MAX16955

36V, 1MHz Step-Down Controller

with Low Operating Current

2

Maxim Integrated

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.

Note 1: Package thermal resistances were obtained using the method described in JEDEC specification JESD51-7, using a four-layer

board. For detailed information on package thermal considerations, refer to www.maximintegrated.com/thermal-tutorial.

SUP and EN to SGND ............................................-0.3V to +42V

LX to PGND ..............................................................-1V to +42V

BST to LX .................................................................-0.3V to +6V

BIAS, FB, PGOOD, FSYNC to SGND .......................-0.3V to +6V

DH to LX ...................................................................-0.3V to +6V

CS and OUT to SGND ............................................-0.3V to +11V

PGND to SGND .....................................................-0.3V to +0.3V

TSSOP (derate 26.1mW/°C above +70°C) .............2088.8mW*

Operating Temperature Range .........................-40°C to +125°C

Junction Temperature ......................................................+150°C

Storage Temperature Range .............................-65°C to +150°C

Lead Temperature (soldering, 10s) .................................+300°C

Soldering Temperature (reflow) .......................................+260°C

PACKAGE THERMAL CHARACTERISTICS (Note 1)

TSSOP

Junction-to-Ambient Thermal Resistance (

Junction-to-Case Thermal Resistance (

PARAMETER

SYMBOL

CONDITIONS

MIN

TYP

MAX

UNITS

SUP Input Voltage Range

(Note 3)

3.5

36

V

SUP Operating Supply Current

Fixed 5V output, fixed-frequency, PWM

connected

1

mA

Skip Mode Supply Current

No load, fixed 5V output

50

90

µA

SUP Shutdown Supply Current

10

20

µA

3.0

BIAS Voltage

4.7

5.0

5.3

V

BIAS Undervoltage Lockout

3.1

3.4

V

BIAS Undervoltage Lockout

Hysteresis

200

mV

BIAS Minimum Load

45

mA

OUTPUT VOLTAGE (OUT)

Output Voltage Adjustable

Range

1.0

10

V

OUT Pulldown Resistance

30

Output Voltage (5V Fixed Mode)

frequency mode (Note 4)

4.925

5.0

5.075

V

FB Feedback Voltage

(Adjustable Mode)

< 80mV, fixed-frequency mode

0.99

1.0

1.01

V

FB Current

0.02

µA

*

As per JEDEC51 standard (multilayer board).