Data Sheet

LT8418

analog.com

Rev 0

3 of 19

SPECIFICATIONS

Table 1. Electrical Characteristics

(TA = 25°C1, VCC = VBST = 5V, VGND = VSW = 0V; TGP and TGN are connected; BGP and BGN are connected)

PARAMETER

SYMBOL

CONDITIONS/COMMENTS

MIN

TYP

MAX

UNITS

Supply Voltage and Current

VCC Operating Voltage

Range

VCC

3.85

5.5

V

VCC Quiescent Current

IQ_VCC

INT = INB = 0V

250

µA

VCC Operating Current

IVCC

FSW = 400kHz

2.4

mA

BST Quiescent Current

IQ _BST

INT = INB = 0V

80

µA

BST Operating Current

IBST

FSW = 400kHz

1.0

mA

Undervoltage, Overvoltage Protections

VCC UVLO Threshold

VUVLO_VCC

Falling

3.14

3.35

3.67

V

VCC UVLO Hysteresis

VUVLO_HYST_VCC

0.2

V

VCC OVLO Threshold

VOVLO_VCC

Rising

5.58

6.0

6.53

V

VCC OVLO Hysteresis

VOVLO_HYST_VCC

0.2

V

BST UVLO Threshold

VUVLO_BST

Falling

2.9

3.1

3.35

V

BST UVLO Hysteresis

VUVLO_HYST_BST

0.25

V

Input Pins

INT, INB Input Turn-

On Threshold

VON_INT

VON_INB

Rising

1.4

1.9

2.4

V

INT, INB Input

Hysteresis

VHYST_INT

VHYST_INB

0.4

V

INT, INB Input

Resistance to Ground

RINT

RINB

200

kΩ

Bootstrap Switch

BST Switch Forward

Drop at Low Refresh

Current

VF_BST

IVCC-BST= 100 µA

1

10

mV

BST Switch Forward

Drop at High Refresh

Current

VF_BST

IVCC-BST= 100 mA

0.6

1

V

BST Switch Dynamic

On-Resistance

RBST

IVCC-BST= 100 mA

6

Ω

Gate Drivers

TG Driver RON

Gate Pull-Up

Gate Pull-Down

RTG_UP

RTG_DW

V(BST-SW) = 5V

0.6

0.2

Ω

Ω

BG Driver RON

Gate Pull-Up

Gate Pull-Down

RBG_UP

RBG_DW

VCC = 5V

0.6

0.2

Ω

Ω