MAX6338FUB+ [MAXIM]
Power Supply Support Circuit, Adjustable, 4 Channel, BICMOS, PDSO10, LEAD FREE, MO-187C-BA, USOP-10;
| 型号： | MAX6338FUB+ |
| 厂家： | 
MAXIM INTEGRATED PRODUCTS |
| 描述： | Power Supply Support Circuit, Adjustable, 4 Channel, BICMOS, PDSO10, LEAD FREE, MO-187C-BA, USOP-10 信息通信管理 光电二极管 |
| 文件： | 总8页 (文件大小：568K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
19-1695; Rev 2; 12/05
Quad Voltage Monitor in µMAX Package
General Description
Features
The MAX6338 quad voltage monitor is capable of moni-
toring up to four supplies without any external compo-
nents. A variety of factory-trimmed threshold voltages
and supply tolerances are available to optimize the
MAX6338 for specific applications. The selection
includes input options for monitoring +5.0V, +3.3V,
+3.0V, +2.5V, +1.8V, and -5.0V voltages. An additional
high-input impedance comparator option can be used
as an adjustable voltage monitor, general-purpose com-
parator, or digital level translator.
♦ Monitors Four Voltages (Factory Programmed or
User Adjustable)
+5.0V, +3.3V, +3.0V, +2.5V, +1.8V, -5.0V
(nominal) or User-Adjustable Settings
♦ Low 25µA Supply Current
♦ Four Independent, Open-Drain, Active-Low
Outputs
♦ +2.5V to +5.5V Supply Voltage Range
♦ Guaranteed from -40°C to +85°C
♦ No External Components Required
♦ Small 10-Pin µMAX Package
Each of the monitored voltages is available with trip
thresholds to support power-supply tolerances of either
5% or 10% below the nominal voltage. An internal
bandgap reference ensures accurate trip thresholds
across the extended (-40°C to +85°C) operating temper-
ature range.
Ordering Information
PART
TEMP RANGE
PIN-PACKAGE
The MAX6338 consumes 25µA (typ) supply current and
operates with supply voltages from +2.5V to +5.5V. An
internal undervoltage lockout circuit forces all four digital
MAX6338_UB*
-40°C to +85°C
10 µMAX
*Insert the desired letter from the Selector Guide into the blank
to complete the part number.
outputs low when V
drops below the minimum operat-
CC
Devices are available in both leaded and lead-free packaging.
Specify lead free by adding the + symbol at the end of the part
number when ordering.
ing voltage. The four digital outputs all have weak inter-
nal pull-ups to V , allowing wire-ORed connection.
CC
Each input threshold voltage has an independent output.
The MAX6338 is available in a 10-pin µMAX® package.
Selector Guide
NOMINAL INPUT VOLTAGE
SUPPLY
TOLERANCE
(%)
________________________Applications
IN1
(V)
IN2
(V)
IN3
(V)
IN4
(V)
PART
Telecommunications
High-End Printers
MAX6338AUB
MAX6338BUB
MAX6338CUB
MAX6338DUB
MAX6338EUB
MAX6338FUB
MAX6338GUB
MAX6338HUB
MAX6338IUB
MAX6338JUB
MAX6338KUB
MAX6338LUB
MAX6338MUB
MAX6338NUB
MAX6338OUB
MAX6338PUB
5
5
3.3
3.3
3.3
3.3
3.0
3.0
3.0
3.0
3.3
3.3
3.3
3.3
3.0
3.0
3.3
3.3
2.5
Adj*
10
5
Desktop and Notebook Computers
Data Storage Equipment
Networking Equipment
Industrial Equipment
Set-Top Boxes
2.5† Adj*
1.8 Adj*
1.8† Adj*
2.5 Adj*
2.5† Adj*
1.8 Adj*
1.8† Adj*
2.5 1.8
2.5† 1.8†
2.5 Adj*
2.5† Adj*
5
10
5
5
5
10
5
5
5
10
5
5
Pin Configuration
5
10
5
TOP VIEW
5
Adj*
Adj*
5
10
5
IN1
IN2
1
2
3
4
5
10
9
V
CC
OUT1
OUT2
OUT3
OUT4
Adj*
Adj*
Adj*
Adj*
-5
-5
-5
-5
10
5
MAX6338
IN3
8
5
IN4
7
5
10
5
GND
6
5
*Adjustable voltage based on +1.23V internal threshold. External
threshold voltage can be set using an external resistor-divider.
