MAX16910_12 [MAXIM]
200mA, Automotive, Ultra-Low Quiescent Current, Linear Regulator; 的200mA，汽车，超低静态电流，线性稳压器
| 型号： | MAX16910_12 |
| 厂家： | 
MAXIM INTEGRATED PRODUCTS |
| 描述： | 200mA, Automotive, Ultra-Low Quiescent Current, Linear Regulator |
| 文件： | 总15页 (文件大小：1754K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
19-4816; Rev 3; 4/12
200mA, Automotive, Ultra-Low
Quiescent Current, Linear Regulator
General Description
Features
The MAX16910 ultra-low quiescent current, high-voltage
linear regulator is ideal for use in automotive and battery-
operated systems. The device operates from a +3.5V to
+30V input voltage, delivers up to 200mA of load cur-
rent, and consumes only 20µA of quiescent current at
no load. The device consumes only 1.6µA current when
in shutdown. The input is +45V transient tolerant and is
designed to operate under load-dump conditions. The
MAX16910 can be configured as either fixed output volt-
age (+3.3V or +5V) or adjustable output voltage using an
external resistive divider.
S Low 20µA Quiescent Current
S +3.5V to +30V Wide Input Voltage Range, +45V
Tolerant
S Operates Through Cold-Crank Conditions
S Low-Dropout Voltage of 280mV at 200mA
S Up to 200mA Output Current Capability
S Stable Operation with Tiny 4.7µF Output Capacitor
S User-Selectable Output Voltage
+3.3V or +5V Fixed
The MAX16910 features an open-drain, active-low RESET
output with fixed thresholds offered at 92.5% and 87.5%
of the output voltage. The RESET output remains low for
a fixed period of 60µs after the output voltage exceeds
its threshold. The RESET delay can be extended with an
external capacitor.
+1.5V to +11V Adjustable with External
Resistive Divider
S Open-Drain RESET Output with Adjustable Delay
S Fixed-Reset Threshold Options: 87.5% or 92.5%
S High-Voltage Enable Input (+45V)
The MAX16910 includes an enable input, short-circuit
protection, and thermal shutdown. The MAX16910 oper-
ates over the -40°C to +125°C automotive temperature
range. The device is available in a space-saving, ther-
mally enhanced, 3mm x 3mm, 8-pin TDFN package and
5mm x 4mm, 8-pin SO package.
S Thermal and Short-Circuit Protection
S Operating -40°C to +125°C Temperature Range
S Operating -40°C to +150°C (T ) Temperature
J
Range
S Automotive Qualified
Applications
Automotive
Industrial
Telecom
Typical Operating Circuits
5V FIXED OUTPUT
IN
OUT
1µF
SETOV
V
CC
ENABLE
4.7µF
10kI
+
-
µC
RESET
14V
BATTERY
MAX16910
I/O
SET
RESET
GND
TIMEOUT
1nF
(1.25ms DELAY)
Typical Operating Circuits continued on next page.
Ordering Information/Selector Guide appears at end of data sheet.
_______________________________________________________________ Maxim Integrated Products
1
For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,
or visit Maxim’s website at www.maxim-ic.com.
Typical Operating Circuits (continued)
3.3V FIXED OUTPUT
IN
OUT
1µF
V
CC
ENABLE
MAX16910
4.7µF
+
-
µC
RESET
10kI
SETOV
RESET
14V
BATTERY
I/O
SET
GND
TIMEOUT
1nF
(1.25ms DELAY)
ADJUSTABLE OUTPUT
IN
OUT
1µF
R1
R2
ENABLE
MAX16910
SETOV
+
V
CC
14V
BATTERY
-
SET
4.7µF
10kI
µC
RESET
I/O
GND
RESET
TIMEOUT
1nF
(1.25ms DELAY)
200mA, Automotive, Ultra-Low
Quiescent Current, Linear Regulator
Pin Configurations
TOP VIEW
TOP VIEW
8
7
6
5
+
IN
ENABLE
SET
1
2
3
4
8
7
6
5
OUT
GND
MAX16910
SETOV
TIMEOUT
*EP
MAX16910
RESET
*EP
4
+
SO
1
2
3
*CONNECT EXPOSED PAD TO GND.
