frequency-max
220kHz
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
Other names
*IRU3037CF

Available stocks

Company
Part Number
Manufacturer
Quantity
Price
Part Number:
IRU3037CFTRPBF
Manufacturer:
IR
Quantity:
3 000
Part Number:
IRU3037CFTRPBF
Manufacturer:
IR
Quantity:
20 000
FEATURES
APPLICATIONS
TYPICAL APPLICATION
PACKAGE ORDER INFORMATION
2200pF
Synchronous Controller in 8-Pin Package
Operating with single 5V or 12V supply voltage
Internal 200KHz Oscillator
(400KHz for IRU3037A)
Soft-Start Function
Fixed Frequency Voltage Mode
500mA Peak Output Drive Capability
Protects the output when control FET is shorted
SOIC 8-Lead also available LEAD-FREE
DDR memory source sink Vtt application
Low cost on-board DC to DC such as 5V to 3.3V,
2.5V or 1.8V
Graphic Card
Hard Disk Drive
0.1uF
C8
C9
24k
R4
T
0 To 70
0 To 70
0 To 70
0 To 70
1uF
A
C3
(°C)
SS/SD
Comp
Vcc
IRU3037CF
IRU3037CS
IRU3037ACF IRU3037ACFPbF
IRU3037ACS IRU3037ACSPbF
IRU3037
DEVICE
Gnd
U1
Vc
Figure 1 - Typical application of IRU3037 or IRU3037A.
HDrv
LDrv
Fb
LEADFREE DEVICE PACKAGE
IRU3037CFPbF
8-PIN SYNCHRONOUS PWM CONTROLLER
IRU3037CSPbF
12V
C4
1uF
R5
1.24K, 1%
www.irf.com
Q1
1/2 of IRF7313
Q2
1/2 of IRF7313
DESCRIPTION
The IRU3037 controller IC is designed to provide a low
cost synchronous Buck regulator for on-board DC to DC
converter applications. With the migration of today’s ASIC
products requiring low supply voltages such as 1.8V and
lower, together with currents in excess of 3A, traditional
linear regulators are simply too lossy to be used when
input supply is 5V or even in some cases with 3.3V
input supply. The IRU3037 together with dual N-channel
MOSFETs such as IRF7313, provide a low cost solution
for such applications. This device features an internal
200KHz oscillator (400KHz for "A" version), under-volt-
age lockout for both Vcc and Vc supplies, an external
programmable soft-start function as well as output un-
der-voltage detection that latches off the device when an
output short is detected.
IRU3037/IRU3037A & (PbF)
249, 1%
8-Pin Plastic TSSOP (F)
8-Pin Plastic SOIC NB (S)
8-Pin Plastic TSSOP (F)
8-Pin Plastic SOIC NB (S)
R3
D05022P-562, 5.6uH, 5.3A
C2
10TPB100M,
100uF, 55m Ω
L2
Data Sheet No. PD94173 revD
1uH
L1
FREQUENCY
200KHz
200KHz
400KHz
400KHz
C1
47uF
C7
2x 6TPC150M,
150uF, 40m Ω
5V
1.5V/5A
1

Related parts for IRU3037CF

IRU3037CF Summary of contents

Page 1

... Q1 1/2 of IRF7313 D05022P-562, 5.6uH, 5.3A Q2 1/2 of IRF7313 R3 249 1.24K, 1% LEADFREE DEVICE PACKAGE IRU3037CFPbF 8-Pin Plastic TSSOP (F) IRU3037CSPbF 8-Pin Plastic SOIC NB (S) 8-Pin Plastic TSSOP (F) 8-Pin Plastic SOIC NB (S) www.irf.com Data Sheet No. PD94173 revD 5V L1 1uH C1 47uF L2 1 ...

Page 2

IRU3037/IRU3037A & (PbF) ABSOLUTE MAXIMUM RATINGS Vcc Supply Voltage .................................................. Vc Supply Voltage ...................................................... 30V (not rated for inductive load) Storage Temperature Range ...................................... -65°C To 150°C Operating Junction Temperature Range ..................... CAUTION: Stresses above those listed in "Absolute Maximum ...

Page 3

PARAMETER SYM Error Amp Fb Voltage Input Bias Current I Fb Voltage Input Bias Current I Transconductance g Oscillator Frequency Freq Ramp-Amplitude Voltage V Output Drivers Rise Time Fall Time Dead Band Time T Max Duty Cycle T Min Duty ...

