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Battery Chargers. MAX1555 Datasheet

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Battery Chargers. MAX1555 Datasheet






MAX1555 Chargers. Datasheet pdf. Equivalent




MAX1555 Chargers. Datasheet pdf. Equivalent





Part

MAX1555

Description

SOT23 Dual-Input USB/AC Adapter 1-Cell Li+ Battery Chargers



Feature


MAX1551/MAX1555 SOT23 Dual-Input USB/AC Adapter 1-Cell Li+ Battery Chargers AVA ILAB LE General Description The MAX155 1/MAX1555 charge a single-cell lithium- ion (Li+) battery from both USB and AC adapter sources. They operate with no e xternal FETs or diodes, and accept oper ating input voltages up to 7V. On-chip thermal limiting simplifies PC board la yout and allows op.
Manufacture

MAXIM

Datasheet
Download MAX1555 Datasheet


MAXIM MAX1555

MAX1555; timum charging rate without the thermal limits imposed by worst-case battery an d input voltage. When the MAX1551/MAX15 55 thermal limits are reached, the char gers do not shut down, but progressivel y reduce charging current. The MAX1551 includes a POK output to indicate when input power is present. If either charg ing source is active, POK goes low. The MAX1555 instead f.


MAXIM MAX1555

eatures a CHG output to indicate chargin g status. With USB connected, but witho ut DC power, charge current is set to 1 00mA (max). This allows charging from b oth powered and unpowered USB hubs with no port communication required. When D C power is connected, charging current is set at 280mA (typ). No input-blockin g diodes are required to prevent batter y drain. The MAX15.


MAXIM MAX1555

51/MAX1555 are available in 5-pin thin S OT23 packages and operate over a -40°C to +85°C range. ♦ Charge from USB o r AC Adapter Features ♦ Automatic Sw itchover when AC Adapter is Plugged In ♦ On-Chip Thermal Limiting Simplifies Board Design ♦ Charge Status Indicat or ♦ 5-Pin Thin SOT23 Package Orderi ng Information PART MAX1551EZK-T MAX155 5EZK-T TEMP RANGE -40°C to +85.

Part

MAX1555

Description

SOT23 Dual-Input USB/AC Adapter 1-Cell Li+ Battery Chargers



Feature


MAX1551/MAX1555 SOT23 Dual-Input USB/AC Adapter 1-Cell Li+ Battery Chargers AVA ILAB LE General Description The MAX155 1/MAX1555 charge a single-cell lithium- ion (Li+) battery from both USB and AC adapter sources. They operate with no e xternal FETs or diodes, and accept oper ating input voltages up to 7V. On-chip thermal limiting simplifies PC board la yout and allows op.
Manufacture

MAXIM

Datasheet
Download MAX1555 Datasheet




 MAX1555
AVAILABLE
MAX1551/MAX1555
SOT23 Dual-Input USB/AC Adapter 1-Cell Li+
Battery Chargers
General Description
The MAX1551/MAX1555 charge a single-cell lithium-ion
(Li+) battery from both USB and AC adapter sources.
They operate with no external FETs or diodes, and
accept operating input voltages up to 7V.
On-chip thermal limiting simplifies PC board layout and
allows optimum charging rate without the thermal limits
imposed by worst-case battery and input voltage. When
the MAX1551/MAX1555 thermal limits are reached, the
chargers do not shut down, but progressively reduce
charging current.
The MAX1551 includes a POK output to indicate when
input power is present. If either charging source is
active, POK goes low. The MAX1555 instead features a
CHG output to indicate charging status.
With USB connected, but without DC power, charge cur-
rent is set to 100mA (max). This allows charging from
both powered and unpowered USB hubs with no port
communication required. When DC power is connected,
charging current is set at 280mA (typ). No input-blocking
diodes are required to prevent battery drain.
The MAX1551/MAX1555 are available in 5-pin thin SOT23
packages and operate over a -40°C to +85°C range.
Applications
PDAs
Wireless Appliances
Cell Phones Functional Diagrams
Digital Cameras
Features
Charge from USB or AC Adapter
Automatic Switchover when AC Adapter is
Plugged In
On-Chip Thermal Limiting Simplifies Board
Design
Charge Status Indicator
5-Pin Thin SOT23 Package
PART
MAX1551EZK-T
MAX1555EZK-T
Ordering Information
TEMP RANGE
-40°C to +85°C
-40°C to +85°C
PIN-PACKAGE
5 Thin SOT23-5
5 Thin SOT23-5
PART
MAX1551EZK
MAX1555EZK
Selector Guide
TOP MARK
ADRT
ADRU
FEATURES
POK Output
CHG Output
Pin Configuration
Typical Operating Circuit
TOP VIEW
USB 1
5 BAT
MAX1551
GND 2 (MAX1555)
POK 3
(CHG)
4 DC
THIN SOT23
Pin Configurations appear at end of data sheet.
Functional Diagrams continued at end of data sheet.
UCSP is a trademark of Maxim Integrated Products, Inc.
AC ADAPTER
3.7V TO 7V
DC
BAT
USB
3.7V TO 6V
CHARGE
USB CONTROL
MAX1551
(MAX1555)
LOGIC
POK
CONTROL (CHG)
GND
TO SYSTEM
LOAD
Li+
TO LOGIC RAIL
For pricing, delivery, and ordering information, please contact Maxim Direct
at 1-888-629-4642, or visit Maxim’s website at www.maximintegrated.com.
19-2902; Rev 0; 7/03
http://www.Datasheet4U.com




