MAX5086AATN [MAXIM]
65V, 250mA, Low-Quiescent-Current Linear Regulator with Adjustable Reset Delay;
| 型号： | MAX5086AATN |
| 厂家： | 
MAXIM INTEGRATED PRODUCTS |
| 描述： | 65V, 250mA, Low-Quiescent-Current Linear Regulator with Adjustable Reset Delay 输入元件 信息通信管理 |
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19-3878; Rev 1; 7/06
65V, 250mA, Low-Quiescent-Current
Linear Regulator with Adjustable Reset Delay
General Description
Features
ꢀ Wide Operating Input Voltage Range (6.5V to 65V)
ꢀ Thermally Enhanced Package Dissipates
The MAX5086 high-voltage linear regulator operates
from a 6.5V to 65V input voltage and delivers up to a
250mA output current. The device consumes only 70µA
of quiescent current with no load and 13µA in shut-
down. The device includes a SET input, that when con-
nected to ground, selects a preset output voltage of
3.3V (MAX5086A) or 5.0V (MAX5086B). Alternatively,
the output voltage can be adjusted from 2.5V to 11V by
simply connecting SET to the regulator’s output through
a resistive divider network. The MAX5086 also provides
an open-drain, active-low microprocessor reset output
that asserts when the regulator output drops below the
preset output voltage threshold. An external capacitor
programs the reset timeout period. Other features
include an enable input, thermal shutdown, and short-
circuit protection.
2.6W at T = +70°C (16-Pin TQFN)
A
3.8W at T = +70°C (56-Pin TQFN)
A
ꢀ Guaranteed 250mA Output Current
ꢀ 70µA Quiescent Supply Current
ꢀ Preset 3.3V, 5.0V, or Adjustable 2.5V to 11V
Output Voltage
ꢀ Remote Load Sense
ꢀ Integrated Microprocessor Reset Circuit with
Programmable Timeout Period
ꢀ Thermal and Short-Circuit Protection
ꢀ -40°C to +125°C Operating Temperature Range
Ordering Information
The MAX5086 operates over the automotive tempera-
ture range of -40°C to +125°C and is available in a
16-pin or a 56-pin TQFN thermally enhanced package.
OUTPUT
VOLTAGE
(V)
PKG
CODE
PART
PIN-PACKAGE
3.3
3.3
3.3
3.3
T1655-2
T1655-2
T5688-3
T5688-3
MAX5086AATE+
MAX5086AATE
MAX5086AATN+
MAX5086AATN
16 TQFN-EP*
16 TQFN-EP*
56 TQFN-EP*
56 TQFN-EP*
Applications
Automotive
Industrial
Home Security/Safety
Networking
Note: All devices specified over the -40°C to +125°C operating
temperature range.
+Denotes lead-free package.
*EP = Exposed paddle.
Ordering Information continued at end of data sheet.
Pin Configurations
TOP VIEW
42 41 40 39 38 37 36 35 34 33 32 31 30 29
N.C. 43
N.C. 44
N.C. 45
N.C. 46
N.C. 47
N.C. 48
N.C. 49
N.C. 50
N.C. 51
N.C. 52
N.C. 53
N.C. 54
N.C. 55
N.C. 56
28 N.C.
27 N.C.
26 N.C.
12 11 10
9
N.C.
GND
25
24
N.C. 13
N.C. 14
N.C. 15
N.C. 16
8
7
6
5
GND
23 OUTSENSE
OUTSENSE
OUT
OUT
OUT
N.C.
22
21
20
MAX5086
MAX5086
OUT
19 N.C.
18 N.C.
17 IN
+
1
2
3
4
16 IN
TQFN
+
15 N.C.
1
2
3
4
5
6
7
8
9
10 11 12 13 14
TQFN
________________________________________________________________ Maxim Integrated Products
1
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at
1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.