TDFN
*CONNECT EXPOSED PAD TO GND.
_______________________________________________________________________________________
3
200mA, Automotive, Ultra-Low
Quiescent Current, Linear Regulator
ABSOLUTE MAXIMUM RATINGS
(All voltages referenced to GND.)
Operating Temperature Range..........................-40°C to +125°C
IN, ENABLE, SET.................................................. -0.3V to +45V
OUT, RESET (open-drain output)............................-0.3V to +12V
SETOV, TIMEOUT....................................................-0.3V to +6V
Maximum Current (all pins except IN and OUT)...............50mA
Junction Temperature......................................................+150°C
Storage Temperature Range..............................-65°C to +150°C
Lead Temperature (soldering, 10s).................................+300°C
Soldering Temperature (reflow) ......................................+260°C
Continuous Power Dissipation (T = +70°C)
A
TDFN (derate 24.4mW/°C above +70°C)*.............1951mW
SO (derate 23.3mW/°C above +70°C)*................1861mW
*As per JEDEC51 Standard (multilayer board).
PACKAGE THERMAL CHARACTERISTICS (Note 1)
TDFN
Junction-to-Ambient Thermal Resistance (q )...........41°C/W
SO
Junction-to-Ambient Thermal Resistance (q )...........43°C/W
JA
JA
Junction-to-Case Thermal Resistance (q )..................8°C/W
Junction-to-Case Thermal Resistance (q )..................7°C/W
JC
JC
Note 1:Package thermal resistances were obtained using the method described in JEDEC specification JESD51-7, using a four-layer
board. For detailed information on package thermal considerations, refer to www.maxim-ic.com/thermal-tutorial.
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 = V
= +14V, C
= open, C = 1µF, C
= 4.7µF, unless otherwise noted. T = -40°C to +125°C, T P T P
IN
ENABLE
TIMEOUT
IN
OUT
A
A
J
+150°C, unless otherwise noted. Typical values are T = +25°C.) (Note 2)
A
PARAMETER
Supply Voltage Range
Supply Current
SYMBOL
CONDITIONS
MIN
TYP
MAX
30
45
30
3
UNITS
V
Continuous
3.5
V
IN
For P 400ms
I
= 0mA, SET = GND, V
= 5V
20
1.6
3
FA
LOAD
OUT
ENABLE = GND, T = +25NC
A
Shutdown Supply Current
I
FA
SHDN
ENABLE = GND, -40NC P T P +125NC
A
1mA P I
P 200mA,
LOAD
4.9
5.0
5.1
V
IN
= 6V to 30V (Note 3)
Output Voltage
(5V Fixed Output Setting)
V
V
V
OUT50
1mA P I
P 50mA,
LOAD
4.9
5.0
3.3
3.3
5.1
V
IN
= 6V to 30V, T = +150°C (Notes 3, 4)
J
1mA P I
P 200mA, V = 4.8V to 30V
IN
LOAD
3.234
3.234
3.366
3.366
(Note 3)
Output Voltage
(3.3V Fixed Output Setting)
V
OUT33
1mA P I
P 50mA, V = 4.8V to 30V,
LOAD
IN
T = +150°C (Notes 3, 4)
J
Adjustable Output-Voltage Range
SETOV FB Voltage
V
1.5
11.0
V
V
OUT
V
I
I
= 1mA (Note 4)
1.225
1.25
280
1.275
SETOV
LOAD
LOAD
= 200mA, SET = GND, SETOV =
600
600
HIGH, V
= +5.0V
OUT(NORM)
Dropout Voltage (Note 5)
DV
mV
DO
I
= 50mA, SET = GND, SETOV =
LOAD
HIGH, V
= +5.0V, T = +150°C
J
OUT(NORM)
(Notes 3, 4)
4
______________________________________________________________________________________
200mA, Automotive, Ultra-Low
Quiescent Current, Linear Regulator
ELECTRICAL CHARACTERISTICS (continued)
