Lo w -No is e , 5 .5 V-In p u t ,
P WM S t e p -Do w n Re g u la t o r
ABSOLUTE MAXIMUM RATINGS
Continuous Power Dissipation (T = +70°C)
IN, BP, SHDN, SYNC/PWM, LIM to GND ................ -0.3V to +6V
BP to IN .................................................................-0.3V to +0.3V
PGND to GND ...................................................... -0.3V to +0.3V
A
10-Pin µMAX (derate 5.6mW/°C above +70°C) ............444mW
Operating Temperature Range .......................... -40°C to +85°C
Maximum Junction Temperature .................................... +150°C
Storage Temperature Range ............................ -65°C to +160°C
Lead Temperature (soldering, 10sec) .............................+300°C
LX to PGND................................................. -0.3V to (V + 0.3V)
IN
FB, REF to GND ......................................... -0.3V to (V + 0.3V)
BP
Reference Current ............................................................. ±1mA
LX Peak Current (internally limited)...................................... 1.6A
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.
MAX1692
ELECTRICAL CHARACTERISTICS
(V = +3.6V, SYNC/PWM = GND, V
= 3.6V, SHDN = IN, circuit of Figure 2; T = 0°C to +85°C, unless otherwise noted. Typical
IN
LIM
A
values are at T = +25°C.)
A
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
Input Voltage Range
V
IN
2.7
5.5
V
FB = OUT, V = V
= 2.7V to 5.5V,
IN
LIM
1.223
1.249
1.232
1.275
I
= 0
OUT
Output Voltage
V
OUT
V
FB = OUT, V = 2.7V to 5.5V,
IN
I
= 0 to 600mA, LIM = IN or
= 0 to 250mA, LIM = GND
1.190
1.275
OUT
I
OUT
Output Adjustment Range
Feedback Voltage
Line Regulation
(Note 1)
FB = OUT, V = V
(duty cycle = 23%) (Note 2)
V
V
V
V
REF
IN
= 5.5V, I = 0
OUT
IN
LIM
V
1.223
1.249
+1
1.275
FB
Duty cycle = 100% to 23%
%
%
nA
Ω
I
= 0 to 600mA, LIM = IN or
OUT
Load Regulation
-1.3
I
= 0 to 250mA, LIM = GND
= 1.4V
FB
OUT
FB Input Current
I
FB
V
-50
0.01
0.3
0.4
0.4
0.5
0.6
1.2
-850
50
50
V
= 3.6V
= 2.7V
= 3.6V
= 2.7V
0.65
IN
P-Channel On-Resistance
P
I
= 180mA
= 180mA
RDS(ON)
LX
V
IN
V
0.8
IN
Ω
N-Channel On-Resistance
N
I
LX
RDS(ON)
V
IN
LIM = GND
LIM = IN
0.35
0.75
-450
0
0.85
1.55
-1600
100
P-Channel Current-Limit
Threshold
A
V
FB
= 1.4V
N-Channel Current-Limit
Threshold
mA
mA
µA
µA
SYNC/PWM = IN, FB = REF
Pulse-Skipping Current-Limit
Threshold
80
120
85
160
140
10
SYNC/PWM = GND, V = 1.4V,
FB
LX unconnected
Quiescent Current
SHDN = LX = GND, includes LX leakage
current
Shutdown Supply Current
0.1
LX Leakage Current
Oscillator Frequency
SYNC Capture Range
Maximum Duty Cycle
Minimum Duty Cycle
Reference Output Voltage
V
= 5.5V, V = 0 or 5.5V
-20
650
500
100
0.1
20
µA
kHz
kHz
%
IN
LX
f
750
830
OSC
1000
duty
duty
MAX
22
%
MIN
V
I
= 0
1.235
1.250
1.265
V
REF
REF
2
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MAXIM [ MAXIM INTEGRATED PRODUCTS ]