 MAX1555
MAX1551/MAX1555
SOT23 Dual-Input USB/AC Adapter 1-Cell Li+
Battery Chargers
ABSOLUTE MAXIMUM RATINGS
DC to GND......................................................................0 to +8V
DC to BAT .......................................................................0 to +7V
BAT, CHG, POK, USB to GND .................................-0.3V to +7V
Continuous Power Dissipation (TA = +70°C)
5-Pin Thin SOT23 (derate 9.1mW/°C above +70°C) ....727mW
Operating Temperature Range ...........................-40°C to +85°C
Junction Temperature Range ............................-40°C to +150°C
Storage Temperature Range .............................-65°C to +150°C
Lead Temperature (soldering, 10s) .................................+300°C
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
(VDC = 5V, VUSB = 0, IBAT = 0, CBAT = 1µF, TA = 0°C to +85°C, unless otherwise noted.)
PARAMETER
CONDITIONS
DC
DC Voltage Range
DC to BAT Voltage Range
(Note 1)
DC Undervoltage Lockout
Threshold
Input rising, 430mV hysteresis, VBAT = 3V (Note 1)
DC Supply Current
DC to BAT On-Resistance
VDC = 3.7V, VBAT = 3.6V
DC to BAT Dropout Voltage
When charging stops, VBAT = 4V,
DC falling, 200mV hysteresis
USB
USB Voltage Range
(Note 1)
USB Undervoltage Threshold
USB Supply Current
USB to BAT On-Resistance
Input rising, 430mV hysteresis, VDC = 0,
VBAT = 3V (Note 1)
VUSB = 5V, VDC = 0
VUSB = 3.7V, VBAT = 3.6V, VDC = 0
USB to BAT Dropout Voltage
When charging stops, VBAT = 4V,
USB falling, 200mV hysteresis, VDC = 0
BAT
BAT Regulation Voltage
VDC or VUSB = 5V
DC Charging Current
VBAT = 3.3V, VUSB = 0, VDC = 5V
USB Charging Current
VBAT = 3.3V, VDC = 0, VUSB = 5V
BAT Prequal Threshold
VBAT rising, 100mV hysteresis
Prequalification Charging Current VBAT = 2.8V
BAT Leakage Current
VDC = VUSB = 0, VBAT = 4.2V
POK, CHG, AND THERMAL LIMIT
CHG Threshold
Charge current where CHG goes high,
IBAT falling, 50mA hysteresis
CHG, POK Logic-Low Output
CHG, POK Leakage Current
ICHG, IPOK = 10mA
VCHG, VPOK = 6V, TA = +25°C
Thermal-Limit Temperature
Charge current reduced by 17mA/°C above this
temperature
MIN TYP MAX UNITS
3.7
0.1
3.75
30
3.95
1.75
1
60
7.0
6.0
4.15
3
2
90
V
V
V
mA
mV
3.7
3.75
30
3.95
1.65
2
60
6.0
4.15
3
4
90
V
V
mA
mV
4.158 4.2 4.242
220 280 340
80 90 100
2.9 3 3.1
20 40 80
5
V
mA
mA
V
mA
µA
25 50 100
150
0.001
300
1
+110
mA
mV
µA
°C
2 Maxim Integrated
http://www.Datasheet4U.com




 MAX1555
MAX1551/MAX1555
SOT23 Dual-Input USB/AC Adapter 1-Cell Li+
Battery Chargers
ELECTRICAL CHARACTERISTICS
(VDC = 5V, VUSB = 0, IBAT = 0, CBAT = 1µF, TA = -40°C to +85°C, unless otherwise noted.) (Note 2)
PARAMETER
DC
DC Voltage Range
DC to BAT Voltage Range
(Note 1)
CONDITIONS
MIN MAX UNITS
3.7 7.0 V
0.1 6.0 V
DC Undervoltage Lockout
Threshold
Input rising, 430mV hysteresis, VBAT = 3V (Note 1)
DC Supply Current
DC to BAT On-Resistance
VDC = 3.7V, VBAT = 3.6V
DC to BAT Dropout Voltage
When charging stops, VBAT = 4V, DC falling, 200mV
hysteresis
USB
USB Voltage Range
(Note 1)
USB Undervoltage Lockout
Threshold
Input rising, 430mV hysteresis, VDC = 0, VBAT = 3V
(Note 1)
USB Supply Current
USB to BAT On-Resistance
VUSB = 5V, VDC = 0
VUSB = 3.7V, VBAT = 3.6V, VDC = 0
USB to BAT Dropout Voltage
When charging stops, VBAT = 4V, USB falling, 200mV
hysteresis, VDC = 0
BAT
BAT Regulation Voltage
DC Charging Current
USB Charging Current
BAT Prequal Threshold
Prequalification Charging Current
BAT Leakage Current
POK, CHG
VDC or VUSB = 5V
VBAT = 3.3V, VUSB = 0, VDC = 5V
VBAT = 3.3V, VDC = 0, VUSB = 5V
VBAT rising, 100mV hysteresis
VBAT = 2.8V
VDC = VUSB = 0, VBAT = 4.2V
CHG Threshold
CHG, POK Logic-Low Output
CHG, POK Leakage Current
Charge current where CHG goes high,
IBAT falling, 50mA hysteresis
ICHG, IPOK = 10mA
VCHG, VPOK = 6V, TA = +25°C
3.75
30
3.7
3.75
30
4.141
220
80
2.9
20
25
4.15
3
2
95
V
mA
mV
6.0
4.15
3
4
95
V
V
mA
mV
4.259
340
100
3.1
80
5
V
mA
mA
V
mA
µA
100 mA
300 mV
1 µA
Note 1: The input undervoltage lockout has 430mV of hysteresis. The charger turns on when an input rises to 3.95V (typ), and turns
off when it falls below 3.52V.
Note 2: Specifications to -40°C are guaranteed by design, not production tested.
Maxim Integrated
3
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