|
|
PDF MAX6848 Data sheet ( Hoja de datos )
| Número de pieza | MAX6848 | |
| Descripción | Low-Power / Adjustable Battery Monitors with Hysteresis and Integrated UP Reset | |
| Fabricantes | Maxim Integrated | |
| Logotipo |  |
|
Hay una vista previa y un enlace de descarga de MAX6848 (archivo pdf) en la parte inferior de esta página. Total 12 Páginas | ||
|
No Preview Available !
19-2947; Rev 0; 7/03
Low-Power, Adjustable Battery Monitors with
Hysteresis and Integrated µP Reset
General Description
The MAX6846–MAX6849 are a family of ultra-low-power
battery monitors with integrated microprocessor (µP)
supervisors. The user-adjustable battery monitors are
offered with single or dual low-battery output options that
can be used to signal when the battery is OK (enabling
full system operation), when the battery is low (for low-
power system operation), and when the battery is dead
(to disable system operation). These devices also have
an independent µP supervisor that monitors VCC and
provides an active-low reset output. A manual reset
function is available to reset the µP with a pushbutton.
The MAX6846–MAX6849 are ideal for single-cell lithium-
ion (Li+) or multicell alkaline/NiCd/NiMH applications.
When the battery voltage drops below each adjusted low
threshold, the low-battery outputs are asserted to alert
the system. When the voltage rises above the adjusted
high thresholds, the outputs are deasserted after a
150ms minimum timeout period, ensuring the voltages
have stabilized before power circuitry is activated or pro-
viding microprocessor reset timing.
These devices have user-adjustable battery threshold
voltages, providing a wide hysteresis range to prevent
chattering that can result due to battery recovery after
load removal. Single low-battery outputs are supplied
by the MAX6846/MAX6847 and dual low-battery out-
puts are supplied by the MAX6848/MAX6849. All bat-
tery monitors have open-drain low-battery outputs.
The MAX6846–MAX6849 monitor system voltages
(VCC) from 1.8V to 3.3V with seven fixed reset threshold
options. Each device is offered with two minimum reset
timeout periods of 150ms or 1200ms. The MAX6846/
MAX6848 are offered with an open-drain RESET output
and the MAX6847/MAX6849 are offered with a push-
pull RESET output.
The MAX6846–MAX6849 are offered in a SOT23 pack-
age and are fully specified over a -40°C to +85°C temp-
erature range.
Applications
Battery-Powered Systems (Single-Cell Li+ or
Multicell NiMH, NiCd, Alkaline)
Cell Phones/Cordless Phones
Portable Medical Devices
Digital Cameras
Pagers
PDAs
MP3 Players
Electronic Toys
Features
o User-Adjustable Thresholds for Monitoring
Single-Cell Li+ or Multicell Alkaline/NiCd/NiMH
Applications
o Single and Dual Low-Battery Output Options
o Independent µP Reset with Manual Reset
o Factory-Set Reset Thresholds for Monitoring 1.8V
to 3.3V Systems
o Available with 150ms (min) or 1.2s (min) VCC
Reset Timeout Period Options
o 150ms (min) LBO Timeout Period
o Immune to Short-Battery Voltage Transients
o Low Current (2.5µA, typ at 3.6V)
o -40°C to +85°C Operating Temperature Range
o Small 8-Pin SOT23 Packages
Ordering Information
PART
TEMP RANGE PIN-PACKAGE
MAX6846KA_D_-T
-40°C to +85°C 8 SOT23-8
MAX6847KA_D_-T
-40°C to +85°C 8 SOT23-8
MAX6848KA_D_-T
-40°C to +85°C 8 SOT23-8
MAX6849KA_D_-T
-40°C to +85°C 8 SOT23-8
Note: The first “_” is the VCC reset threshold level, suffix found
in Table 1. The “_” after the D is a placeholder for the reset
timeout period suffix found in Table 2. All devices are available
in tape-and-reel only. There is a 2500 piece minimum order
increment for standard versions (see Standard Versions table).
Sample stock is typically held on standard versions only. Non-
standard versions require a minimum order increment of
10,000 pieces. Contact factory for availability.
