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PDF MAX16910 Data sheet ( Hoja de datos )
| Número de pieza | MAX16910 | |
| Descripción | Linear Regulator | |
| Fabricantes | Maxim Integrated Products | |
| Logotipo |  |
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19-4816; Rev 0; 7/09
200mA, Automotive, Ultra-Low
Quiescent Current, Linear Regulator
General Description
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.
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. 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.
Automotive
Industrial
www.DataSheet4U.com
Telecom
Applications
Typical Operating Circuits
1µF
+ 14V
- BATTERY
5V FIXED OUTPUT
IN OUT
ENABLE
SETOV
MAX16910
SET RESET
4.7µF
GND
TIMEOUT
1nF
(1.25ms DELAY)
VCC
10kI
µC
RESET
I/O
Features
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
+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)
S Thermal and Short-Circuit Protection
S Operating -40°C to +125°C Temperature Range
S Automotive Qualified
Ordering Information
PART
IOUT
(mA)
TEMP
RANGE
PIN-
PACKAGE
MAX16910CATA_/V+ 200
-40NC to
+125NC
8 TDFN-EP*
(3mm x 3mm)
MAX16910CASA_/V+ 200
-40NC to
+125NC
8 SO-EP*
(5mm x 4mm)
Insert the desired suffix numbers (from the Selector Guide) into
the blank “_” to indicate reset threshold.
+Denotes a lead(Pb)-free/RoHS-compliant package.
/V Denotes an automotive qualified part.
*EP = Exposed pad.
Typical Operating Circuits continued on next page.
________________________________________________________________ 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.
1 page  
200mA, Automotive, Ultra-Low
Quiescent Current, Linear Regulator
ELECTRICAL CHARACTERISTICS (continued)
(VIN = VENABLE = +14V, CTIMEOUT = open, CIN = 1μF, COUT = 4.7μF, unless otherwise noted. TA = TJ = -40°C to +125°C, unless
otherwise noted. Typical values are TA = +25°C.) (Note 2)
PARAMETER
Thermal Shutdown Hysteresis
Line Regulation
(5V Fixed Output Setting)
SYMBOL
(Note 5)
CONDITIONS
VIN = 6V to 30V, ILOAD = 1mA
MIN TYP MAX UNITS
+25 NC
1 mV
Line Regulation
(3.3V Fixed Output Setting)
VIN = 4.8V to 30V, ILOAD = 1mA
1 mV
Load Regulation
(5V Fixed Output Setting)
ILOAD = 1mA to 200mA
12 mV
Load Regulation
(3.3V Fixed Output Setting)
Power-Supply Rejection Ratio
Startup Response Time
TIMEOUT INPUT
TIMEOUT Ramp Current
TIMEOUT Ramp Delay
RESET Default Timeout Period
RESET OUTPUT
RESET Threshold
RESET Threshold Hysteresis
www.DataSOhUeeTt4toU.RcoEmSET Delay
RESET Output-Voltage Low
(Open-Drain)
PSRR
tSTART
ILOAD = 1mA to 200mA
ILOAD = 10mA, f = 100Hz, 500mVP-P
(Note 5)
Rising edge of VIN to VOUT, ILOAD = 50mA
(Note 5)
12
60
160
mV
dB
Fs
ITO TIMEOUT connected to GND
VOUT rising, TIMEOUT = OPEN
MAX16910__9/V+, VOUT falling
MAX16910__8/V+, VOUT falling
VOUT rising
VOUT falling (Note 5)
VOL ISINK = 0.5mA, RESET asserted
0.600
30
1.0
1.25
60
1.650
90
nA
ms/nF
Fs
90 92.5 94 % of
85 87.5 89 VOUT
5
% of
VOUT
4 Fs
0.4 V
RESET Open-Drain Leakage
Current
RESET Open-Drain Leakage
Current
ENABLE
ENABLE Logic-Low
ENABLE Logic-High
ENABLE Pulldown Current
SET INPUT
SET Input Current (All Modes)
SET Logic-Low
Set Logic-High
RESET not asserted, RESET = 7V,
TA = +25NC
RESET not asserted, RESET = 7V,
-40NC ≤ TA ≤ +125NC
VIL
VIH
(Note 6)
VILSET
VIHSET
TA = +25NC
TA = +125NC
0.03
1
FA
FA
0.4
2.4
0.65
-50 +50
0.2
0.4
2.4
V
V
FA
nA
FA
V
V
_______________________________________________________________________________________ 5
5 Page 
200mA, Automotive, Ultra-Low
Quiescent Current, Linear Regulator
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.
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.
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
www.DatarSehseteatr4tUs .acoftmer 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.
where CTIMEOUT is in nF, ITO is in μA, and TTIMEOUT is
in ms.
For example, if ITO is 1μA, CTIMEOUT needs to be 8nF to
get a 10ms delay.
___________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.
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
formulas to calculate the allowable power dissipation PD.
For the TDFN-EP package:
PD
=
1.951W
1.951W
for TA ≤ +70°C
− 0.0244°WC × ( TA
−
70°C)
for
+ 70°C
≤
TA < +125°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:
CTIMEOUT = 0.8 x ITO x TTIMEOUT
For the SO-EP package:
PD
=
1.861W
1.861W
for TA ≤ +70°C
− 0.0233°WC × (TA
−
70°C)
for
+ 70°C
≤
TA < +125°C
______________________________________________________________________________________ 11
11 Page | ||
| Páginas | Total 13 Páginas | |
| PDF Descargar | [ Datasheet MAX16910.PDF ] | |
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