(V = V
= +14V, C
= open, C = 1µF, C
= 4.7µF, unless otherwise noted. T = -40°C to +125°C, T P T P
IN
ENABLE
TIMEOUT
IN
OUT
A
A
J
+150°C, unless otherwise noted. Typical values are T = +25°C.) (Note 2)
A
PARAMETER
Short-Circuit Output Current Limit
Thermal Shutdown
SYMBOL
CONDITIONS
Output shorted to GND (MAX16910C__)
(Note 6)
MIN
TYP
330
MAX
UNITS
mA
I
230
SC
+180
+25
NC
Thermal Shutdown Hysteresis
(Note 6)
NC
Line Regulation
(5V Fixed Output Setting)
V
V
= 6V to 30V, I
= 1mA
1
1
mV
mV
mV
IN
LOAD
Line Regulation
(3.3V Fixed Output Setting)
= 4.8V to 30V, I
= 1mA
IN
LOAD
Load Regulation
(5V Fixed Output Setting)
I
= 1mA to 200mA
= 1mA to 200mA
12
LOAD
Load Regulation
(3.3V Fixed Output Setting)
I
I
12
60
mV
dB
Fs
LOAD
= 10mA, f = 100Hz, 500mV
LOAD
P-P
Power-Supply Rejection Ratio
Startup Response Time
PSRR
(Note 6)
Rising edge of V to V
(Note 6)
, I
= 50mA
IN
OUT LOAD
t
160
START
TIMEOUT INPUT
TIMEOUT Ramp Current
TIMEOUT Ramp Delay
I
TIMEOUT connected to GND
rising, TIMEOUT = OPEN
0.600
30
1.0
1.25
60
1.650
90
FA
ms/nF
Fs
TO
V
OUT
RESET Default Timeout Period
RESET OUTPUT
MAX16910__9/V+, V
MAX16910__8/V+, V
falling
falling
90
85
92.5
87.5
94
89
OUT
% of
RESET Threshold
V
OUT
OUT
% of
5
4
RESET Threshold Hysteresis
OUT to RESET Delay
V
V
rising
OUT
OUT
V
OUT
falling (Note 6)
= 0.5mA, RESET asserted
Fs
RESET Output-Voltage Low
(Open-Drain)
V
OL
0.4
1
V
I
SINK
RESET Open-Drain Leakage
Current
RESET not asserted, RESET = 7V,
T = +25NC
A
FA
FA
RESET Open-Drain Leakage
Current
0.03
RESET not asserted, RESET = 7V
ENABLE
ENABLE Logic-Low
ENABLE Logic-High
ENABLE Pulldown Current
SET INPUT
V
0.4
V
V
IL
V
IH
2.4
-50
2.4
(Note 7)
0.65
0.2
FA
T
= +25NC
+50
0.4
nA
FA
V
A
SET Input Current (All Modes)
T = +150NC
J
SET Logic-Low
Set Logic-High
V
ILSET
V
V
IHSET
_______________________________________________________________________________________
5
200mA, Automotive, Ultra-Low
Quiescent Current, Linear Regulator
ELECTRICAL CHARACTERISTICS (continued)
(V = V
IN
= +14V, C
= open, C = 1µF, C
= 4.7µF, unless otherwise noted. T = -40°C to +125°C, T P T P
ENABLE
TIMEOUT
IN
OUT
A
A
J
+150°C, unless otherwise noted. Typical values are T = +25°C.) (Note 2)
A
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
SETOV INPUT (TRI-MODE)
SET = HIGH, V
or SET = GND, V
= 5V
SETOV
SETOV Input Leakage Current
SETOV Low-Level Input Voltage
SETOV High-Level Input Voltage
1
FA
V
= 5V
SETOV
SET = GND, V
< V
or places
SETOV
ILSETOV
V
0.4
ILSETOV
device in +3.3V fixed output-voltage mode
SET = GND, V > V or places
V
- 0.4
SETOV
IHSETOV
OUT
V
V
IHSETOV
device in +5V fixed output-voltage mode
Note 2: Production tested at T = +25°C. Overtemperature limits are guaranteed by ATE characterization between -40°C P T
≤
A
J
+150°C, unless otherwise noted.
Note 3: Observe the absolute maximum power dissipation limits.
Note 4: Specification characterized up to +150°C operating junction temperature. Limits are guaranteed by bench characterization.
Note 5: Dropout voltage is defined as (V - V
) when V
is 2% below the value of V
for V = V
+ 3V.