Pin Configurations
TOP VIEW
VDD 1
GND 2
LTHIN 3
LBO 4
MAX6846
MAX6847
8 VCC
7 HTHIN
6 MR
5 RESET
VDD 1
GND 2
LTHIN 3
LBOL 4
MAX6848
MAX6849
8 VCC
7 HTHIN
6 LBOH
5 RESET
SOT23
SOT23
________________________________________________________________ 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.
1 page  
Low-Power, Adjustable Battery Monitors with
Hysteresis and Integrated µP Reset
Typical Operating Characteristics (continued)
(VDD = 3.6V, VCC = 3.3V, unless otherwise specified. Typical values are at TA = +25°C.)
NORMALIZED UPPER AND LOWER LBO TRIP
VOLTAGES vs. TEMPERATURE
1.050
NORMALIZED RESET THRESHOLD
vs. TEMPERATURE
1.050
1.025
1.025
1.000
1.000
0.975
0.975
0.950
-40 -20
0 20 40 60
TEMPERATURE (°C)
80
0.950
-40 -20
0 20 40 60
TEMPERATURE (°C)
80
LBO OUTPUT
vs. SINK CURRENT
120
VCC = VDD = 3.3V
100
80
60
40
20
0
02468
ISINK (mA)
10
RESET OUTPUT
vs. SINK CURRENT
140
VCC = 2.1V, VDD = 3.6V
120
100
80
60
40
20
0
02468
ISINK (mA)
10
RESET OUTPUT
vs. SOURCE CURRENT
3.50
VCC = 3.3V, VDD = 3.6V
3.25
3.00
2.75
2.50
0
0.5 1.0 1.5 2.0 2.5 3.0 3.5
ISOURCE (mA)
_______________________________________________________________________________________ 5
5 Page 
Low-Power, Adjustable Battery Monitors with
Hysteresis and Integrated µP Reset
PART
MAX6846
MAX6847
MAX6848
MAX6849
OPEN-DRAIN
RESET
X
—
X
—
PUSH-PULL RESET
—
X
—
X
Selector Guide
SINGLE LOW-
BATTERY OUTPUT
X
X
—
—
DUAL LOW-BATTERY
OUTPUT
—
—
X
X
Standard Versions Table
PART
MAX6846KARD3
MAX6846KASD3
MAX6846KAWD3
MAX6846KAZD3
MAX6847KARD3
MAX6847KASD3
MAX6847KAWD3
MAX6847KAZD3
MAX6848KARD3
MAX6848KASD3
MAX6848KAWD3
MAX6848KAZD3
MAX6849KARD3
MAX6849KASD3
MAX6849KAWD3
MAX6849KAZD3
TOP MARK
AEJI
AEJD
AEJK
AEJJ
AEJE
AEJL
AEJN
AEJM
AEJP
AEJO
AEJR
AEJQ
AEJT
AEJS
AEJV
AEJU
Typical Application Circuit
DC-DC
Li+
3.6V
VCC VCC
MR LBO NMI
VDD MAX6846
MAX6847
LTHIN
RESET
µP
RESET
HTHIN
GND
GND
Chip Information
TRANSISTOR COUNT: 1478
PROCESS: BiCMOS
______________________________________________________________________________________ 11
11 Page | ||
| Páginas | Total 12 Páginas | |
| PDF Descargar | [ Datasheet MAX6848.PDF ] | |
Hoja de datos destacado
| Número de pieza | Descripción | Fabricantes |
| MAX684 | 3.3V-Input to Regulated 5V-Output Charge Pumps | Maxim Integrated |
| MAX6840 | Ultra-Low-Voltage SC70 Voltage Detectors and uP Reset Circuits | Maxim Integrated |
| MAX6841 | (MAX6841 - MAX6845) Ultra-Low-Voltage uP Reset Circuits and Voltage Detectors |  Maxim Integrated Products |
| MAX6842 | (MAX6841 - MAX6845) Ultra-Low-Voltage uP Reset Circuits and Voltage Detectors | Maxim Integrated Products |
| Número de pieza | Descripción | Fabricantes |
| SLA6805M | High Voltage 3 phase Motor Driver IC. |
 Sanken |
| SDC1742 | 12- and 14-Bit Hybrid Synchro / Resolver-to-Digital Converters. |
 Analog Devices |
|
DataSheet.es es una pagina web que funciona como un repositorio de manuales o hoja de datos de muchos de los productos más populares, |
| DataSheet.es | 2020 | Privacy Policy | Contacto | Buscar |