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ISL6121のメーカーはIntersil Corporationです、この部品の機能は「Single Supply Integrated Current Limiting Controller」です。 |
部品番号 | ISL6121 |
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部品説明 | Single Supply Integrated Current Limiting Controller | ||
メーカ | Intersil Corporation | ||
ロゴ | |||
このページの下部にプレビューとISL6121ダウンロード(pdfファイル)リンクがあります。 Total 11 pages
TM
Data Sheet
ISL6121
May 2001
File Number 9004.1
Single Supply Integrated Current Limiting
Controller
The ISL6121 is a single supply Overcurrent (OC) fault
protection IC for 2.5V to 5V applications where 2A current
limiting is desired. This device features internal current
monitoring and limiting along with a 50mΩ integrated power
switch and a current limited time out to latch-off feature for
system protection. The time to latch-off is independent of
device temperature, and magnitude of OC.
Each ISL6121 incorporates in a 8 lead SOIC package a
50mΩ N-channel MOSFET power switch for power control.
The switch is driven by a constant current source giving a
controlled ramp up of the output voltage. This provides a soft
start turn-on eliminating bus voltage drooping caused by in-
rush current while charging heavy load capacitances.
(Enable high (ISL6121H) and enable low (ISL6121L) options
are) available with a fault reporting output compatible with 3V
and 5V logic level signals allowing for external control and
monitoring.
The Under Voltage (UVLO) lockout feature prevents turn-on
of the output unless the correct ENABLE signal and VIN >
2.5V are both present. During initial turn-on the ISL6121
design prevents a fault from being presented by blanking the
fault signal, unlike other vendor devices needing additional
external circuitry to accomplish this. Rising and falling
output is a current-limited voltage ramp so that both the
inrush current and voltage slew rate are limited,
independent of load. This reduces supply droop due to
surge and eliminates the need for external EMI filters.
During operation once an OC condition is detected the
output is current limited to 2A to allow for a transient
condition to pass. If still in current limit after the current limit
period has elapsed the output is latched off and the fault is
reported by pulling the FAULT low. The FAULT signal is
latched low until reset by the enable signal being deasserted
at which time the FAULT signal will clear.
See Figure 1 for typical application configuration.
Ordering Information
PART
NUMBER
ISL6121HIB
ISL6121HIB-T
TEMP. RANGE
(oC) PACKAGE PKG. NO.
-40 to 85 8 Ld SOIC M8.15
-40 to 85 8 Ld SOIC Tape and Reel
ISL6121LIB
ISL6121LIB-T
ISL6121HEVAL1
-40 to 85 8 Ld SOIC M8.15
-40 to 85 8 Ld SOIC Tape and Reel
Evaluation Platform
Features
• 0.05Ω Integrated Power N-channel MOSFET Switch
• Accurate Current Sensing and Limiting
• 12ms Timed Fault Latch-Off, No thermal Dependency
• 2.5V to 5.5V Operating Range
• Under Voltage Lockout
• Disabled Output Internally Pulled Low
• Controlled Turn On/Off Ramp Times
• Fault Output Signal
• Logic Level Enable High Inputs (ISL6121H) or Enable Low
Inputs (ISL6121L)
• Logic Level Compatible Enable Input and Fault Output
Applications
• Fibre Channel
• Industrial Power Control
• Hot Plug
1 GND
2 VIN
3 VIN
4 EN
OUT 8
OUT 7
OUT 6
FAULT 5
RL
CL
FIGURE 1. ISL6121 TYPICAL APPLICATION
1 CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
1-888-INTERSIL or 321-724-7143 | Intersil and Design is a trademark of Intersil Americas Inc.
Copyright © Intersil Americas Inc. 2001, All Rights Reserved
1 Page ISL6121
Absolute Maximum Ratings
Supply Voltage (V+ to V-). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6.0V
EN, FAULT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .-0.3V to 6V
OUT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . GND-0.3V to VIN +0.3V
DC Input Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . VSUPPLY
Output Current . . . . . . . . . . . . . . . . . . . . . . .Short Circuit Protected
ESD Rating
Human Body Model (Per MIL-STD-883 Method 3015.7) . . . . 3KV
Thermal Information
Thermal Resistance (Typical, Note 1)
θJA (oC/W)
8 Lead SOIC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
116
Maximum Junction Temperature (Plastic Package) . . . . . . . . 150oC
Maximum Storage Temperature Range. . . . . . . . . . -65oC to 150oC
Maximum Lead Temperature (Soldering 10s) . . . . . . . . . . . . . 300oC
Operating Conditions
Temperature Range . . . . . . . . . . . . . . . . . . . . . . . . . . -40oC to 85oC
Supply Voltage Range (Typical) . . . . . . . . . . . . . . . . . . 2.5V to 5.5V
CAUTION: Stresses above those listed in “Absolute Maximum Ratings” may cause permanent damage to the device. This is a stress only rating and operation of the
device at these or any other conditions above those indicated in the operational sections of this specification is not implied.