IN
OUT
OUT
OUT
IN
OUT
Note 6: Not production tested.
Note 7: ENABLE is internally pulled to GND.
6
______________________________________________________________________________________
200mA, Automotive, Ultra-Low
Quiescent Current, Linear Regulator
Typical Operating Characteristics
(V = V = +14V, C = 1µF, C
= 4.7µF ceramic, T = +25°C, unless otherwise noted.)
A
IN
EN
IN
OUT
SUPPLY CURRENT
vs. SUPPLY VOLTAGE
GROUND CURRENT
vs. LOAD CURRENT
SHUTDOWN SUPPLY CURRENT
vs. SUPPLY VOLTAGE
30
27
24
21
18
15
80
10
8
I
= 0
V
= 3.3V
OUT
LOAD
60
40
20
0
T
= -40NC
A
6
T
A
= +125NC
T
= +25NC
A
4
2
0
0
5
10
15
(V)
20
25
30
0
20 40 60 80 100 120 140 160 180 200
(mA)
0
5
10
15
(V)
20
25
30
V
I
V
IN
LOAD
IN
SHUTDOWN SUPPLY CURRENT
vs. TEMPERATURE
RESET THRESHOLD
vs. TEMPERATURE
DROPOUT VOLTAGE vs. LOAD CURRENT
(5V OUTPUT)
10
8
5.5
5.2
4.9
4.6
4.3
4.0
0.50
0.45
0.40
0.35
0.30
0.25
0.20
0.15
0.10
0.05
0
T
= +150NC
A
V
= 5V
OUT
T
= +125NC
A
MAX16910_9/V RISING
T
= +25NC
A
6
MAX16910_9/V FALLING
V
V
= 30V
IN
IN
T
A
= -40NC
4
MAX16910_8/V RISING
= 14V
= 6V
2
MAX16910_8/V FALLING
V
IN
0
-50 -25
0
25 50 75 100 125 150
-50 -25
0
25 50 75 100 125 150
0
20 40 60 80 100 120 140 160 180 200
LOAD CURRENT (mA)
TEMPERATURE (NC)
TEMPERATURE (NC)
_______________________________________________________________________________________
7
200mA, Automotive, Ultra-Low
Quiescent Current, Linear Regulator
Typical Operating Characteristics (continued)
(V = V = +14V, C = 1µF, C
= 4.7µF ceramic, T = +25°C, unless otherwise noted.)
A
IN
EN
IN
OUT
DROPOUT VOLTAGE vs. LOAD CURRENT
(3.3V OUTPUT)
OUTPUT VOLTAGE vs.
SUPPLY VOLTAGE
OUTPUT VOLTAGE vs.
SUPPLY VOLTAGE
0.50
5.5
5.0
4.5
4.0
3.5
3.0
2.5
2.0
1.5
1.0
0.5
0
3.5
3.0
2.5
2.0
1.5
1.0
0.5
0
T
= +150NC
A
0.45
0.40
0.35
0.30
0.25
0.20
0.15
0.10
0.05
0
T
= +125NC
A
T
= +25NC
A
T
A
= -40NC
I
= 0mA
LOAD
I
= 0mA
LOAD
SETOV = OUT
SET = GND
SETOV = GND
SET = GND
0
20 40 60 80 100 120 140 160 180 200
LOAD CURRENT (mA)
0
5
10 15 20 25 30 35 40
0
5
10 15 20 25 30 35 40
V
(V)
V
(V)
IN
IN
RESET TIMEOUT PERIOD vs.
TEMPERATURE
POWER-SUPPLY REJECTION RATIO
vs. FREQUENCY
OUTPUT VOLTAGE
vs. TEMPERATURE
60
55
50
45
40
35
30
25
20
0
-10
-20
-30
-40
-50
-60
-70
5.05
5.04
5.03
5.02
5.01
5.00
4.99
4.98
4.97
4.96
4.95
I
= 10mA
C
UNCONNECTED
OUT
TIMEOUT
I
= 10mA
LOAD
V
= 14V + 0.5V
IN
P-P
-50 -25
0
25 50 75 100 125 150
0.01
0.1
1
10
100
1000
-40
0
40
80
120
TEMPERATURE (NC)
FREQUENCY (kHz)
TEMPERATURE (°C)
8
______________________________________________________________________________________
200mA, Automotive, Ultra-Low
Quiescent Current, Linear Regulator
Typical Operating Characteristics (continued)
(V = V = +14V, C = 1µF, C
= 4.7µF ceramic, T = +25°C, unless otherwise noted.)