65V, 250mA, Low-Quiescent-Current
Linear Regulator with Adjustable Reset Delay
ABSOLUTE MAXIMUM RATINGS
IN to GND (do not exceed
Thermal Resistance:
package power dissipation)................................-0.3V to +70V
(θ , 16-Pin TQFN)....................................................30.0°C/W
JC
JA
IN to GND (T ≤ 300ms, I
≤ 250mA)..................-0.3V to +42V
(θ , 16-Pin TQFN)......................................................1.7°C/W
OUT
EN to GND..............................................................-0.3V to +70V
CT, RESET, SET, OUT, OUTSENSE to GND ..........-0.3V to +12V
IN to OUT................................................................-0.3V to +70V
(θ , 56-Pin TQFN)....................................................21.0°C/W
JA
(θ , 56-Pin TQFN)......................................................0.6°C/W
JC
Operating Temperature Range .........................-40°C to +125°C
Junction Temperature......................................................+150°C
Storage Temperature Range.............................-60°C to +150°C
Lead Temperature (soldering, 10s) .................................+300°C
Short-Circuit Duration (V < 16V) .............................Continuous
IN
Maximum Current into Any Pin (except IN, OUT)............. 20mA
Continuous Power Dissipation (T = +70°C)
A
16-Pin TQFN (derate 33.3mW/°C above +70°C) .......2666mW
56-Pin TQFN (derate 47.6mW/°C above +70°C) .......3809mW
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 = 14V, I
= 1mA, C = 10µF, C
= 15µF, V = 2.4V, 10kΩ from RESET to OUT, T = T = -40°C to +125°C, unless other-
IN
OUT
IN
OUT EN A J
A
wise noted. Typical specifications are at T = +25°C.) (Note 1)
PARAMETER
Input Voltage Range
SYMBOL
CONDITIONS
≥ V + 1.5V
OUT
MIN
TYP
MAX
65
UNITS
V
V
6.5
V
IN
IN
I
= 0
70
1250
13
115
OUT
OUT
Measured at GND,
SET = GND
Supply Current
I
µA
µA
Q
I
= 250mA
Shutdown Supply Current
REGULATOR
I
V
≤ 0.4V
21
SHDN
EN
Guaranteed Output Current
I
V
= 6.5V, V
= 5.0V
OUT
250
mA
OUT
IN
6.5V ≤ V ≤ 25V,
IN
4.85
5
5.15
5.15
5mA ≤ I
≤ 250mA
OUT
SET = GND,
5V Version
6.5V ≤ V ≤ 65V,
IN
4.85
5
5mA ≤ I
≤ 100mA
OUT
Output Voltage (Note 2)
V
V
OUT
6.5V ≤ V ≤ 25V,
IN
3.217
3.3
3.3
3.392
3.392
5mA ≤ I
≤ 250mA
OUT
SET = GND,
3.3V version
6.5V ≤ V ≤ 65V,
IN
3.217
2.5
5mA ≤ I
≤ 100mA
OUT
I
I
= 5mA, adjustable range
11.0
2.2
OUT
Dropout Voltage (Note 3)
∆V
= 250mA, V
= 5V
0.9
V
DO
OUT
OUT
Rising edge of V to V
R = 500Ω, SET = GND
L
,
OUT
IN
Startup Response Time (Note 4)
400
µs
5V version
-1
+1
∆V
∆V
/
OUT
Line Regulation
Enable Voltage
6.5V ≤ V ≤ 65V
mV/V
V
IN
IN
3.3V version
-0.5
2.4
+0.8
V
V
= high, regulator on
EN
EN
V
EN
= low, regulator off
0.4
2
_______________________________________________________________________________________
65V, 250mA, Low-Quiescent-Current
Linear Regulator with Adjustable Reset Delay
ELECTRICAL CHARACTERISTICS (continued)
(V = 14V, I
= 1mA, C = 10µF, C
= 15µF, V = 2.4V, 10kΩ from RESET to OUT, T = T = -40°C to +125°C, unless other-
IN
OUT
IN
OUT
A
EN
A
J
wise noted. Typical specifications are at T = +25°C.) (Note 1)
PARAMETER
Enable Input Current
SYMBOL
CONDITIONS
MIN
TYP
0.38
3.75
1.235
-1.5
MAX
UNITS
V
V
= 2.4V
= 14V
EN
EN
I
µA
EN
SET Reference Voltage
V
1.20
-100
1.26
100