† Nominal input voltages for 1.8V and 2.5V are specified for 10%
tolerances
µMAX
µMAX is a registered trademark of Maxim Integrated Products, Inc.
________________________________________________________________ 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.
Quad Voltage Monitor in µMAX Package
ABSOLUTE MAXIMUM RATINGS
Terminal Voltage (with respect to GND)
Continuous Power Dissipation (T = +70°C)
A
V
......................................................................-0.3V to +6V
10-pin µMAX (derate 5.6mW/°C above +70°C)..........444mW
Operating Temperature Range ...........................-40°C to +85°C
Storage Temperature Range.............................-65°C to +150°C
Junction Temperature......................................................+150°C
Lead Temperature (soldering, 10s) .................................+300°C
CC
Output Voltages (OUT_)...........................................-0.3V to +6V
Input Voltages (IN_) (except -5V).............................-0.3V to +6V
Input Voltage (-5V input) ..........................................-6V to +0.3V
Continuous OUT_ Current...................................................20mA
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
= +2.5V to +5.5V, T = -40°C to +85°C, unless otherwise noted. Typical values are at T = +25°C and V
= +5V, unless other-
CC
A
A
CC
wise noted.) (Note 1)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
+5.5
50
UNITS
Supply Voltage Range
Supply Current
V
+2.5
V
CC
V
V
= +3V
= +5V
25
35
CC
CC
I
µA
CC
65
V
= input threshold voltage
IN_
25
40
+0.1
-20
(+1.8V, +2.5V, +3.0V, +3.3V, +5.0V)
V
= 0 to V
IN_
CC
Input Current (Note 2)
I
-0.1
µA
IN_
(input threshold voltage =1.23V)
V
= -5V
IN_
-10
(input threshold voltage = -5V)
+5.0V (-5%) Threshold
+5.0V (-10%) Threshold
+3.3V (-5%) Threshold
+3.3V (-10%) Threshold
+3.0V (-5%) Threshold
+3.0V (-10%) Threshold
+2.5V (-10%) Threshold
+1.8V (-10%) Threshold
-5.0V (+5%) Threshold
-5.0V (+10%) Threshold
Adjustable Threshold
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
decreasing
decreasing
decreasing
decreasing
decreasing
decreasing
decreasing
decreasing
increasing
increasing
decreasing
4.5
4.25
3.0
4.63
4.38
3.08
2.93
2.78
2.63
2.19
1.58
-4.63
-4.38
1.23
4.75
4.50
3.15
3.00
2.85
2.70
2.25
1.62
-4.50
-4.25
1.26
V
V
V
V
V
V
V
V
V
V
V
TH
TH
TH
TH
TH
TH
TH
TH
TH
TH
TH
IN
IN
IN
IN
IN
IN
IN
IN
IN
IN
IN
2.85
2.7
2.55
2.13
1.53
-4.75
-4.5
1.20
Threshold Voltage Temperature
Coefficient
60
0.3
20
ppm/°C
Threshold Hysteresis
V
%
THYST
V
V
= V to (V - 50mV) or
TH TH
IN_
TH
Propagation Delay
t
µs
pd
to (V - 50mV)
TH
V
V
V
V
= 5V, I
= 2mA
0.4
0.4
0.4
CC
CC
CC
CC
SINK
Output Low Voltage
Output High Voltage
V
V
V
= 2.5V, I
= 1.2mA
OL
SINK
= 1V, I
= 50µA
SINK
V
> 2.5V, I
= 6µA (minimum)
0.8 x V
CC
OH
SOURCE
Note 1: 100% production tested at +25°C. Overtemperature limits guaranteed by design.