A
IN
EN
IN
OUT
RESET OUTPUT VOLTAGE
vs. SINK CURRENT
RESET TIMEOUT PERIOD vs.
TIMEOUT CAPACITANCE
1000
100
10
1.5
1.2
0.9
0.6
0.3
0
1
0.1
0.01
0.1
1
10
100
0.001
0.01
0.1
1
10
C
(nF)
RESET SINK CURRENT (mA)
TIMEOUT
LOAD-TRANSIENT RESPONSE
(3V OUTPUT)
LINE-TRANSIENT RESPONSE
(5V OUTPUT)
LOAD-TRANSIENT RESPONSE
(5V OUTPUT)
MAX16910 toc16
MAX16910 toc17
MAX16910 toc15
V
OUT
V
OUT
V
OUT
(AC-COUPLED)
100mV/div
(AC-COUPLED)
200mV/div
(AC-COUPLED)
100mV/div
28V
180mA
180mA
V
IN
I
I
OUT
OUT
6V
10mA
10mA
200Fs/div
2ms/div
200Fs/div
LINE-TRANSIENT RESPONSE
(3.3V OUTPUT)
POWER-UP RESPONSE
POWER-UP RESPONSE
MAX16910 toc18
MAX16910 toc19
MAX16910 toc20
14V
IN
I
V
= 0A
OUT
V
= V
IN
EN
14V
0V
V
IN
V
OUT
(AC-COUPLED)
200mV/div
0V
3.3V
V
OUT
3.3V
28V
0V
V
OUT
V
IN
170mA
I
OUT
4.8V
I
V
= 170mA
OUT
0V
0A
= V
IN
EN
2ms/div
40Fs/div
40Fs/div
_______________________________________________________________________________________
9
200mA, Automotive, Ultra-Low
Quiescent Current, Linear Regulator
Typical Operating Characteristics (continued)
(V = V = +14V, C = 1µF, C
= 4.7µF ceramic, T = +25°C, unless otherwise noted.)
IN
EN
IN
OUT
A
ENABLE STARTUP RESPONSE
ENABLE STARTUP RESPONSE
LOAD-DUMP TRANSIENT RESPONSE
MAX16910 toc21
MAX16910 toc22
MAX16910 toc23
5V
V
EN
5V
V
0V
3.3V
V
OUT
IN
(AC-COUPLED)
100mV/div
V
OUT
0V
0V
3.3V
42V
V
OUT
175mA
V
IN
0A
I
OUT
14V
0A
40Fs/div
40Fs/div
100ms/div
Pin Description
PIN
NAME
FUNCTION
1
IN
Regulator Input. Bypass IN to GND with a 1FF (min) low-ESR ceramic capacitor.
Active-High Enable Input. Force ENABLE high (or connect to IN) to turn the regulator on. Pull
ENABLE low (or leave unconnected) to place the device in a low-power shutdown mode. ENABLE
is internally pulled down to GND through a 0.65FA current sink.
2
3
ENABLE
Feedback Network Selector. Connect SET to GND when operating the MAX16910 in fixed output-
voltage mode (3.3V or 5V) using the internal feedback network. Connect SET to IN or any voltage
higher than 2.4V when an external feedback network (resistive divider) is used, operating the
MAX16910 in adjustable output-voltage mode.
SET
Active-Low, Open-Drain Reset Output. RESET asserts low when OUT is below the reset threshold,
and remains low for the duration of the reset timeout period after the reset conditions end. RESET
also asserts low when ENABLE is low and during thermal shutdown.
RESET
4
5
Reset-Timeout-Period Adjust Input. Internal capacitance produces a 60Fs default delay when
TIMEOUT is left unconnected. Connect a capacitor from TIMEOUT to GND to set a longer timeout
period than default.
