MAX1644 Maxim, MAX1644 Datasheet - Page 3

• Manufacturer Part Number: MAX1644
• Description: Advanced Chemistry-Independent / Level 2 Battery Charger with Input Current Limiting
• Manufacturer: Maxim

ELECTRICAL CHARACTERISTICS (continued)
(V
ELECTRICAL CHARACTERISTICS
(V
Note 2: Recommended operating frequency, not production tested.
Note 3: Specifications from 0°C to -40°C are guaranteed by design, not production tested.
Undervoltage Lockout
Threshold
FB Input Bias Current
Off-Time Default Period
Off-Time Start-Up Period
On-Time Period
SS Source Current
SS Sink Current
SHDN Input Current
SHDN Input Low Threshold
SHDN Input High Threshold
FBSEL Input Current
FBSEL Logic Thresholds
Maximum Output RMS
Current
Input Voltage
Preset Output Voltage
Adjustable Output Voltage
Reference Voltage
PMOS Switch
On-Resistance
NMOS Switch
On-Resistance
Current-Limit Threshold
Idle Mode Current
Threshold
No-Load Supply Current
FB Input Bias Current
Off-Time Default Period
IN
IN
= V
= V
PARAMETER
CC
PARAMETER
CC
Synchronous Rectification and Internal Switches
= +3.3V, FBSEL = GND, T
= +3.3V, FBSEL = GND, T
_______________________________________________________________________________________
2A, Low-Voltage, Step-Down Regulator with
SYMBOL
SYMBOL
I
IN
R
V
R
I
V
I
SHDN
V
t
t
LIMIT
t
UVLO
ON, N
t
V
ON, P
I
OFF
OFF
I
I
V
V
I
OFF
OUT
I
ON
REF
+ I
FB
SS
SS
FB
IM
IH
IL
IN
CC
A
A
= 0°C to +85°C, unless otherwise noted. Typical values are at T
= -40°C to +85°C, unless otherwise noted. Typical values are at T
R
V
V
R
R
FB = GND
V
V
FBSEL = GND
FBSEL = REF
FBSEL = unconnected
FBSEL = V
I
V
V
FBSEL = GND or REF
I
I
V
V
R
LOAD
LX
LX
IN
FB
SS
TOFF
TOFF
FB
IN
FB
FB
TOFF
TOFF
SHDN
= 0.5A
= 0.5A
= 3.0V to 5.5V, I
falling, hysteresis = 40mV
= V
= 1.2V
= 1V
= 1.2V
= 1.2V
= 0 to 2A,
= 30.1kΩ
= 150kΩ
= 499kΩ
= 150kΩ
= 0 to V
OUT
CC
CC
V
FBSEL = unconnected
V
V
V
V
V
V
CONDITIONS
CONDITIONS
LOAD
IN
IN
IN
IN
IN
IN
IN
= V
= 3V to 5.5V, FBSEL = V
= 3V to 5.5V, FBSEL = REF
= 4.5V
= 3V
= 4.5V
= 3V
= 0,
CC
= 4V to 5.5V,
CC
0.7
V
3.276
CC
V
- 0.2
2.48
1.08
1.08
1.03
1.13
0.20
MIN
MIN
-0.5
100
3.0
2.3
0.2
2.5
0.4
3.5
2.0
0.9
REF
-5
0
0
·
- 0.2
V
CC
A
= +25°C.)
A
4
= +25°C.) (Note 3)
TYP
TYP
1.33
0.33
·
2.6
4.3
80
5
t
OFF
0.7
+ 0.2
·
3.390
MAX
MAX
2.57
1.12
1.12
1.63
1.53
150
200
150
200
360
250
200
V
5.5
3.5
0.7
2.7
5.6
6.5
0.5
0.8
0.2
1.3
5.8
+5
V
IN
CC
UNITS
UNITS
A
mΩ
mΩ
µA
nA
nA
µA
µA
µA
µA
RMS
µs
µs
µs
µs
A
A
V
V
V
V
V
V
V
V
3