MAX8809A datasheet(5/50 Pages) MAXIM

Part #	MAX8809A

Description	VRD11/VRD10, K8 Rev F 2/3/4-Phase PWM Controllers with Integrated Dual MOSFET Drivers

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Manufacturer	MAXIM [Maxim Integrated Products]

Direct Link	https://www.maximintegrated.com/en.html

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5

VRD11/VRD10, K8 Rev F 2/3/4-Phase PWM

Controllers with Integrated Dual MOSFET Drivers

ELECTRICAL CHARACTERISTICS (continued)

(VVL_ = VBST_ = 6.5V, VCC = VEN = 5V, VILIM = 1.5V, VID_ = SEL = REF = BUF = unconnected, VCOMP = VRS+ = 1.0V, RVRREADY =

5k

Ω pullup to 5V, RSS/OVP = 12kΩ to GND, RNTC = 10kΩ to GND, fSW = 300kHz, RVRTSET = 118kΩ to GND, VCS_+ = VCS_- = 1V,

PWM_ = unconnected, RVRHOT = 249

Ω pullup to 1.05V, VGND = VPGND_ = VLX_ = VRS- = 0V, DL_ = DH_ = unconnected, TA = 0°C

to +85

°C. Typical values are at TA = +25°C, unless otherwise noted.)

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNITS

PWM DRIVER

Output Low Level

IPWM_ = +5mA

0.1

0.4

V

Output High Level

IPWM_ = -5mA

4.5

4.9

V

Source Current

VPWM_ = VCC - 2V

52

mA

Sink Current

VPWM_ = 2V

65

mA

Rise/Fall Times

10

ns

PWM Disable Program Threshold

4V < VCC < 5.5V

3.0

VCC -

0.7

V

GATE-DRIVER SPECIFICATIONS

VL_, BST_ to LX_ Input Voltage Range

4.5

6.5

V

LX Operating Range

26

V

VL_ UVLO Threshold (VL12,

MAX8809A; VL1, MAX8810A)

VVL_ rising, 250mV hysteresis (typ)

3.25

3.55

3.80

V

DH_ = BST_

1

1.6

Driver Static Supply Current, IVL_

(per Channel)

DH_ = LX_

1.1

1.8

mA

Boost Static Supply Current, IBST_

(per Channel)

DH_ = BST_

0.6

1

mA

Sourcing current, VVL _ = 6.5V

1.1

2.0

DH Driver Resistance

Sinking current, VVL _ = 6.5V

0.8

1.2

Ω

Sourcing current, VVL _ = 6.5V

0.85

1.7

DL Driver Resistance

Sinking current, VVL _ = 6.5V

0.3

0.6

Ω

DH_ Rise Time (trDH)CDH_ = 3000pF

14

ns

DH_ Fall Time (tfDH)CDH_ = 3000pF

9

ns

DL_ Rise Time (trDL)CDL_ = 3000pF

10

ns

DL_ Fall Time (tfDL)CDL_ = 3000pF

7

ns

DH_ Propagation Delay (tpDHf)

CS+ rising to DH falling

32

ns

Dead Time (tpDLr)

LX_ falling to DL_ rising

18

ns

Dead Time (tDEAD)

DL_ falling to DH_ rising

35

ns

INTERNAL BOOST-DIODE SPECIFICATIONS

On-Resistance

IBST_ = 2mA

6

Ω

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