TIMEOUT
Regulated Output-Voltage Selector. Connect SETOV to OUT for a 5V fixed output, or connect
SETOV to GND for a 3.3V fixed output. SETOV becomes the feedback path when using an exter-
nal resistive divider for an adjustable output.
6
7
SETOV
GND
Ground
Regulator Output. Bypass OUT to GND with a minimum of 4.7FF. Use a low-ESR, ceramic capaci-
tor (X7R, X5R) for optimal performance. The SETOV input controls the output voltage when in fixed
+3.3V or fixed +5V output-voltage mode. Using an external resistive divider between OUT and
SETOV sets adjustable output voltage from +1.5V to +11V.
8
OUT
EP
Exposed Pad. EP is internally connected to GND. Connect EP to the ground plane to provide a
low thermal-resistance path from the thermal junction to the PCB. Do not use EP as the only elec-
trical connection to GND.
—
10 _____________________________________________________________________________________
200mA, Automotive, Ultra-Low
Quiescent Current, Linear Regulator
Functional Diagram
OUT
IN
OVERCURRENT
PROTECTION
CONTROL
LOGIC
ENABLE
THERMAL
PROTECTION
SET
OUTPUT-
VOLTAGE
SELECT MUX
SETOV
1.253V
RESET
TIMEOUT
RESET
1.156V (92.5%)
or
1.094V (87.5%)
TIMEOUT
MAX16910
GND
Fixed Output-Voltage Mode
The SET and SETOV inputs determine the output mode.
For the 5V fixed output-voltage mode (see the 5V fixed
output circuit in the Typical Operating Circuits), con-
nect SET to GND and SETOV to OUT. For the 3.3V fixed
output-voltage mode (see the 3.3V fixed output circuit
in the Typical Operating Circuits) connect SET to GND
and SETOV to GND.
_______________Detailed Description
The MAX16910 low-quiescent current, high-voltage lin-
ear regulator is ideal for use in automotive and battery-
operated systems. The device operates from an input
voltage of +3.5V to +30V, delivers up to 200mA of load
current, and consumes only 20µA of quiescent current
at no load. The input is +45V tolerant and is designed
to operate under load-dump conditions. The MAX16910
can be user configured as either a fixed output voltage
(+3.3V or +5V) or an adjustable output voltage using an
external resistive divider.
Adjustable Output-Voltage Mode
For the adjustable output-voltage mode (see the adjust-
able output circuit in the Typical Operating Circuits),
connect SET to IN or a voltage > 2.4V and connect
SETOV to a resistive divider R1 and R2 between OUT
and GND. An output voltage between 1.5V and 11V can
be selected using the following equation:
The MAX16910 features an open-drain, active-low
RESET output with fixed thresholds offered at 92.5%
and 87.5% of the output voltage. The RESET output
remains low for a fixed period of 60µs after the output
voltage exceeds its threshold. The RESET delay can be
extended with an external capacitor. The MAX16910
includes an enable input short-circuit protection and
thermal shutdown.
V
OUT
= V
x (1 + R1/R2)
SETOV
where V
= 1.25V and R2 should be less than or
SETOV
equal to 100kω.
______________________________________________________________________________________ 11
200mA, Automotive, Ultra-Low
Quiescent Current, Linear Regulator
where C
in ms.
is in nF, I is in µA, and T
is
ENABLE
ENABLE is an active-high, logic-level enable input that
turns the device on or off. Drive ENABLE high to turn
the device on. An internal 0.65µA pulldown current
keeps the MAX16910 in shutdown mode when driven
by a three-state driver in high-impedance mode, or an
open-drain driver. When in shutdown, the MAX16910
consumes only 1.6µA. ENABLE withstands voltages up
to 45V, allowing it to be driven by high-input level volt-
ages or connected to IN for always-on operation.
TIMEOUT
TO
TIMEOUT
For example, if I is 1µA, C
TO
get a 10ms delay.
needs to be 8nF to
TIMEOUT
___________Applications Information
Output-Capacitor Selection and
Regulator Stability
For stable operation over the full temperature range,
with fixed 3.3V and 5.0V output voltages, use a low-ESR
4.7µF capacitor. For resistor-programmed output voltag-
es, a 10µF low-ESR ceramic capacitor is recommended
for stable operation. Use larger output-capacitor values
such as 22µF to reduce noise, improve load-transient
response and power-supply rejection. Some ceramic
dielectrics exhibit large capacitance and ESR variations
with temperature. To improve power-supply rejection
and transient response, use a capacitor larger than the
minimum 1µF capacitor between IN and GND.