V
SET
SET Input Leakage Current
I
nA
SET
∆V
∆I
/
OUT
Load Regulation
I
I
= 1mA to 250mA
0.045
-54
0.4
Ω
OUT
OUT
= 10mA, f = 100Hz, 500mV
= 5V
,
OUT
P-P
Power-Supply Rejection Ratio
PSRR
dB
V
OUT
Short-Circuit Current (Note 5)
Thermal Shutdown Temperature
Thermal Shutdown Hysteresis
RESET Voltage Threshold
I
V
< 16V
IN
440
175
25
92
2
mA
°C
SC
T
J(SHDN)
∆T
°C
J(SHDN)
V
V
89.91
94.10 % V
% V
RESET
OUT
OUT
RESET Threshold Hysteresis
RESET Output Low Voltage
RESET Output Leakage Current
RHYST
V
I
= 1mA
0.4
1
V
RL
SINK
I
V
= 5V
RESET
µA
RH
RESET Output Minimum Timeout
Period
When V
reaches RESET threshold,
OUT
15
µs
µs
V
C
= Open
CT
ENABLE to RESET Minimum
Timeout Period
When EN goes high, C = open
169
1.23
100
CT
Delay Comparator Threshold
(Rising)
1.196
1
1.264
4
Delay Comparator Threshold
Hysteresis
mV
CT Charge Current
2.26
5
µA
CT Discharge Current
mA
Note 1: Limits at -40°C are guaranteed by design.
Note 2: Output voltage is tested using a pulsed load current of less than 50ms duration.
Note 3: Dropout voltage is defined as (V - V ) when V is 100mV below the value of V
for V = V + 3V.
OUT
IN
OUT
OUT
OUT
IN
Note 4: Startup time measured from 50% of V to 90% of V
.
IN
OUT
Note 5: Continuous short-circuit protection for V > 16V not guaranteed.
IN
_______________________________________________________________________________________
3
65V, 250mA, Low-Quiescent-Current
Linear Regulator with Adjustable Reset Delay
Typical Operating Characteristics
(V = V = 14V, C = 10µF, C
= 15µF, V
= 5V, SET = GND, T = +25°C, unless otherwise specified.)
OUT A
IN
EN
IN
OUT
NO-LOAD SUPPLY CURRENT
vs. TEMPERATURE
SHUTDOWN SUPPLY CURRENT
vs. TEMPERATURE
OUTPUT VOLTAGE vs.
INPUT VOLTAGE
160
140
120
100
80
20
18
16
14
12
10
8
5.5
5.0
4.5
4.0
3.5
3.0
2.5
2.0
1.5
1.0
0.5
0
V
= +65V
IN
V
= +14V
IN
60
6
40
V
= +6.5V
IN
4
20
2
I
= 0
OUT
0
0
-40 -25 -10
5
20 35 50 65 80 95 110 125
-40 -25 -10
5
20 35 50 65 80 95 110 125 140
0
5
10 15 20 25 30 35 40 45 50 55 60 65
(V)
TEMPERATURE (°C)
TEMPERATURE (°C)
V
IN
OUTPUT VOLTAGE
vs. TEMPERATURE
GROUND CURRENT
vs. TEMPERATURE
OUTPUT VOLTAGE
vs. LOAD CURRENT AND TEMPERATURE
5.25
5.20
5.15
5.10
5.05
5.00
4.95
4.90
4.85
4.80
4.75
3.0
2.5
2.0
1.5
1.0
0.5
0
5.25
5.20
5.15
5.10
5.05
5.00
4.95
4.90
4.85
4.80
4.75
V
I
= +6.5V
V = +6.5V
IN
IN
I
= 50mA
OUT
I
= 100mA
OUT
I
= 100mA
OUT
= 50mA
I
= 250mA
OUT
OUT
I
= 250mA
OUT
I
= 5mA
OUT
-40 -25 -10
5
20 35 50 65 80 95 110 125 140
-40 -25 -10
5
20 35 50 65 80 95 110 125 140
-40 -25 -10
5
20 35 50 65 80 95 110 125 140
TEMPERATURE (°C)
TEMPERATURE (°C)
TEMPERATURE (°C)
DROPOUT VOLTAGE
vs. LOAD CURRENT
POWER-SUPPLY REJECTION RATIO
vs. FREQUENCY
LOAD-TRANSIENT RESPONSE
MAX5086 toc09
1.50
1.35
1.20
1.05
0.90
0.75
0.60
0.45
0.30
0.15
0
0
-10
-20
-30
-40
-50
-60
-70
-80
C
I
= 15µF
OUT
= 10mA
OUT
V
OUT
200mV/div
I
OUT
250mA
5mA
V
= +5V
OUT
0
25 50 75 100 125 150 175 200 225 250
(mA)
0.1
1
10
100
1000
400µs/div
I
FREQUENCY (kHz)
OUT
4
_______________________________________________________________________________________
65V, 250mA, Low-Quiescent-Current
Linear Regulator with Adjustable Reset Delay
Typical Operating Characteristics (continued)
(V = V = 14V, C = 10µF, C
= 15µF, V
= 5V, SET = GND, T = +25°C, unless otherwise specified.)
