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ST2044
CURRENT LIMITED POWER DISTRIBUTION SWITCHES
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80m HIGH-SIDE MOSFET SWITCH 500mA CONTINUOUS CURRENT PER CHANNEL INDEPENDENT THERMAL AND SHORT-CIRCUIT PROTECTION WITH OVERCURRENT LOGIC OUTPUT OPERATING RANGE FROM 2.7V TO 5.5V CMOS- AND TTL-COMPATIBLE ENABLE INPUTS 2.5ms TYPICAL RISE TIME UNDERVOLTAGE LOCKOUT 20A MAXIMUM STANDBY SUPPLY CURRENT AMBIENT TEMPERATURE RANGE, 0C TO 85C ESD PROTECTION
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DESCRIPTION The ST2044 power distribution switches is intended for application where heavy capacitive loads and short circuits are likely to be encountered. These devices incorporate 80m N-channel MOSFET high-side power switches for power-distribution systems that require multiple powers switches in a single package. Each switch is controlled by an independent logic enable input. Gate drive is provided by an internal charge pump designed to control the power-switch rise times and fall times to minimize current surges during ORDERING CODES
Type ST2044BD ST2044BDR Temperature Range -40 to 85 C -40 to 85 C Package
switching. The charge pump requires no external components and allows operation from supplies as low as 2.7 V. When the output load exceeds the current-limit threshold or a short is present, these devices limit the output current to a safe level by switching into a constant-current mode, pulling the overcurrent (OCx) logic output low. When continuous heavy overloads and short circuits increase the power dissipation in the switch, causing the junction temperature to rise, a thermal protection circuit shuts off the switch to prevent damage. Recovery from a thermal shutdown is automatic once the device has cooled sufficiently. Internal circuitry ensures the switch remains off until valid input voltage is present. These power-distribution switches are designed to current limit at 0.9 A.
Comments 50parts per tube / 40tube per box 2500 parts per reel
SO-16 (Tube) SO-16 (Tape & Reel)
July 2003
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PIN CONFIGURATION PIN DESCRIPTION
Pln N 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 Symbol GNDA IN1 EN1 EN2 GNDB IN2 EN3 EN4 OC4 OUT4 OUT3 OC3 OC2 OUT2 OUT1 OC1 Name And Function Ground Input Voltage Enable Input. Logic Low Turns On Power Switch IN-OUT1 Enable Input. Logic Low Turns On Power Switch IN-OUT2 Ground Input Voltage Enable Input. Logic Low Turns On Power Switch IN-OUT3 Enable Input. Logic Low Turns On Power Switch IN-OUT4 Overcurrent. Logic Output Active Low IN-OUT4 Power Switch Output Power Switch Output Overcurrent. Logic Output Active Low IN-OUT3 Overcurrent. Logic Output Active Low IN-OUT2 Power Switch Output Power Switch Output Overcurrent. Logic Output Active Low IN-OUT1
ABSOLUTE MAXIMUM RATINGS
Symbol VI VO VIENX IO ESD TJ Parameter Input Voltage Range (Note 1) Output Voltage Range (Note 1) Input Voltage Range Continuous Output Current Electrostatic Discharge Operating Junction Temperature Value -0.3 to 6 -0.3 to (VI +0.3) -0.3 to 6 Internally Limited 2 -40 to 125 kV C Unit V V V
Absolute Maximum Ratings are those values beyond which damage to the device may occur. Functional operation under these condition is not implied. Note1: All voltage are referred to GND
RECOMMENDED OPERATING CONDITION
Symbol VI VO IO Parameter Input Voltage Range (Note 1) Output Voltage Range (Note 1) Continuous Output Current (Per Switch) Min. 2.7 0 0 Typ. Max. 5.5 5.5 500 Unit V V mA
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BLOCK DIAGRAM
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POWER SWITCH ELECTRICAL CHARACTERISTICS (VI = 5V, IO = rated current, VIEN = 0V, TJ = 25C, unless otherwise specified.) (See Note 1)
Symbol Parameter VI =5V VI =5V VI =5V Test Conditions IO = 0.5A IO = 0.5A IO = 0.5A TJ=85C TJ=125C TJ=85C TJ=125C CL=1F CL=1F CL=1F CL=1F Min. Typ. 80 90 100 90 110 120 2.5 3 0.3 0.2 ms Max. 100 120 135 125 145 160 ms Unit m RDS(ON) Static Drain-Source ON-State Resistance
