= 25°C, unless otherwise specified. The Boldface applies
over the junction temperature range. Adjustable versions are set to 5.0V.
PARAMETER
CONDITIONS
FLAG OUTPUT (ERROR COMPARATOR)
Output Leakage
Current
Output Low Voltage
Upper Threshold
Voltage
Lower Threshold
Voltage
Hysteresis
ENABLE Input
Input Logic Voltage
Low (OFF)
High (ON)
ENABLE Input Pin
V
IN
<10V
2.4
V
EN
=16V
V
EN
=0.8V
Regulator Output
Current in Shutdown
Thermal Resistance
(Note 10)
TO-200 Junction to Case, at Tab
TO-220 Junction to Ambient
TO-263 Junction to Case, at Tab
TO-263 Junction to Ambient
10
3
60
3
60
100
600
750
1
2
500
µA
µA
µA
°C/W
V
OH
=16V
Device set for 5V,V
IN
=4.5V, I
OL
=250µA
Device set for 5V, (Note 9)
Device set for 5V, (Note 9)
Device set for 5V, (Note 9)
TYP
0.01
220
60
75
15
SPX29301/02
0.8
V
40
25
95
140
MIN
MAX
SPX29301/03
1
2
300
400
UNITS
µA
mV
mV
mV
mV
NOTES:
Note 1: Maximum positive supply voltage of 20V must be of limited duration (<100ms) and duty cycle of less than 1%. The maximum continuous supply
voltage is 16V.
Note 2: Full load current (I
FL
) is defined as 3.0A.
Note 3: Dropout voltage is defined as the input to output differential when the output voltage drops to 99% of its nominal value.
Note 4: V
IN
= V
OUT (NOMINAL)
+1V. For example, use V
IN
= 4.3V for a 3.3V regulator. Employ pulse-testing procedures to minimize temperature rise.
Note 5: Ground pin current is the regulator quiescent current. The total current drawn from the source is the sum of the load current to the ground current.
Note 6: Output voltage temperature coefficient is defined as the worst case voltage change divided by the total temperature range
Note 7: Thermal regulation is defined as the change in output voltage at time T after a change in power dissipation is applied, excluding load / line regulation effects.
Specifications for a 200mA load pulse as V
IN
= 20V (a 4W pulse) for t = 10ms.
Note 8: V
REF
≤
V
OUT
≤
(V
IN
-1), 2.3V≤V
IN
≤
16V, 10mA
≤
I
L
≤
I
FL
, T
j
< T
jmax
.
Note 9: Comparator threshold is expressed in terms of a voltage differential at the Adjust terminal below the nominal reference voltage measured 6V input. To
express these thresholds in terms of output voltage change, multiply the error amplifier gain = V
OUT
/V
REF
= (R1 + R2)/R2. For example, at a programmable
output voltage of 5V, the Error output is guaranteed to go low when the output drops by 95mVx 5V/ 1.240V = 38mV. Threshold remain constant as a percent of
V
OUT
as V
OUT
is varied, with the dropout warning occurring at typically 5% below nominal, 7.7% guaranteed.
Note 10: V
EN
≤
0.8V and V
IN
≤
16V, V
OUT
= 0.
BLOCK DIAGRAM
IN
O.V
I
LIMIT
FLAG
+
-
1.180V
Reference
1.240V
+
-
ADJ
EN
Thermal
Shutdown
28V
R1*
OUT
R2*
GND
Date: 6/29/05
SPX29300/01/02/03 3A Low Dropout Voltage Regulator
白光LED光衰原因之荧光粉性能的衰退 到目前，白光 LED、尤其是小功率白光 LED 的发光性能快速衰退已越来越为人们所认识。其实，盲目地夸大宣传，只能将 LED 行业引向歧途，不正视白光 LED 存在的问题，只能延缓白光 LED 应用的发展。只有正视问题、研究问题、尽早解决问题，白光 LED 才能健康、快速发展。 白光 LED 当前面临的一个主要问题就寿命问题。由于白光 LED 的价格尚很...[详细]
FPGA/CPLD
京公网安备 11010802033920号
Copyright © 2005-2026 EEWORLD.com.cn, Inc. All rights reserved
电子工程世界
