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MIC68400_09 Datasheet, PDF (6/15 Pages) Micrel Semiconductor – 4A Sequencing LDO with Tracking and Ramp Control
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Micrel, Inc.
Absolute Maximum Ratings(1)
Supply Voltage (VIN) .........................................................6V
Enable Input Voltage (VEN)...............................................6V
POR (VPOR)........................................................... VIN + 0.3V
RC ....................................................................... VIN + 0.3V
Power Dissipation .................................. Internally Limited(3)
Junction Temperature .........................–40°C ≤ TJ ≤ +125°C
Storage Temperature (TS)...................–65°C ≤ TJ ≤ +150°C
ESD Rating(4) ................................................................. 2kV
MIC68400
Operating Ratings(2)
Supply voltage (VIN) ....................................... 1.65V to 5.5V
Enable Input Voltage (VEN)..................................... 0V to VIN
Ramp Control (VRC)............................................. 0V to 5.5V
Junction Temperature Range ............–40°C ≤ TJ ≤ +125°C
Package Thermal Resistance
4x4 MLF-16 (θJA) ..............................................30°C/W
Electrical Characteristics(5)
TA = 25°C with VIN = VOUT + 1V; VEN = VIN; IOUT = 10mA; bold values indicate –40°C ≤ TJ ≤ +125°C, unless noted.
Parameter
Conditions
Min Typ Max Units
Output Voltage Accuracy
10mA < IOUT < IL(max), VOUT + 1 ≤ VIN ≤ 5.5V
-2
+2
%
Feedback Voltage
Adjustable version only
0.49 0.50 0.51
V
Feedback Current
Adjustable version only
20
nA
Output Voltage Line Regulation
Output Voltage Load Regulation
VIN = VOUT + 1V to 5.0V
IL = 10mA to 3A
0.06 0.5
%
0.5
1
%
VIN – VO; Dropout Voltage
IL = 1.5A
IL = 3.0A
IL = 4.0A
400 mV
300 500 mV
360 800 mV
Ground Pin Current
IL = 10mA
IL = 1.5A
IL = 3.0A
IL = 4.0A
1.2
mA
20
mA
55
mA
90 130 mA
Shutdown Current
VEN = 0V; VOUT = 0V
0.01 10
µA
Current Limit
VOUT = 0V; VIN = 3.0V
4.0 6.0
A
Start-up Time
VEN = VIN; CRC = Open
35
150
µs
Enable Input
Enable Input Threshold
Regulator enable
1
V
Regulator shutdown
0.2
V
Enable Hysteresis
20 120 200 mV
Enable Input Current
POR Output
VIL ≤ 0.2V (Regulator shutdown)
VIH ≥ 1V (Regulator enable)
0.02
µA
3
µA
IPOR(LEAK)
VPOR = 5.5V; POR = High
1
µA
2
µA
VPOR(LO)
Output Logic-Low Voltage (undervoltage condition),
IPOR = 1mA
60
90
mV
VPOR:
VOUT Ramping Up
VOUT Ramping Down
Threshold, % of VOUT below nominal
7.5
10 12.5
%
10 12.5 15
%
Hysteresis
3
%
Delay Current
VDELAY = 0.75V
0.7
1
1.3
µA
Delay Voltage (Note 6)
VPOR = High
1.185 1.235 1.285 V
August 2009
6
M9999-081809-C
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