High-Efficiency, PWM, Step-Down

DC-DC Controllers in 16-Pin QSOP

2

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ABSOLUTE MAXIMUM RATINGS

ELECTRICAL CHARACTERISTICS

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+ 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

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

Rising edge, falling edge hysteresis = 60mV

Rising edge, falling edge hysteresis = 50mV

Rising edge, falling edge, hysteresis = 22mV (MAX1654)

CSH - CSL, negative

CSH - CSL, positive

Falling edge, rising edge, hysteresis = 22mV (MAX1652)

6V < V+ < 30V

25mV < (CSH - CSL) < 80mV

0 < (CSH - CSL) < 80mV, FB = VL, 6V < V+ < 30V,

includes line and load regulation

External resistor divider

0 < (CSH - CSL) < 80mV

CONDITIONS

V

4.2

4.5

4.7

VL/CSL Switchover Voltage

V

3.8

3.9

4.0

VL Fault Lockout Voltage

V

4.7

5.0

5.3

VL Output Voltage

-0.05

0

0.05

V

2.45

2.50

2.55

SECFB Regulation Setpoint

mA

2.0

SS Fault Sink Current

µA

2.5

4.0

6.5

SS Source Current

V

4.5

30

Input Supply Range

-50

-100

-160

mV

80

100

120

Current-Limit Voltage

%/V

0.03

0.06

Line Regulation

1.2

V

4.85

5.06

5.25

5V Output Voltage (CSL)

V

1

5.5

Nominal Adjustable Output

Voltage Range

%

2

Load Regulation

UNITS

MIN

TYP

MAX

PARAMETER

0 < (CSH - CSL) < 80mV, FB = 0V, 4.5V < V+ < 30V,

includes line and load regulation

V

3.20

3.34

3.46

3.3V Output Voltage (CSL)

2.5

5.5

MAX1655

MAX1652/MAX1653/

MAX1654

2.43

2.50

2.57

MAX1652/MAX1653/

MAX1654

CSH - CSL = 0V, CSL = FB,

SKIP = 0V, 4.5V < V+ < 30V

MAX1655

V

0.97

1.00

1.03

Feedback Voltage

3.3V AND 5V STEP-DOWN CONTROLLERS

FLYBACK/PWM CONTROLLER

INTERNAL REGULATOR AND REFERENCE