WM8325 datasheet(18/254 Pages) CIRRUS

18 / 254 page

WM8325

Production Data

PD, February 2012, Rev 4.0

DC-DC3 and DC-DC4

Unless otherwise noted: VIN = 3.8V, VOUT = 1.8V, MODE = FCCM

(1), TJ = -40°C to +125°C; typical values are at TJ = 25°C

PARAMETER

SYMBOL

TEST CONDITIONS

MIN

TYP

MAX

UNIT

Input Voltage

VIN

2.7

5.5

Programmable

Output Voltage

VOUT

0.85

(4)

3.4

VOUT Step Size

VOUT_STEP

VOUT Accuracy

VOUT_ACC

VIN = 2.7V to 5.5V, IOUT = 0mA to 1000mA

-4

Undervoltage

margin

VUV

0.85V ≤ VOUT ≤ 3.4V

Output Current

IOUT

FCCM

(1) and Auto

(CCM/DCM with

(2)) Modes

Independent operation

(DC4_SLV=0)

1000

Dual mode operation

(DC4_SLV=1)

800

(5)

Hysteretic Mode, DCm_STNBY_LIM=01

100

(3)

LDO Mode

P-channel

Current Limit

IP_LIM

1600

Quiescent

Current

IOUT = 0mA, FCCM

(1) and Auto (CCM/DCM with

(2)) Modes (excluding switching losses)

330

A

IOUT = 0mA, Hysteretic Mode

110

IOUT = 0mA, LDO Mode

Shutdown

Current

ISD

DCm_ENA = 0

0.01

A

P-channel

On Resistance

RDSP

VIN = VGS = 3.8V, IDCmLX = 100mA

165



N-channel

On Resistance

RDSN

VIN = VGS = 3.8V, IDCmLX = -100mA

155



Switching

Frequency

FSW

MHz

Notes:

Forced Continuous Conduction Mode

Continuous / Discontinuous Conduction with Pulse-Skipping Mode

The maximum output current in Hysteretic mode can be adjusted using the DCm_STNBY_LIM registers

In FCCM mode, the minimum VOUT is 1.2V

In Dual mode operation, the ratings are ‘per converter’. The combined maximum output current is 1600mA

WM8325 датащи(PDF) 18 Page - Cirrus Logic

WM8325 датащи(HTML) 18 Page - Cirrus Logic

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 ...More

датащи скачать

ссылки URL