VI =3.3V IO = 0.5A VI =3.3V IO = 0.5A VI =3.3V IO = 0.5A tr tf Output Rise Time Output Fall Time VI =5.5V RL=10 VI =2.7V RL=10 VI =5.5V RL=10 VI =2.7V RL=10
ENABLE INPUT ENx CHARACTERISTICS (VI = 5V, IO = rated current, VIEN = 0V, TJ = 25C, unless otherwise specified.) (See Note 1)
Symbol VIH VIl II ton toff Parameter High level Input Voltage Low level Input Voltage Input Current Turn-on Time Turn-off Time Test Conditions VI =2.7V to 5.5V VI =4.5V to 5.5V VI =2.7V to 5.5V VIENX =0V or VI RL=10 CL=100F RL=10 CL=100F -0.5 Min. 2 0.8 0.4 0.5 20 40 A ms ms Typ. Max. Unit V V
CURRENT LIMIT CHARACTERISTICS (VI = 5V, IO = rated current, VIEN = 0V, TJ = 25C, unless otherwise specified.) (See Note 1)
Symbol IOS Parameter Test Conditions Min. 0.7 Typ. 1 Max. 1.3 Unit A Short Circuit Output Current VI =5V, OUT connected to GND, device enabled into short circuit
SUPPLY CURRENT CHARACTERISTICS (VI = 5V, IO = rated current, VIEN = 0V, TJ = 25C, unless otherwise specified.) (See Note 1)
Symbol ISOL ISOH IL Parameter Current Low Level Output Current Low High Output Output Leakage Current Test Conditions VIENX = VI, No Load, VIENX = VI, No Load, VIENX = 0, No Load, VIENX = 0, No Load, TJ=-40 to 125C VIENX = VI, Output Connected to GND, TJ=-40 to 125C TJ=-40 to 125C 140 Min. Typ. 0.05 Max. 2 20 180 200 20 A A Unit A
UNDERVOLTAGE CHARACTERISTICS (VI = 5V, IO = rated current, VIEN = 0V, TJ = 25C, unless otherwise specified.) (See Note 1)
Symbol VIL VHYS 4/8 Parameter Low Level Input Voltage Hysteresis Test Conditions Min. 2 100 Typ. Max. 2.5 Unit V mV
ST2044
OVERCURRENT (OC) CARACTERISTICS (VI = 5V, IO = rated current, VIEN = 0V, TJ = 25C, unless otherwise specified.) (See Note 1)
Symbol ISINK VO IOFF Parameter Sink Current Output Low Voltage OFF-State Current VO =5V IO =5mA VO =5V VO =3.3V Test Conditions Min. 10 0.5 1 Typ. Max. Unit mA V A
Note 1: Pulse testing techniques maintain junction temperature close to ambient temperature: thermal effect must be takes into account separately. Note 2: Specified by design, not production tested.
TEST CIRCUIT
WAVEFORM: PROPAGATION DELAYS (f=1MHz; 50% duty cycle)
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SO-16 MECHANICAL DATA
DIM. A a1 a2 b b1 C c1 D E e e3 F G L M S 8 3.8 4.6 0.5 9.8 5.8 1.27 8.89 4.0 5.3 1.27 0.62 (max.) 0.149 0.181 0.019 10 6.2 0.35 0.19 0.5 45 (typ.) 0.385 0.228 0.050 0.350 0.157 0.208 0.050 0.024 0.393 0.244 0.1 mm. MIN. TYP MAX. 1.75 0.2 1.65 0.46 0.25 0.013 0.007 0.019 0.004 MIN. inch TYP. MAX. 0.068 0.008 0.064 0.018 0.010
PO13H
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ST2044
Tape & Reel SO-16 MECHANICAL DATA
mm. DIM. MIN. A C D N T Ao Bo Ko Po P 6.45 10.3 2.1 3.9 7.9 12.8 20.2 60 22.4 6.65 10.5 2.3 4.1 8.1 0.254 0.406 0.082 0.153 0.311 TYP MAX. 330 13.2 0.504 0.795 2.362 0.882 0.262 0.414 0.090 0.161 0.319 MIN. TYP. MAX. 12.992 0.519 inch
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Information furnished is believed to be accurate and reliable. However, STMicroelectronics assumes no responsibility for the consequences of use of such information nor for any infringement of patents or other rights of third parties which may result from its use. No license is granted by implication or otherwise under any patent or patent rights of STMicroelectronics. Specifications mentioned in this publication are subject to change without notice. This publication supersedes and replaces all information previously supplied. STMicroelectronics products are not authorized for use as critical components in life support devices or systems without express written approval of STMicroelectronics. (c) The ST logo is a registered trademark of STMicroelectronics (c) 2003 STMicroelectronics - Printed in Italy - All Rights Reserved STMicroelectronics GROUP OF COMPANIES Australia - Brazil - Canada - China - Finland - France - Germany - Hong Kong - India - Israel - Italy - Japan - Malaysia - Malta - Morocco Singapore - Spain - Sweden - Switzerland - United Kingdom - United States. (c) http://www.st.com
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