Thermal Protection
The MAX16910 features thermal protection. When the
junction temperature exceeds +180°C, an internal ther-
mal sensor turns off the pass transistor, and allows the
device to cool. The thermal sensor turns on the pass
transistor again after the junction temperature cools by
25°C. This results in a cycled output during continuous
thermal-overload conditions. Thermal protection protects
the MAX16910 in the event of fault conditions. For con-
tinuous operation, do not exceed the absolute maximum
junction temperature rating of +150°C.
Available Output-Current Calculation
The MAX16910 provides up to 200mA of continuous
output current. The input voltage range extends to
30V. Package power dissipation limits the amount of
output current available for a given input/output voltage
and ambient temperature. Figure 1 shows the maxi-
mum allowable power dissipation for these devices to
keep the junction temperature below +150°C. Figure 1
assumes that the exposed metal pad of the MAX16910 is
soldered to a 1in2 of multilayer copper board. Use Figure
1 to determine the allowable package dissipation for a
given ambient temperature. Alternately, use the following
Output Short-Circuit Current Limit
The MAX16910 features a 330mA current limit. The out-
put can be shorted to GND continuously without dam-
age to the device. During a short circuit, the power dis-
sipated across the pass transistor can quickly heat the
device. When the die temperature reaches +180°C, the
MAX16910 turns off the pass transistor and automatically
restarts after the die temperature has cooled by 25°C.
RESET Output
The MAX16910 features an active-low, open-drain reset
output. Once the monitored output voltage exceeds the
reset threshold voltage, RESET remains low for the reset
timeout period and then goes high. RESET changes from
high to low whenever the monitored output voltage drops
below the reset threshold voltage. RESET also asserts
low when ENABLE is low and during thermal shutdown.
formulas to calculate the allowable power dissipation P .
D
For the TDFN-EP package:
1.951W for T
≤ +70°C
A
P
=
W
D
1.951W − 0.0244
×
T
− 70°C for + 70°C
≤
T
< +125°C
(
)
A
A
°C
Timeout
The MAX16910 features a reset timeout period adjustable
input. The internal capacitance produces a 60µs default
delay when TIMEOUT is left unconnected. Connect a
capacitor from TIMEOUT to GND to set a higher timeout
period than default. Use the following formula to deter-
mine the reset timeout capacitor:
For the SO-EP package:
1.861W for T
≤ +70°C
A
P
=
W
D
1.861W − 0.0233 × T − 70°C for + 70°C
≤
T
< +125°C
A
(
)
A
°C
C
= 0.8 x I x T
TO TIMEOUT
TIMEOUT
12 _____________________________________________________________________________________
200mA, Automotive, Ultra-Low
Quiescent Current, Linear Regulator
After determining the allowable power dissipation, cal-
Selecting Timeout Capacitor
The reset timeout period is adjustable to accommodate
a variety of microprocessor applications. Adjust the
reset timeout period by connecting a capacitor between
TIMEOUT and GND.
culate the maximum allowable output current, without
exceeding the +150°C junction temperature, using the
following formula:
PD
IOUT(MAX)
=
1.25 × C
VIN − VOUT
TIMEOUT
tRP
=
ITO
The above equations do not include the negligible power
dissipation from self-heating due to the device ground
current.
where t is in ms and C
is in nF.
RP
TIMEOUT
Leave TIMEOUT unconnected to select the internally
fixed timeout period. C must be a low-leakage
Example 1 (TDFN-EP Package):
TIMEOUT
(< 10nA) type capacitor. Ceramic capacitors are recom-
mended; do not use capacitor values lower than 100pF
to avoid the influence of parasitic capacitances.
T = +125°C, V = 16V, V = 3.3V
OUT
A
IN
Calculate the maximum allowable power dissipation at
the given temperature as follows:
Exposed Pad
The MAX16910 package features an exposed thermal
pad on its underside that should be used as a heatsink.