Page 4

IRU3037/IRU3037A & (PbF) BLOCK DIAGRAM 3V 20uA SS/SD 64uA Max 8 POR 1.25V Error Amp 25K 25K Fb 1 Comp 7 Figure 2 - Simplified block diagram of the IRU3037. THEORY OF OPERATION Introduction The IRU3037 is a fixed frequency, ...

Page 5

APPLICATION INFORMATION Design Example: The following example is a typical application for IRU3037, the schematic is Figure 18 on page 14 3.3V OUT OUT ∆V = 100mV OUT f = 200KHz ...

Page 6

IRU3037/IRU3037A & (PbF) Assuming the following: ∆V = 1%(V ), Efficiency(η ∆ × ∆t = 3.3µ × 2.93A IN IN η × ...

Page 7

For this design, IRF7301 is a good choice. The device provides low on-resistance in a compact SOIC 8-Pin package. The IRF7301 has the following data 20V DSS 0.05Ω DS(ON) The total conduction ...

Page 8

IRU3037/IRU3037A & (PbF) Note that this method requires that the output capacitor should have enough ESR to satisfy stability requirements. In general the output capacitor’s ESR generates a zero typically at 5KHz to 50KHz which is essential for an acceptable ...

Page 9

For a general solution for unconditionally stability for any type of output capacitors wide range of ESR values we should implement local feedback with a compensa- tion network. The typically used compensation network for voltage-mode controller is shown ...

Page 10

IRU3037/IRU3037A & (PbF) 6) Place second pole at the ESR zero ESR 2π × C × Check if R > too small, ...

Page 11

TYPICAL PERFORMANCE CHARACTERISTICS IRU3037/IRU3037A & (PbF 3037A V cc vs. Icc @ 470P F , 1150P F and ...

Page 12

IRU3037/IRU3037A & (PbF) TYPICAL PERFORMANCE CHARACTERISTICS lta Min ...

Page 13

TYPICAL PERFORMANCE CHARACTERISTICS lta Min ...

Page 14

IRU3037/IRU3037A & (PbF) TYPICAL APPLICATION Single Supply 5V Input D3 1N4148 C3 C4 1uF 1uF Vcc Vc HDrv U1 SS/SD C8 IRU3037 0.1uF LDrv Comp C9 Fb 680pF Gnd R4 105K Figure 17 - Typical application of IRU3037 in an ...

Page 15

TYPICAL APPLICATION Dual Supply, 5V Bus and 12V Bias Input 5V 12V C4 1uF Vc Vcc HDrv U1 SS/SD C7 IRU3037 0.1uF LDrv Comp C8 Fb 2200pF Gnd R2 14K C10 1uF Vc Vcc HDrv U2 SS/SD C13 IRU3037 LDrv ...

Page 16

IRU3037/IRU3037A & (PbF) TYPICAL APPLICATION 1.8V to 7.5V / 0.5A Boost Converter Vpwr (1.5V Min) Vc/Vcc R1 20K Q2 R2 2N2222 10K 100pF Q1 2N2222 R3 20K Figure 19 - Typical application of IRU3037 as a boost converter ...

Page 17

DEMO-BOARD APPLICATION 5V or 12V to 3.3V @ 10A 1uH 5V or 12V D4 C1 LL4148 33uF 16V Gnd Vcc C8 1uF SS/SD U1 IRU3037 C5 0.1uF Comp C4 2200pF Gnd R3 20K Figure 20 - Demo-board ...

Page 18

IRU3037/IRU3037A & (PbF) DEMO-BOARD WAVEFORMS V =5.0V, V =3.3V IN OUT 100 Output Current (A) Figure 21 - Efficiency for IRU3037 Evaluation Board. IRU3037 OUT I ...

Page 19

TSSOP Package 1.0 DIA PIN NUMBER SYMBOL DESIG MIN 0. ...

Page 20

IRU3037/IRU3037A & (PbF) 8-Pin Surface Mount, Narrow Body PIN NO NOTE: ALL MEASUREMENTS ARE IN MILLIMETERS. 20 (S) SOIC Package DETAIL-A 0.38 ± 0.015 8-PIN SYMBOL MIN ...

Page 21

PACKAGE SHIPMENT METHOD PKG PACKAGE DESIG DESCRIPTION F TSSOP Plastic S SOIC, Narrow Body 1 1 Feed Direction Figure A LEADFREE PART MARKING INFORMATION Part number Date code Pin 1 Identifier ? P IR WORLD HEADQUARTERS: 233 Kansas St., El ...

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