MAX17085B datasheet(5/37 Pages) MAXIM

Part #	MAX17085B

Description	Integrated Charger, Dual Main Step-Down Controllers, and Dual LDO Regulators

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Manufacturer	MAXIM [Maxim Integrated Products]

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Integrated Charger, Dual Main Step-Down

Controllers, and Dual LDO Regulators

_______________________________________________________________________________________ 5

ELECTRICAL CHARACTERISTICS (continued)

(Circuit of Figure 1, no load on LDO5, LDO3, OUT5, OUT3, and REF, VCC = 5V, ON3 = ON5 = VCC, VDCIN = VLXC = VCSSP = VCSSN

= 19V, VBSTC - VLXC = 5V, VBATT = VCSIP = VCSIN = 12.6V, VVCTL = VISET = 1.8V, CELLS = open, TA = 0°C to +85°C, unless oth-

erwise noted. Typical values are at TA = +25°C.)

PARAMETER

SYMBOL

CONDITIONS

MIN

TYP

MAX

UNITS

MAIN SMPS INPUTS AND OUTPUTS

SKIP Threshold Voltage

VSKIP

High = SKIP

2.3

VCC

V

Mid = PWM

1.5

1.9

Low = ultrasonic

0

0.8

SKIP Leakage Current

VSKIP = 0 or 5V, TA = +25°C

-2

+2

F

A

ON_ Input Logic Levels

High (SMPS on)

2.4

V

Low (SMPS off)

0.8

ON_ Leakage Current

VON3 = VON5 = 0 or 5V, TA = +25°C

-2

+2

F

A

OUT_ Discharge-Mode

On-Resistance

RDSCHG

ON_ = GND

7.5

20

50

I

SMPS GATE DRIVERS

DH3, DH5 Gate Driver

On-Resistance

RDH3, RDH5

BST3 - LX3 and BST5 - LX5 forced to 5V;

high state

1.6

3.8

I

BST3 - LX3 and BST5 - LX5 forced to 5V; low

state

1.6

3.8

DL3, DL5 Gate Driver

On-Resistance

RDL3, RDL5

DL3, DL5; high state

1.5

3.5

I

DL3, DL5; low state

0.6

1.5

DH3, DH5 Gate Driver Source/

Sink Current

IDH

DH3, DH5 forced to 2.5V,

BST3 - LX3 and BST5 - LX5 forced to 5V

2

A

DL3, DL5 Gate Driver

Source Current

IDL(SOURCE) DL3, DL5 forced to 2.5V

1.7

A

DL3, DL5 Gate Driver

Sink Current

IDL(SINK)

DL3, DL5 forced to 2.5V

3.3

A

DHC Gate Driver On-

Resistance

RDHC

High state, IDHC = 10mA

1.5

3

I

Low state, IDHC = -10mA

0.8

2.1

DLC Gate Driver

On-Resistance

RDLC

High state, IDLC = 10mA

3

6

I

Low state, IDLC = -10mA

3

6

Internal BST_ Switch

On-Resistance

RBST

IBST_ = 10mA, VDD = 5V

5

I

BST_ Leakage Current

IBST

VBST_ = 24V, OUT3 and OUT5 above

regulation threshold, TA = +25

°C

2

20

F

A

CHARGER SMPS

DHC Off-Time K Factor

VDCIN = 19V, VBATT = 10V

30

35

40

ns/V

Sense Voltage for Minimum

Discontinuous Mode Ripple

Current

VCSIP - VCSIN

5

mV

Zero Crossing Comparator

Threshold

VCSIP - VCSIN

10

mV

Cycle-by-Cycle Current- Limit

Sense Voltage

VCSIP - VCSIN

120

125

130

mV

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