Note 2: Guaranteed by design.
2
_______________________________________________________________________________________
Quad Voltage Monitor in µMAX Package
Typical Operating Characteristics
(V
= +5V, T = +25°C, unless otherwise noted.)
A
CC
NORMALIZED THRESHOLD ERROR
vs. SUPPLY VOLTAGE
SUPPLY CURRENT
vs. SUPPLY VOLTAGE
NORMALIZE THRESHOLD
vs. TEMPERATURE
0.10
0.08
0.06
0.04
0.02
0
45
40
35
30
25
20
15
10
0.1
0
V
= +5V
CC
T
= +25°C
A
T
= +85°C
A
-0.1
-0.2
-0.3
T
= -40°C
A
-0.02
-0.04
-0.06
NORMALIZED TO +5V
2.5
3.0
3.5
4.0
4.5
5.0
5.5
60
2.5
3.0
3.5
4.0
4.5
5.0
5.5
-40
-20
0
20
40
80
SUPPLY VOLTAGE (V)
SUPPLY VOLTAGE (V)
TEMPERATURE (°C)
OUTPUT-VOLTAGE LOW
vs. SINK CURRENT
PROPAGATION DELAY
(WITH 100mV OVERDRIVE)
PROPAGATION DELAY
(WITH 20mV OVERDRIVE)
0.6
0.5
0.4
0.3
0.2
0.1
0
V
= 5V
CC
IN_
50mV/div
IN_
20mV/div
T
= +25°C
A
T
= +85°C
A
OUT_
2V/div
OUT_
2V/div
T
= -40°C
A
0
1
2
3
4
5
6
7
8
9
10
10µs/div
10µs/div
SINK CURRENT (mA)
_______________________________________________________________________________________
3
Quad Voltage Monitor in µMAX Package
Pin Description
PIN
NAME
FUNCTION
1
IN1
Input Voltage 1. See the Selector Guide for monitored voltages.
2
3
4
5
IN2
IN3
Input Voltage 2. See the Selector Guide for monitored voltages.
Input Voltage 3. See the Selector Guide for monitored voltages.
Input Voltage 4. See the Selector Guide for monitored voltages.
Ground
IN4
GND
Output 4. OUT4 goes low when V
falls below its absolute threshold. OUT4 is open drain with a 10µA
falls below its absolute threshold. OUT3 is open drain with a 10µA
falls below its absolute threshold. OUT2 is open drain with a 10µA
falls below its absolute threshold. OUT1 is open drain with a 10µA
IN4
IN3
IN2
IN1
6
7
OUT4
OUT3
OUT2
OUT1
internal pullup to V
.
CC
Output 3. OUT3 goes low when V
internal pullup to V
.
CC
Output 2. OUT2 goes low when V
internal pullup to V
8
.
CC
Output 1. OUT1 goes low when V
internal pullup to V
9
.
CC
Power Supply. Connect V
to a +2.5V to +5.5V supply. An undervoltage lockout circuit forces all OUT_
CC
10
V
CC
pins low when V
drops below 2.5V.
CC
tors is connected to a 1.23V bandgap reference for all
positive voltages. The noninverting terminals are acces-
sible through internal resistive voltage-dividers with
preset factory threshold voltages. In the case of auxil-
iary (AUX) input, the positive terminal of the comparator
is accessible directly for setting the threshold for the
monitored voltage.
_______________Detailed Description
The MAX6338 is a low-power (25µA), quad voltage
monitor designed for multivoltage systems. Preset volt-
age options for +5.0V, +3.3V, +3.0V, +2.5V, +1.8V, and
-5.0V make these quad monitors ideal for applications
such as telecommunications, desktop and notebook
computers, high-end printers, data storage equipment,
and networking equipment.
