High-Efficiency, PWM, Step-Down
DC-DC Controllers in 16-Pin QSOP
MAX1652–MAX1655
ABSOLUTE MAXIMUM RATINGS
V+ to GND ..............................................................-0.3V to +36V
GND to PGND .......................................................-0.3V to +0.3V
VL to GND ................................................................-0.3V to +6V
BST to GND ............................................................-0.3V to +36V
DH to LX .....................................................-0.3V to (BST + 0.3V)
LX to BST..................................................................-6V to +0.3V
SHDN
to GND...............................................-0.3V to (V+ + 0.3V)
SYNC, SS, REF, SECFB,
SKIP,
FB to GND...-0.3V to (VL + 0.3V)
DL to PGND ..................................................-0.3V to (VL + 0.3V)
CSH, CSL to GND ....................................................-0.3V to +6V
VL Short Circuit to GND..............................................Momentary
REF Short Circuit to GND ...........................................Continuous
VL Output Current ...............................................+50mA to -1mA
REF Output Current...............................................+5mA to -1mA
Continuous Power Dissipation (T
A
= +70°C)
SO (derate 8.70mW/°C above +70°C) .......................696mW
QSOP (derate 8.3mW/°C above +70°C) ....................667mW
Operating Temperature Range
MAX165_E_E ..................................................-40°C to +85°C
Storage Temperature Range .............................-65°C to +160°C
Lead Temperature (soldering, 10sec) .............................+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
(V+ = +15V, GND = PGND = 0V, SYNC = REF, I
VL
= I
REF
= 0A,
T
A
= 0°C to +85°C,
unless otherwise noted.)
PARAMETER
3.3V AND 5V STEP-DOWN CONTROLLERS
Input Supply Range
5V Output Voltage (CSL)
3.3V Output Voltage (CSL)
Nominal Adjustable Output
Voltage Range
0 < (CSH - CSL) < 80mV, FB = VL, 6V < V+ < 30V,
includes line and load regulation
0 < (CSH - CSL) < 80mV, FB = 0V, 4.5V < V+ < 30V,
includes line and load regulation
MAX1655
External resistor divider
MAX1652/MAX1653/
MAX1654
MAX1655
Feedback Voltage
CSH - CSL = 0V, CSL = FB,
SKIP
= 0V, 4.5V < V+ < 30V
0 < (CSH - CSL) < 80mV
25mV < (CSH - CSL) < 80mV
6V < V+ < 30V
CSH - CSL, positive
CSH - CSL, negative
V
SS
= 0V
V
SS
= 4V
Falling edge, rising edge, hysteresis = 22mV (MAX1652)
Rising edge, falling edge, hysteresis = 22mV (MAX1654)
SHDN = 2V, 0 < I
VL
< 25mA, 5.5V < V+ < 30V
Rising edge, falling edge hysteresis = 50mV
Rising edge, falling edge hysteresis = 60mV
80
-50
2.5
2.0
2.45
-0.05
4.7
3.8
4.2
2.50
0
5.0
3.9
4.5
2.55
0.05
5.3
4.0
4.7
MAX1652/MAX1653/
MAX1654
4.5
4.85
3.20
1
2.5
0.97
2.43
1.00
2.50
2
1.2
0.03
100
-100
4.0
0.06
120
-160
6.5
5.06
3.34
30
5.25
3.46
5.5
5.5
1.03
2.57
V
V
V
V
V
CONDITIONS
MIN
TYP
MAX
UNITS
Load Regulation
Line Regulation
Current-Limit Voltage
SS Source Current
SS Fault Sink Current
FLYBACK/PWM CONTROLLER
SECFB Regulation Setpoint
%
%/V
mV
µA
mA
V
INTERNAL REGULATOR AND REFERENCE
VL Output Voltage
VL Fault Lockout Voltage
VL/CSL Switchover Voltage
V
V
V
2
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MAXIM [ MAXIM INTEGRATED PRODUCTS ]
