Operating Temperature Range ........................... -40°C to +85°C
Operating Junction Temperature Range .......... -40°C to +125°C
Storage Temperature Range ............................ -65°C to +150°C
Lead Temperature (soldering, 10s) ................................. +300°C
Soldering Temperature (reflow) .......................................+260°C
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these
or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect
device reliability.
Electrical Characteristics
(V
IN
= V
OUT
+ 1V,
SHDN
= IN, C
OUT
= 3.3µF, T
A
= -40°C to +85°C, unless otherwise noted. Typical values are at T
A
= +25°C.) (Note 1)
PARAMETER
Operating Voltage
Input Undervoltage Lockout
Threshold
Input Undervoltage Lockout
Threshold Hysteresis
Quiescent Current
SYMBOL
V
IN
V
UVLO
V
IN
rising
CONDITIONS
MIN
2.5
2.00
50
SHDN
= IN, I
OUT
= 0A
SHDN
= IN, I
OUT
= 0A,
V
UVLO
< V
IN
< V
OU
T (nominal)
SHDN
= GND, I
OUT
= 0A
Dropout Voltage (Note 2)
Output Voltage Accuracy
Output Current
Output Current Limit
Reverse Current at V
IN
Soft-Start Time (Note 3)
t
SS
I
OUT
V
OUT
= 0V
V
OUT
= 5.5V, V
IN
= 0V to V
OUT
C
SS
= not connected
C
SS
= 0.01µF
C
SS
= 0.1µF
Line Regulation (Note 4)
Load Regulation
Output Noise
SHUTDOWN INPUT (SHDN)
OUT Discharge Resistance in
Shutdown (MAX4835)
SHDN
Input-Voltage High
SHDN
Input-Voltage Low
SHDN
Input Hysteresis
SHDN
Input Leakage Current
SHDN
= IN or GND
-100
V
OUT
+ 0.5V < V
IN
<
5.5V, I
LOAD
= 100µA
T
A
= +25°C
T
A
= -40°C to +85°C
0.5
4
40
-0.04
-0.05
I
OUT
= 250mA
T
A
= +25°C
T
A
= -40°C to +85°C
-1.3
-2
250
270
0.1
1
10
100
+0.02
+0.03
1.3
70
330
2
2.0
15
150
+0.065
+0.08
%V
NOM
/V
%V
NOM
µV
RMS
W
V
0.5
30
+100
V
mV
nA
ms
90
150
0.1
103
2
140
165
+1.3
+2
mV
%V
NOM
mA
mA
µA
150
µA
TYP
MAX
5.5
2.25
UNITS
V
V
mV
I
Q
I
OUT
= 1mA to 250mA, T
A
= +25°C
I
OUT
= 1mA to 250mA, T
A
= -40°C to +85°C
100µA < I
LOAD
< 250mA, V
IN
= V
OUT
+ 1V
10Hz to 100kHz, C
SS
= 0.01µF
SHDN
= GND
V
IH
V
IL
1.4
900
www.maximintegrated.com
Maxim Integrated
│
2
MAX4834/MAX4835
250mA LDO Linear Regulators
with Current-Limiting Switch
Electrical Characteristics (continued)
(V
IN
= V
OUT
+ 1V,
SHDN
= IN, C
OUT
= 3.3µF, T
A
= -40°C to +85°C, unless otherwise noted. Typical values are at T
A
= +25°C.) (Note 1)
PARAMETER
RESET OUTPUT (MAX4835)
RESET
Threshold
OUT Drop to RESET Delay
(Note 5)
V
RESET
t
OR
D1 timing option
RESET
Timeout Period
t
RESET
D2 timing option
D3 timing option
D4 timing option
V
OUT
≥ 1.0V, I
SINK
= 50µA,
RESET
asserted
V
OUT
≥ 1.5V, I
SINK
= 3.2mA,
RESET
asserted
V
OUT
≥ 2.0V, I
SOURCE
≤ 500µA,
RESET
deasserted
t
BLANK
V
OUT
+ 1V ≤ V
IN
≤ 5.5V, OUT = GND
I
SINK
= 3.2mA,
FLAG
asserted, V
OUT
≥ 1.5V
V
FLAG
= 5.5V
0.01
0.8 x
V
OUT
5
10
17
0.4
1
2.5
20
150
1200
0.85 x 0.875 x 0.90 x
V
OUT
V
OUT
V
OUT
35
3.75
30
225
1800
5.0
40
300
2400
0.3
V
0.4
V
ms
V
µs
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
RESET
Output-Voltage Low
RESET
Output-Voltage High
FLAG
OUTPUT (MAX4834)
Blanking Time (Note 6)
Open-Drain
FLAG
Output-
Voltage Low
Open-Drain
FLAG
Leakage
Current
THERMAL PROTECTION
Thermal-Shutdown Temperature
Thermal-Shutdown Hysteresis
ms
V
µA
Junction temperature rising
+165
15
°C
°C
Note 1:
Parts are 100% tested at +25°C. Limits across the full temperature range are guaranteed by design and correlation over the
specified temperature range.
Note 2:
The dropout voltage is measured from V
IN
to V
OUT
when V
OUT
is 2% below its nominal value. The nominal output voltage
is measured from V
OUT
to GND when V
IN
is 1V greater than V
OUT
. Defined only for V
OUT
≥ 2.5V.
Note 3:
Soft-start time is defined as the time required for the output to rise from 10% of its nominal value to 90% of its nominal
value.
Note 4:
For V
OUT
< 2V, V
IN
must be above 2.5V.
Note 5:
This is the maximum time OUT can be out of tolerance before a reset is issued. It is implemented to ensure that momentary
output glitches do not trigger a reset condition.
Note 6:
In startup mode, the blanking time counter is not started until the soft-start time has elapsed. The total time from startup to
京公网安备 11010802033920号
EEWORLD
