MAX5073 datasheet(2/25 Pages) MAXIM

2 / 25 page

2.2MHz, Dual-Output Buck or Boost Converter

with Internal Power MOSFETs

_______________________________________________________________________________________

ABSOLUTE MAXIMUM RATINGS

ELECTRICAL CHARACTERISTICS

(V+ = VL = 5.2V or V+ = 5.5V to 23V, EN_ = VL, SYNC = GND, IVL = 0mA, PGND = SGND, CBYPASS = 0.22µF, CVL = 4.7µF (ceram-

ic), ROSC = 10k

Ω (circuit of Figure 1), TA = TJ = TMIN to TMAX, unless otherwise noted.) (Note 1)

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 PGND............................................................-0.3V to +25V

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

VL to SGND...................-0.3V to the lower of +6V or (V+ + 0.3V)

BST1/VDD1, BST2/VDD2, DRAIN_, PGOOD2, PGOOD1 to

SGND .................................................................-0.3V to +30V

BST1/VDD1 to SOURCE1,

BST2/VDD2 to SOURCE2 ....................................-0.3V to +6V

SOURCE_ to SGND................................................-0.6V to +25V

EN_ to SGND .............................................-0.3V to (VL to +0.3V)

CLKOUT, BYPASS, OSC, COMP1,

COMP2, SYNC, FB_ to SGND ..................-0.3V to (VL + 0.3V)

SOURCE1, DRAIN1 Peak Current ..............................5A for 1ms

SOURCE2, DRAIN2 Peak Current ..............................3A for 1ms

VL, BYPASS to SGND Short Circuit............................Continuous

Continuous Power Dissipation (TA = +70°C)

28-Pin Thin QFN (derate 21.3mW/°C above +70°C).....2758mW*

Package Junction-to-Case Thermal Resistance (

θJC).......2°C/W

Operating Temperature Ranges:

MAX5073ETI (TMIN to TMAX)............................-40°C to +85°C

MAX5073ATI (TMIN to TMAX) .........................-40°C to +125°C

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

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

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

*As per JEDEC51 standard.

PARAMETER

SYMBOL

CONDITIONS

MIN

TYP

MAX

UNITS

SYSTEM SPECIFICATIONS

(Note 2)

5.5

23.0

Input Voltage Range

V+

VL = V+

4.5

5.5

Operating Supply Current

VL unloaded, no switching, VFB_ = 1V, V+ =

12V, ROSC = 60k

Ω

2.2

EN_ = 0, PGOOD_ floating, V+ = 12V,

ROSC = 60k

Ω (MAX5073ETI)

0.6

1.2

V+ Standby Supply Current

ISTBY

EN_ = 0, PGOOD_ floating, V+ = 12V,

ROSC = 60k

Ω (MAX5073ATI)

0.6

1.4

V+ = VL = 5V

V+ = 12V

Efficiency

VOUT1 = 3.3V at 1.5A,

VOUT2 = 2.5V at 0.75A

(fSW = 1.25MHz)

V+ = 16V

STARTUP/VL REGULATOR

VL Undervoltage Lockout Trip

Level

UVLO

VL falling

3.95

4.1

4.25

VL Undervoltage Lockout

Hysteresis

175

VL Output Voltage

V+ = 5.5V to 23V, ISOURCE = 0 to 40mA

4.9

5.2

5.5

BYPASS OUTPUT

IBYPASS = 0, ROSC = 60k

Ω (MAX5073ETI)

1.98

2.00

2.02

BYPASS Voltage

VBYPASS

IBYPASS = 0, ROSC = 60k

Ω (MAX5073ATI)

1.975

2.00

2.025

BYPASS Load Regulation

∆VBYPASS 0 ≤ IBYPASS ≤ 50µA, ROSC = 60kΩ

SOFT-START

Digital Ramp Period

Internal 6-bit DAC

2048

fOSC

clock

cycles

Soft-Start Steps

steps

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