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MAX1964

Tracking/Sequencing Triple/Quintuple Power-Supply Controllers

Maxim Integrated 

Tracking/Sequencing Triple/Quintuple

Power-Supply Controllers

ABSOLUTE MAXIMUM RATINGS

IN, B2, B3, B4 to GND............................................-0.3V to +30V

B5 to OUT...............................................................-20V to +0.3V

VL, POK, FB, FB2, FB3, FB4, FB5 to GND ...............-0.3V to +6V

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

BST to GND ............................................................-0.3V to +36V

DH to LX ....................................................-0.3V to (VBST + 0.3V)

DL, OUT, COMP, ILIM to GND......................-0.3V to (VL + 0.3V)

VL Output Current ...............................................................50mA

VL Short Circuit to GND..................................................≤ 100ms

Continuous Power Dissipation (TA = +70°C)

16-Pin QSOP (derate 8.3mW/°C above +70°C)...........666mW

20-Pin QSOP (derate 9.1mW/°C above +70°C)...........727mW

Operating Temperature Range ...........................-40°C to +85°C

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

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

Lead Temperature (soldering, 10s) .................................+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

(VIN = 12V, ILIM = FB = GND, VBST - VLX = 5V, TA = 0°C to +85°C. Typical values are at TA = +25°C, unless otherwise noted.)

PARAMETER

GENERAL

SYMBOL

CONDITIONS

MIN TYP MAX UNITS

Operating Input Voltage Range

(Note 1)

VIN

4.5

28

V

Quiescent Supply Current

VFB = 0, VOUT = 4V,

MAX1964

IIN

VFB2 = VFB3 = VFB4 = 1.5V,

VFB5 = -0.1V

MAX1965

1.25

2.5

mA

1.5

3.0

VL REGULATOR

Output Voltage

Line Regulation

Undervoltage Lockout Trip Level

Minimum Bypass Capacitance

DC-DC CONTROLLER

Output Voltage (Preset Mode)

Typical Output Voltage Range

(Adjustable Mode) (Note 2)

VL

VUVLO

CBYP(MIN)

VOUT

VOUT

6V < VIN < 28V, 0.1mA < ILOAD <20mA

VIN = 6V to 28V

VL rising, 3% hysteresis (typ)

10mΩ < ESR < 500mΩ

FB = GND

4.75 5.00 5.25

V

3.0

%

3.2

3.5

3.8

V

1

µF

3.272 3.34 3.355

V

VSET

0.75 ✕ VIN

V

FB Set Voltage (Adjustable

Mode)

FB Dual-Mode™ Threshold

FB Input Leakage Current

FB to COMP Transconductance

Current-Sense Amplifier Voltage

Gain

VSET

FB = COMP

IFB

gm

ALIM

VFB = 1.5V

FB = COMP, ICOMP = ±5µA

VIN - VLX = 250mV

1.221 1.236 1.252

V

50

100 150

mV

0.01 100

nA

70

100 140

µS

4.46

4.9

5.44

V/V

Current-Limit Threshold

(Internal Mode)

VVALLEY VILIM = 5.0V

190

250

310

mV

Current-Limit Threshold

(External Mode)

Switching Frequency

VVALLEY VILIM = 2.5V

fOSC

440

530

620

mV

160

200

240

kHz

Dual Mode is a trademark of Maxim Integrated Products, Inc.

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