When any of the inputs (IN1–IN4) are higher than the
threshold level, the output is high. The output goes low
as the input drops below the threshold voltage monitor.
The undervoltage lockout circuitry remains active and
The MAX6338 has an internally trimmed threshold that
minimizes or eliminates the need for external compo-
nents. The four open-drain outputs have weak (10µA)
the outputs remain low with V
down to 1V (Figure 1).
CC
internal pullups to V , allowing them to interface easily
CC
with other logic devices. The MAX6338 can monitor
power supplies with either 5% or 10% tolerance specifi-
cations, depending on the selected version. An addi-
tional high-input-impedance comparator option can be
used as an adjustable voltage monitor, general-pur-
pose comparator, or digital level translator.
Applications Information
Hysteresis
When the voltage on one comparator input is at or near
the voltage on the other input, ambient noise generally
causes the comparator output to oscillate. The most
common way to eliminate this problem is through hys-
teresis. When the two comparator input voltages are
equal, hysteresis causes one comparator input voltage
to move quickly past the other, thus taking the input out
of the region where oscillation occurs. Standard com-
parators require hysteresis to be added through the
use of external resistors. The external resistive network
usually provides a positive feedback to the input in
order to cause a jump in the threshold voltage when
The weak internal pullups can be overdriven by external
pullups to any voltage from 0 to +5.5V. Internal circuitry
prevents current flow from the external pullup voltage to
V
. The outputs can be wire-ORed for a single “power
CC
good” signal.
The MAX6338 has either one or two auxiliary inputs and
two or three factory-programmed threshold voltages, or
four fixed voltages. The inverting input of all compara-
4
_______________________________________________________________________________________
Quad Voltage Monitor in µMAX Package
V
CC
V
CC
V
CC
V
CC
MAX6338M/N/O/P
IN1
OUT1
OUT2
OUT3
OUT4
IN2
IN3*
(AUX)*
IN4
(-5V)
V
REF
REFERENCE
V
CC
UNDERVOLTAGE LOCKOUT
*SEE AUXILIARY INPUT SECTION.
Figure 1. Functional Diagram
_______________________________________________________________________________________
5
Quad Voltage Monitor in µMAX Package
+5V
+5V
0.1µF*
V
CC
IN1
IN2
V1
V2
MAX6338
V
D1
D2
D3
D4
CC
V
IN
(+5V)
IN1
IN2
IN3
IN4
OUT1
OUT2
OUT3
OUT4
V3
V4
IN3
IN4
MAX6338
OUT1
OUT2
OUT3
OUT4
GND
GND
*OPTIONAL
Figure 2. Quad Undervoltage Detector with LED Indicators
Figure 3. V
Bar Graph Monitoring
CC
+5V
R2
V
V
=
1 +
V
REF
TH1
( )
R1
OUT1
V
CC
R2
= 1.23V
REF
V
TH1
IN1
IN2
IN3
IN4
OUT1
OUT2
OUT3
OUT4
R1
MAX6338HUB
OUT1
INPUT
OUT4
OUT
V
TH4
R4
GND
R3
R4
R3
V
TH4
=
1 +
V
REF
( )
∆V
TH
Figure 4. Window Detection
Figure 5. Output Response of Window Detector Circuit
output toggles in one direction or the other. These
resistors are not required when using the MAX6338
because hysteresis is built into the device. MAX6338
hysteresis is typically 0.3%.
The MAX6338 can also be used in applications such as
system supervisory monitoring, multivoltage level
detection, and V
bar graph monitoring (Figure 3).
CC
Window Detection
Undervoltage Detection Circuit
The open-drain outputs of the MAX6338 can be config-
ured to detect an undervoltage condition. Figure 2
shows a configuration where a low at a comparator out-
put indicates an undervoltage condition, which in turn
causes an LED to light.
A window detector circuit uses two auxiliary inputs in a
configuration such as the one shown in Figure 4.