OUT A
IN
EN
IN
OUT
INPUT VOLTAGE STEP RESPONSE
STARTUP RESPONSE
ENABLE STARTUP RESPONSE
MAX5086 toc12
MAX5086 toc10
MAX5086 toc11
I
= 50mA
I
= 5mA
OUT
OUT
V
OUT
AC-COUPLED
EN
0V
1V/div
500mV/div
V
OUT
2V/div
0V
0V
0V
0V
0V
26V
V
IN
10V/div
V
OUT
V
IN
6.5V
2V/div
10V/div
V
OUT
= 14V
IN
0V
I
= 0
400µs/div
400µs/div
100µs/div
ENABLE STARTUP RESPONSE
ENABLE STARTUP RESPONSE
ENABLE STARTUP RESPONSE
MAX5086 toc15
MAX5086 toc13
MAX5086 toc14
EN
1V/div
EN
1V/div
EN
1V/div
0V
0V
0V
0V
0V
0V
V
V
V
OUT
2V/div
OUT
2V/div
OUT
2V/div
V
I
= 14V
OUT
V
I
= 65V
IN
OUT
V
I
= 65V
= 0
IN
IN
OUT
= 250mA
= 250mA
100µs/div
100µs/div
100µs/div
GROUND CURRENT DISTRIBUTION
(T = +125°C)
GROUND CURRENT DISTRIBUTION
(T = -40°C)
SHUTDOWN RESPONSE
A
A
MAX5086 toc16
40
35
30
25
20
15
10
5
40
35
30
25
20
15
10
5
138 UNITS TESTED
138 UNITS TESTED
I
= 5mA
OUT
0V
0V
EN
1V/div
V
OUT
2V/div
0
0
20ms/div
65 66 67 68 69 70 71 72 73 74
(µA)
64 65 66 67 68 69 70 71 72 73 74
(µA)
I
I
GND
GND
_______________________________________________________________________________________
5
65V, 250mA, Low-Quiescent-Current
Linear Regulator with Adjustable Reset Delay
Pin Description
PIN
NAME
N.C.
EN
FUNCTION
16-PIN TQFN
56-PIN TQFN
1–13, 15,
18, 19, 20,
1, 12–16
No Connection. Not internally connected.
25–28, 32–56
Enable Input. Drive EN high to turn on the regulator. Force EN low to place the
device in shutdown mode.
2
14
Regulator Input. Supply voltage ranges from 6.5V to 65V. Bypass IN to GND with a
10µF capacitor.
3, 4
5, 6
16, 17
21, 22
IN
OUT
Regulator Output. Connect at least a 15µF low-ESR capacitor from OUT to GND.
Regulator Output Feedback Point. OUTSENSE must be connected to OUT for fixed
7
8
9
23
24
29
OUTSENSE output voltage versions. Leave OUTSENSE open circuit for adjustable output
voltage version.
