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Part: IRU1160
Category:
Description:
Company: International Rectifier Corp.
Datasheet: Download IRU1160 datasheet File size : 278 kB
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Data Sheet No. PD94130
IRU1160
6A ULTRA LOW DROPOUT POSITIVE ADJUSTABLE REGULATOR DESCRIPTION
The IRU1160 is a 6A regulator with extremely low dropout voltage using a proprietary bipolar process that achieves comparable equivalent on resistance to that of discrete MOSFETs. This product is specifically designed to provide well regulated supply for applications requiring 2.8V or lower voltages from 3.3V ATX power supplies where high efficiency of a switcher can be achieved without the cost and complexity associated with switching regulators.
FEATURES
0.62V Dropout at 6A Fast Transient Response 1% Voltage Reference Initial Accuracy Built-In Thermal Shutdown
APPLICATIONS
VGA Card Applications On-Board Low Voltage Regulator Supply such as 3.3V to 2.8V
TYPICAL APPLICATION
3.3V
C1 100uF Vin Vctrl
5 4 3 2 1
R1 100 1% R2 124 1% C2 100uF
IRU1160
Vout Adj Vsense
2.7V
C3 100uF
5V
Figure 1 - Typical application of IRU1160 in a 3.3V to 2.8V
PACKAGE ORDER INFORMATION
Tj (°C) 0 To 125 5-PIN PLASTIC TO-263 (M) IRU1160CM 5-PIN PLASTIC Ultra Thin-Pak (P) IRU1160CP
Rev. 1.1 06/29/01
1
IRU1160
ABSOLUTE MAXIMUM RATINGS
Input Voltage (Vin) .... 7V Control Input Voltage (Vctrl ...... 14V Power Dissipation ..... Internally Limited Storage Temperature Range ..... -65°C To 150°C Operating Junction Temperature Range ............ 0°C To 150°C
PACKAGE INFORMATION
5-PIN PLASTIC TO-263 (M)
FRONT VIEW 5 4 3 2 1
5-PIN PLASTIC ULTRA THIN-PAK (P)
FRONT VIEW 5 4 3 2 1
Vin Vctrl Vout Adj Vsense
Vin Vctrl Vout Adj Vsense
JA=35°C/W for 0.5" square pad
JA=35°C/W for 0.5" square pad
ELECTRICAL SPECIFICATIONS
Unless otherwise specified, these specifications apply over Cin=µF, Cout=10µF, and Tj=0 to 125!C. Typical values refer to Tj=25!C. Vout=Vsense. PARAMETER Reference Voltage SYM Vref TEST CONDITION Vctrl=2.75V, Vin=2V, Io=10mA, Tj=25!C, Vadj=0V
Vctrl=2.7 to 12V, Vin=2.05V to 5.5V,
MIN 1.225 1.225
TYP 1.250 1.250
MAX 1.275 1.275
UNITS V
Io=10mA to 6A, Vadj=0V Line Regulation Load Regulation (Note 1) Dropout Voltage (Note 2) (Vctrl - Vout)
Vctrl=2.5V to 7V, Vin=1.75V to 5.5V,
Dropout Voltage (Note 2) (Vin- Vout)
Current Limit Minimum Load Current (Note 3) Thermal Regulation Ripple Rejection
Io=10mA , Vadj=0V Vctrl=2.75V, Vin=2.1V, Io=10mA to 6A, Vadj=0V Vadj=0V for all conditions below: Vin=2.05V, Io=1.5A Vin=2.05V, Io=5A Vin=2.05V, Io=6A Vadj=0V for all conditions below: Vctrl=2.75V, Io=1.5A Vctrl=2.75V, Io=5A Vctrl=2.75V, Io=6A Vctrl=2.75V, Vin=2.05V, dVo=100mV, Vadj=0V Vctrl=5V, Vin=3.3V, Vadj=0V 30ms Pulse Vctrl=5V, Vin=5V, Io=5A,Vadj=0V, Tj=25!C, Vripple=1Vpp at 120Hz
3 6 1.00 1.10 1.20 0.15 0.40 0.55 6.2 5 0.01 60 70 10 0.02
mV mV V
1.30 0.20 0.52 0.62 V
A mA %/W dB
2
Rev. 1.1 06/29/01
IRU1160
PARAMETER Control Pin Current SYM TEST CONDITION Vadj=0V for all below conditions: Vctrl=2.75V, Vin=2.05V, Io=1.5A Vctrl=2.75V, Vin=2.05V, Io=5A Vctrl=2.75V, Vin=2.05V, Io=6A Vctrl=2.75V, Vin=2.05V, Vadj=0V MIN TYP 15 50 60 50 MAX UNITS mA
Adjust Pin Current
Iadj
120
µA
Note 1: Low duty cycle pulse testing with Kelvin connections are required in order to maintain accurate data. Note 2: Dropout voltage is defined as the minimum differential between Vin and Vout required to maintain regulation at Vout. It is measured when the output voltage drops 1% below its nominal value.
Note 3: Minimum load current is defined as the minimum current required at the output in order for the output voltage to maintain regulation. Typically the resistor dividers are selected such that it automatically maintains this current.
PIN DESCRIPTIONS
PIN # PIN SYMBOL Vsense 1 2 3 4 Adj Vout Vctrl PIN DESCRIPTION This pin is the positive side of the reference which allows remote load sensing to achieve excellent load regulation. A resistor divider from this pin to the Vout pin and ground sets the output voltage. The output of the regulator. A minimum of 10µF capacitor must be connected from this pin to ground to insure stability. This pin is the supply pin for the internal control circuitry as well as the base drive for the pass transistor. This pin must always be higher than the Vout pin in order for the device to regulate. (See specifications) The input pin of the regulator. Typically a large storage capacitor is connected from this pin to ground to insure that the input voltage does not sag below the minimum dropout voltage during the load transient response. This pin must always be higher than Vout in order for the device to regulate. (See specifications)
5
Vin
Rev. 1.1 06/29/01
3
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