NOTE:
1. θJA is measured with the component mounted on a high effective thermal conductivity test board in free air. See Tech Brief TB379 for details.
Electrical Specifications VSUPPLY = 5V, Unless Otherwise Specified.
PARAMETER
SYMBOL
TEST CONDITIONS
POWER SWITCH
ISL6121 On Resistance at 2.7V
ISL6121 On Resistance at 3.3V
ISL6121 On Resistance at 5.0V
Disabled Output Voltage
Output Voltage Rising Rate
Slow VOUT Turn-off Rate
Fast VOUT Turn-off Rate
CURRENT CONTROL
rDS(ON)_27
rDS(ON)_33
rDS(ON)_50
VIN = 2.7V, IOUT = 0.8A,TA = TJ = 25oC
TA = TJ = 85oC
VIN = 3.3V, IOUT = 0.8A,TA = TJ = 25oC
TA = TJ = 85oC
VIN = 5V, IOUT = 0.8A,T A = TJ = 25oC
TA = TJ = 85oC
VOUT_DIS VIN = 5V, Switch Disabled, 50µA Load
t_vout_rt RL = 10Ω, CL = 0.1µF, 10%-90%
t_svout_offt RL = 10Ω, CL = 0.1µF, 90%-10%
t_fvout_offt RL = 1Ω, CL = 0.1µF, 90%-10%
Current Limit, VIN = 5V
Ilim VOUT = 3.3V
OC Regulation Settling Time
Severe OC Regulation Settling Time
Over Current Latch-off Time
I/O PARAMETERS
tsettIlim
tsettIlim_sev
tOC_loff
RL = 1.6Ω, CL = 0.1µF to Within 10% of CR
RL< 1Ω, CL = 0.1µF to Within 10% of CR
TJ = 25oC
Fault Output Voltage
Vfault Fault Output Current = 10mA
ENABLE High Threshold
Ven_vih VIN = 5.5V
ENABLE Low Threshold
Ven_vil VIN = 2.7V
ENABLE Low Threshold
ENABLE Input Current
BIAS PARAMETERS
Enabled VIN Current
Disabled VIN Current
Under Voltage Lockout Threshold
UV Hysteresis
Over Temperature Disable
Ven_vil
Ien_i
VIN = 4.5V
ENABLE = 0V to 5V, VIN = 5V, TJ >25oC
IVDD
IVDD
VUVLH
UVHYS
Temp_dis
Switch Closed, OUTPUT = OPEN, TJ > 0oC
Switch Open, OUTPUT = OPEN
VIN Rising, Switch Enabled
MIN TYP MAX UNITS
- 60 70 mΩ
- - 80 mΩ
- 50 60 mΩ
- - 75 mΩ
- 50 60 mΩ
- - 75 mΩ
-
300 450
mV
- 10 - V/ms
- 10 - V/ms
- 3 - V/µs
1.5 2 2.5
-1 -
- 100 -
- 12 -
A
ms
µs
ms
--
2.0 -
--
--
-0.5 0
0.4 V
-V
0.6 V
0.8 V
0.5 µA
-
120 200
µA
- - 5 µA
1.7 2.25 2.5
V
50 100 - mV
- 150 -
oC
3
3Pages ISL6121
Typical Performance Curves (Continued)
1.6
1.4
1.2
1.0
0.8
0.6
0.4
0.2
0 3 4 5 6 7 8 9 10 1 12
FAULT CURRENT (A)
FIGURE 8. CR SETTLING TIME vs FAULT CURRENT
ENABLE
VOUT
CL = 100µF
CL = 0.1µF, 10µF
VOUT (1V/DIV.)
TIME (200µs/DIV.)
FIGURE 9. SLOW TURN-OFF vs CLOAD
CL = 10µF
CL=100µF
CL = 0.1µF
VOUT
VOUT (1V/ DIV.)
TIME (400µs /DIV.)
FIGURE 10. FAST TURN-OFF vs CLOAD
ENABLE
VOUT
VOUT
IOUT
12ms
TIME (2ms/DIV.)
FIGURE 11. ISL6121 TURN-ON INTO 3A OC
ENABLE
FAULT
VOUT
FAULT
ENABLE
IOUT
TIME (1ms/DIV.)
FIGURE 12. ISL6121 TURN-ON INTO A 6ms MOMENTARY OC
VOUT
TIME (2ms /DIV.)
FIGURE 13. VENDOR TURN-ON INTO A 6ms MOMENTARY OC
6
6 Page | |||
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部品番号 | 部品説明 | メーカ |
ISL6120 | Power Distribution Controllers | Intersil Corporation |
ISL6121 | Single Supply Integrated Current Limiting Controller | Intersil Corporation |
ISL6123 | Power Sequencing Controllers | Intersil Corporation |
ISL6124 | Power Sequencing Controllers | Intersil Corporation |