GND
Ground
Feedback Regulation Set Point. Connect SET to GND for a fixed 3.3V output
(MAX5086A) or 5.0V output (MAX5086B). Connect an external resistive divider network
from OUTSENSE to SET to GND to adjust the output voltage from 2.5V to 11V.
SET
Open-Drain Active-Low Reset Output. Connect a 10kΩ pullup resistor from RESET
to any supply voltage up to 11V to create a logic output.
10
11
EP
30
31
EP
RESET
CT
Reset Timeout Setting Connection. A 2µA charging current is available at CT.
Connect a capacitor from CT to GND to set the reset timeout period (see the
Adjustable Reset Timeout Period (CT) section).
Exposed Pad. Connect externally to a large ground plane to aid heat dissipation.
Do not use EP as the only ground connection.
EP
6
_______________________________________________________________________________________
65V, 250mA, Low-Quiescent-Current
Linear Regulator with Adjustable Reset Delay
IN
ERROR
AMPLIFIER
MAX5086
OUT
V
REF
CONTROL LOGIC,
THERMAL SHUTDOWN,
AND
OUTSENSE
EN
OVERCURRENT
PROTECTION
INTERNAL
SUPPLY VOLTAGE
SET
CT
2µA
CT
DELAY
COMPARATOR
COMPARATOR
RESET
0.92 x V
REF
GND
Figure 1. Functional Diagram
_______________________________________________________________________________________
7
65V, 250mA, Low-Quiescent-Current
Linear Regulator with Adjustable Reset Delay
Detailed Description
The MAX5086 high-voltage linear regulator includes an
6.5V TO 65V
2.5V TO 11V
15µF
integrated microprocessor reset circuit with an
adjustable reset timeout period (see the Adjustable
Reset Timeout Period (CT) section). The device guaran-
tees a 250mA load current and is available with a pre-
set output voltage of 3.3V (MAX5086A) or 5V
(MAX5086B). Both devices can be configured to pro-
vide an adjustable output voltage from 2.5V to 11V. The
internal reset circuit monitors the regulator output volt-
age and asserts RESET low when the regulator output
falls below the reset threshold voltage. Other features
include an enable (regulator control input), 21µA (max)
shutdown current, short-circuit protection (see the
Output Short-Circuit Current Limit section), and thermal
shutdown (see the Thermal Protection section).
IN
OUT
10µF
R1
R3
MAX5086
ON
EN
CT
OUTSENSE
OFF
TO µP
RESET
SET
GND
C
CT
R2
V
OUT
V
SET
= V (1 + R1/R2)
SET
= 1.23V
Regulator
The MAX5086 accepts an input voltage range from
6.5V to 65V and offers a fixed output voltage of 3.3V or
5V. For an adjustable output voltage operation, use an
external resistive divider network connected between
OUT, SET, and GND (see Figure 2).
Figure 2. Setting the Adjustable Output Voltage
timeout period (see Figure 2) and use the following
equation to calculate the timeout period:
6
t
= C x 0.6175 x 10
CT
RP
Enable Input (EN)
EN is a logic-level enable input that turns ON/OFF the
device. Drive EN high to turn on the device and drive
EN low to place the device in shutdown. The MAX5086
draws 13µA (typ) of supply current when in shutdown.
EN withstands voltages up to +65V, allowing EN to be
connected to IN for an always-on operation.
where C
is the value of the external capacitor con-
CT
nected from CT to GND and t is in seconds.
RP
Thermal Protection
When the junction temperature exceeds T = 175°C an
J
internal thermal sensor signals the shutdown logic,
which turns off the pass transistor, allowing the IC to
cool. The thermal sensor turns the pass transistor on
again after the IC’s junction temperature cools by 25°C,
resulting in a cycled output during continuous thermal-
overload conditions. Thermal protection protects the
MAX5086 in the event of fault conditions. During contin-
uous operation, do not exceed the absolute maximum
Remote Sensing (OUTSENSE)
For fixed output voltage versions, OUTSENSE must be
used for load voltage sensing. Leave OUTSENSE open
circuit when using adjustable output voltage version.
Reset Output (RESET)
A supervisor circuit is fully integrated in the MAX5086
and uses the same reference voltage as the regulator.
junction temperature rating of T = +150°C.