This pad lowers the package’s thermal resistance by
providing a direct heat-conduction path from the die
to the PCB. Connect the exposed pad and GND to the
system ground using a large pad or ground plane, or
multiple vias to the ground plane layer.
W
°C
PD = 1.951W − 0.0244 × 125°C − 70°C = 609mW
(
)
And establish the maximum output current:
609mW
IOUT(MAX)
=
≅ 48mA
16V − 3.3V
Example 2 (TDFN-EP Package):
T = +50°C, V = 9V, V = 5V
2.4
A
IN
OUT
1.951W
2.2
8-PIN TDFN-EP
Calculate the maximum allowable power dissipation at
the given temperature as follows:
2.0
1.8
1.861W
1.6
P
= 1.951W
D
DERATE
8-PIN SO-EP
Find the maximum output current:
1.4
1.2
1.0
0.8
0.6
0.4
0.2
0
24.4mW/°C
1.951W
9V − 5V
DERATE
I
=
= 488mA ⇒ I
= I
= 330mA (typ)
SC
OUT(MAX)
OUT(MAX)
23.3mW/°C
In Example 2, the maximum output current is calculated
as 488mA. The allowable output current cannot exceed
the given internal current limit for the device of 330mA
(typ).
0
20
40
60
80
100 120 140
TEMPERATURE (°C)
Figure 1. Calculated Maximum Power Dissipation vs. Ambient
Temperature
______________________________________________________________________________________ 13
200mA, Automotive, Ultra-Low
Quiescent Current, Linear Regulator
Ordering Information/Selector Guide
PART
RESET THRESHOLD
PIN-PACKAGE
TOP MARK
8 TDFN-EP*
(3mm x 3mm)
MAX16910CATA8/V+
87.5
+BLW
8 TDFN-EP*
(3mm x 3mm)
MAX16910CATA9/V+
MAX16910CASA8/V+
MAX16910CASA9/V+
MAX16910CATA8+
MAX16910CATA9+
MAX16910CASA8+
MAX16910CASA9+
92.5
87.5
92.5
87.5
92.5
87.5
92.5
+BLV
—
8 SO-EP*
(5mm x 4mm)
8 SO-EP*
(5mm x 4mm)
—
8 TDFN-EP*
(3mm x 3mm)
+BOW
+BOV
—
8 TDFN-EP*
(3mm x 3mm)
8 SO-EP*
(5mm x 4mm)
8 SO-EP*
(5mm x 4mm)
—
+Denotes a lead(Pb)-free/RoHS-compliant package.
/V denotes an automotive qualified part.
*EP = Exposed pad.
__________________________Chip Information
PROCESS: BiCMOS DMOS
Package Information
For the latest package outline information and land patterns,
go to www.maxim-ic.com/packages. Note that a “+”, “#”, or
“-” in the package code indicates RoHS status only. Package
drawings may show a different suffix character, but the drawing
pertains to the package regardless of RoHS status.
PACKAGE
TYPE
PACKAGE
CODE
OUTLINE
NO.
LAND
PATTERN NO.
8 TDFN-EP
8 SO-EP
T833+2
S8E+12
21-0137
21-0111
90-0059
90-0150
14 _____________________________________________________________________________________
200mA, Automotive, Ultra-Low
Quiescent Current, Linear Regulator
Revision History
REVISION REVISION
PAGES
DESCRIPTION
CHANGED
NUMBER
DATE
0
7/09
Initial release
—
Added a junction temperature range of -40°C to +150°C in the Features section,
updated Electrical Characteristics table with +150°C junction temperature in “5V
Output Voltage,” “3.3V Output Voltage,” and “Dropout Voltage” parameters, added
new Note 4, updated TOC 10 and Figure 1
1
10/10
1, 4, 5, 6, 8, 13
Removed the typ value from the “Dropout Voltage” I
Electrical Characteristics table
= 50mA parameter in the
LOAD
2
3
7/11
4/12
4
Added consumer-grade products to data sheet
1,14
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. The parametric values (min and max limits) shown in the Electrical
Characteristics table are guaranteed. Other parametric values quoted in this data sheet are provided for guidance.
Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600
15
©
2012 Maxim Integrated Products
Maxim is a registered trademark of Maxim Integrated Products, Inc.
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