External resistors R1–R4 set the two threshold voltages
(V
and V
) of the window detector circuit. Window
TH4
TH1
width (∆V ) is the difference between the threshold
TH
voltages (Figure 5).
6
_______________________________________________________________________________________
Quad Voltage Monitor in µMAX Package
Unused Inputs
The unused inputs (except the auxiliary) are internally
connected to ground through the lower resistors of the
threshold-setting resistor pairs. The auxiliary (AUX)
input, however, must be connected to either ground or
V
INTH
R1
V
if unused.
CC
Power-Supply Bypassing and Grounding
The MAX6338 operates from a single +2.5V to +5.5V
supply. In noisy applications, connect a 0.1µF capaci-
R2
tor on the supply voltage line close to V
bypassing.
pin for
CC
V
REF
= 1.23V
Chip Information
V
1.23
INTH
R1 = R2
- 1
)
(
TRANSISTOR COUNT: 620
PROCESS: BiCMOS
Figure 6. Setting the Auxiliary Monitor
Auxiliary Input
The adjustable voltage monitor is comparable to an
internal reference of 1.23V as shown in Figure 6. To set
the desired trip level of monitored supply, V
,
INTH
choose: R1 = R2 [(V
/ 1.23) - 1)]. For example, for a
INTH
voltage detection at 4.5V (assume R2 = 100kΩ), R1 =
265kΩ.
Typical Operating Circuit
+2.5V TO +5.5V
(MAY BE ONE OF THE MONITORED VOLTAGES)
V
CC
MAX6338
IN1
IN2
IN3
IN4
OUT1
OUT2
OUT3
OUT4
SUPPLIES
TO BE
MONITORED
SYSTEM
LOGIC
µP
GND
_______________________________________________________________________________________
7
Quad Voltage Monitor in µMAX Package
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.)
e
4X S
10
10
INCHES
MAX
MILLIMETERS
MAX
1.10
0.15
0.95
3.05
3.00
3.05
3.00
5.05
0.70
DIM MIN
MIN
-
A
-
0.043
0.006
0.037
0.120
0.118
0.120
0.118
0.199
A1
A2
D1
D2
E1
E2
H
0.002
0.030
0.116
0.114
0.116
0.114
0.187
0.05
0.75
2.95
2.89
2.95
2.89
4.75
0.40
H
Ø0.50 0.1
0.6 0.1
L
0.0157 0.0275
0.037 REF
L1
b
0.940 REF
0.007
0.0106
0.177
0.270
0.200
1
1
e
0.0197 BSC
0.500 BSC
0.6 0.1
c
0.0035 0.0078
0.0196 REF
0.090
BOTTOM VIEW
0.498 REF
S
α
TOP VIEW
0°
6°
0°
6°
D2
E2
GAGE PLANE
A2
c
A
E1
b
L
α
A1
D1
L1
FRONT VIEW
SIDE VIEW
PROPRIETARY INFORMATION
TITLE:
PACKAGE OUTLINE, 10L uMAX/uSOP
APPROVAL
DOCUMENT CONTROL NO.
REV.
1
21-0061
1
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.
8 _____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600
© 2005 Maxim Integrated Products
Printed USA
is a registered trademark of Maxim Integrated Products, Inc.
相关型号：
MAX6338FUB-T
Power Supply Support Circuit, Adjustable, 4 Channel, BICMOS, PDSO10, MO-187C-BA, USOP-10
MAXIM
MAX6338GUB+T
Power Supply Support Circuit, Adjustable, 4 Channel, BICMOS, PDSO10, LEAD FREE, MO-187C-BA, USOP-10
MAXIM
MAX6338GUB-T
Power Supply Support Circuit, Adjustable, 4 Channel, BICMOS, PDSO10, MO-187C-BA, USOP-10
MAXIM
MAX6338HUB+
Power Supply Support Circuit, Adjustable, 4 Channel, BICMOS, PDSO10, LEAD FREE, MO-187C-BA, USOP-10
MAXIM
©2020 ICPDF网 联系我们和版权申明