J
RESET goes low if V
drops below the preset output
OUT
Output Short-Circuit Current Limit
voltage threshold, and remains low at least for the time-
The MAX5086 features a current limit. The output can
be shorted to GND for an indefinite period of time (for
out period after V
threshold.
rises above the reset voltage
OUT
V
< 16V) without damage to the device.
IN
Adjustable Reset Timeout Period (CT)
The MAX5086 features a user-adjustable reset timeout.
Connect a capacitor from CT to GND to set the reset
8
_______________________________________________________________________________________
65V, 250mA, Low-Quiescent-Current
Linear Regulator with Adjustable Reset Delay
Applications Information
Output Voltage Selection
The MAX5086 features dual-mode operation, in either a
4.0
preset voltage mode or an adjustable mode. In preset
3.809W
3.5
voltage mode, internal feedback resistors set the
(56-PIN TQFN)
DERATE
47.6mW/°C
MAX5086’s output voltage to +3.3V or +5V. Select pre-
3.0
set voltage mode by connecting SET to ground. In
2.5
2.0
1.5
1.0
0.5
0
2.666W
(16-PIN TQFN)
adjustable mode, select an output between +2.5V and
+11V using two external resistors connected as a volt-
age-divider to SET (Figure 2). Set the output voltage
using the following equation:
DERATE
33.3mW/°C
R1
R2
V
OUT
= V
x 1 +
SET
0
20
40
60
80 100 120 140
where V
= 1.23V and R2 is chosen to be approxi-
TEMPERATURE (°C)
SET
mately 100kΩ.
Figure 3. Calculated Maximum Power Dissipation vs.
Temperature
Available Output Current Calculation
The MAX5086 high-voltage regulator provides up to
250mA of output current. The input voltage extends to
+65V. Package power dissipation limits the amount of
output current available for a given input/output voltage
and ambient temperature. Figure 3 depicts the maxi-
mum power dissipation curve for these devices. The
graph assumes that the exposed pad of the MAX5086
package is set up per JEDEC specifications.
After determining the allowable package dissipation
calculate the maximum output current using the follow-
ing formula:
P
D
I
≅
≤ 250mA
OUT(MAX)
V
− V
OUT
IN
Use Figure 3 to determine the allowable package dissi-
pation (P ) for a given ambient temperature.
D
Alternately, use the following formulas to calculate the
allowable package dissipation:
The above equations do not include the negligible
power dissipation from self-heating due to the IC
ground current.
For the 56-pin TQFN package:
Example 1: MAX5086BATN
T = +105°C
A
3.809W for T ≤ +70°C
A
V
V
= +14V
IN
W
°C
P
=
3.809W − 0.0476
x (T −70°C)
A
D
= +5V
OUT
For +70°C < T ≤ +125°C
Find the maximum allowable output current. First calcu-
late package dissipation at the given temperature as
follows:
A
For the 16-pin TQFN package:
2.666W for T ≤ +70°C
W
°C
A
P
= 3.809W − 0.0476
(105°C − 70°C) = 2.143W
D
W
°C
P
D
=
2.666W − 0.0333
x (T −70°C)
A
Then determine the maximum output current:
(2.143W)
For +70°C < T ≤ +125°C
A
I
=
= 238mA
OUT(MAX)
(14V)− (5V)
_______________________________________________________________________________________
9
65V, 250mA, Low-Quiescent-Current
Linear Regulator with Adjustable Reset Delay
Example 2: MAX5086AATN
T = +125°C
MAXIMUM OUTPUT CURRENT
vs. INPUT VOLTAGE
A
V
V
= +14V
IN
OUT
0.30
0.25
0.20
0.15
0.10
0.05
0
V
= 5V
OUT
= +3.3V
(56-PIN TQFN)
Calculate package dissipation at the given temperature
as follows:
T
T
T
= +70°C
= +85°C
= +125°C
A
A
A
W
°C
P
= 3.809W − 0.0476
(125°C − 70°C) = 1.191W
D
And establish the maximum current:
(1.191W)
I
=
= 111.3mA
OUT(MAX)
(14V)− (3.3V)
0
5
10 15 20 25 30 35 40 45 50 55 60 65
(V)
V
IN
Example 3: MAX5086BATN
T = +50°C
A
Figure 4a. Maximum Output Current vs. Input Voltage (56-Pin
TQFN)
V
V
= +14V
IN
= +5V
OUT
Calculate package dissipation at the given temperature
as follows:
MAXIMUM OUTPUT CURRENT
vs. INPUT VOLTAGE
0.30
P
D
= 3.809W
V
= 5V
OUT
(16-PIN TQFN)
And find the maximum output current:
0.25
0.20
0.15
0.10
0.05
0
T
T
T
= +70°C
= +85°C
= +125°C
A
A
A
(3.809W)
(14V)− (5V)
I
=
= 423.2mA⇒I = 250mA
OUT(MAX)
OUT(MAX)
In Example 3, the maximum output current is calculated
as 423mA, however, the maximum output current can-
not exceed 250mA.
