Rainbow Electronics MAX1698 User Manual
Page 2
MAX1698
High-Efficiency Step-Up
Current Regulator for LEDs
2
_______________________________________________________________________________________
ABSOLUTE MAXIMUM RATINGS
ELECTRICAL CHARACTERISTICS
(V
CC
= +3.3V, T
A
= 0°C to +85°C, unless otherwise noted. Typical values are at T
A
= +25°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.
V
CC
, SHDN to GND ..................................................-0.3V to +6V
EXT, FB, CS, ADJ, REF to GND..................-0.3V to (V
CC
+ 0.3V)
GND to PGND.....................................................................±0.3V
Continuous Power Dissipation (T
A
= +70°C)
10-Pin µMAX (derate 5.6mW/°C above +70°C) ............444mW
Operating Temperature Range ...........................-40°C to +85°C
Junction Temperature ......................................................+150°C
Storage Temperature Range .............................-65°C to +150°C
Lead Temperature Range (soldering, 10s)......................+300°C
FB = GND, ADJ = REF, CS = GND
FB = GND, ADJ = REF
Rising edge
FB = GND
V
FB
= 0.3V
ADJ = REF
V
ADJ
= 100mV
CONDITIONS
mV
30
50
70
ADJ Start Threshold
µs
10
15
20
t
ON(MAX)
Maximum On Time
µs
0.8
1.0
1.2
t
OFF(MIN)
Minimum Off Time
A
RMS
0.8
I
CS
CS Input Current
A
0.8
1.5
2.5
CS Trip Current
V
2.25
2.4
2.55
Undervoltage Lockout
µA
260
500
I
CC
V
2.7
5.5
V
CC
Supply Voltage
Quiescent Supply Current
mV
80
Undervoltage Hysteresis
285
300
315
mV
18
24
30
V
FB
FB Regulation Voltage
UNITS
MIN
TYP
MAX
SYMBOL
PARAMETER
V
FB
= 300mV
nA
-15
15
I
FB
FB Input Bias Current
V
0.03
REF
V
ADJ
ADJ Input Range
ADJ Input Bias Current
I
ADJ
ADJ = REF
-50
50
nA
Shutdown Supply Current
SHDN = GND
0.01
1
µA
REF Output Voltage
V
REF
I
REF
= 0
1.20
1.25
1.30
V
REF Load Regulation
∆V
REF
I
REF
= 0 to 150µA
-2
-25
mV
REF Short-Circuit Current
REF = GND
0.45
1
mA
REF Power-Supply Rejection
Ratio
PSRR
V
CC
= 2.7V to 5.5V
+0.3
+2
mV/V
EXT Driver Sink/Source Current
V
CC
= 5V, EXT = 2V
0.2
A
EXT Driver On-Resistance
V
CC
= 5V
8
Ω
SHDN Input High Voltage
V
IH
V
CC
= 2.7V to 5.5V
2
V
SHDN Input Low Voltage
V
IL
V
CC
= 2.7V to 5.5V
0.8
V
SHDN Input Bias Current
I
SHDN
V
CC
= 2.7V to 5.5V
-1
1
µA