Use Figures 4a and 4b to quickly determine maximum
allowable output current for selected ambient temper-
atures.
0
5
10 15 20 25 30 35 40 45 50 55 60 65
(V)
V
IN
Output Capacitor Selection and
Regulator Stability
Figure 4b. Maximum Output Current vs. Input Voltage (16-Pin
TQFN)
For stable operation over the full temperature range
and with load currents up to 250mA, use a 15µF (min)
output capacitor with an ESR < 0.25Ω. To reduce noise
and improve load-transient response, stability, and
power-supply rejection, use larger output capacitor val-
ues such as 22µF.
operating temperatures. To improve power supply
rejection and transient response, use a minimum 10µF
capacitor from IN to GND.
Some ceramic capacitor dielectrics exhibit large
capacitance and ESR variation with temperature. For
capacitor dielectrics such as Y5V, use 22µF or more
to ensure stability at temperatures below -10°C. With
X7R or X5R dielectrics, 15µF should be sufficient at all
10 ______________________________________________________________________________________
65V, 250mA, Low-Quiescent-Current
Linear Regulator with Adjustable Reset Delay
Ordering Information (continued)
OUTPUT
PKG
VOLTAGE
(V)
PART
PIN-PACKAGE
CODE
5.0
5.0
5.0
5.0
T1655-2
T1655-2
T5688-3
T5688-3
MAX5086BATE+
MAX5086BATE
MAX5086BATN+
MAX5086BATN
16 TQFN-EP*
16 TQFN-EP*
56 TQFN-EP*
56 TQFN-EP*
Note: All devices specified over the -40°C to +125°C operating
temperature range.
+Denotes lead-free package.
*EP = Exposed paddle.
Chip Information
TRANSISTOR COUNT: 1386
PROCESS: BiCMOS
______________________________________________________________________________________ 11
65V, 250mA, Low-Quiescent-Current
Linear Regulator with Adjustable Reset Delay
Package Information
(The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information,
go to www.maxim-ic.com/packages.)
12 ______________________________________________________________________________________
65V, 250mA, Low-Quiescent-Current
Linear Regulator with Adjustable Reset Delay
Package Information (continued)
(The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information,
go to www.maxim-ic.com/packages.)
______________________________________________________________________________________ 13
65V, 250mA, Low-Quiescent-Current
Linear Regulator with Adjustable Reset Delay
Package Information (continued)
(The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information,
go to www.maxim-ic.com/packages.)
PACKAGE OUTLINE
56L THIN QFN, 8x8x0.8mm
1
E
21-0135
2
14 ______________________________________________________________________________________
65V, 250mA, Low-Quiescent-Current
Linear Regulator with Adjustable Reset Delay
Package Information (continued)
(The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information,
go to www.maxim-ic.com/packages.)
PACKAGE OUTLINE
56L THIN QFN, 8x8x0.8mm
2
E
21-0135
2
Revision History
Pages changed at Rev 1: 2, 15
Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are
implied. Maxim reserves the right to change the circuitry and specifications without notice at any time.
Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 ____________________ 15
© 2006 Maxim Integrated Products
is a registered trademark of Maxim Integrated Products, Inc.
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