FAN54005

www.onsemi.com

2

Figure 1. Typical Application

FAN54005

SW

L1

VBAT

+ Battery

CSIN

1mH

SYSTEM

LOAD

0.1mF

1mF

4.7mF

SDA

SCL

OTG/USB#

1mF

VREG

STAT

10 mF

DISABLE

VBUS

PMID

Block Diagram

Figure 2. IC and System Block Diagram

PWM

MODULATOR

PMID

SW

PMID

L1

CSIN

1mH

4.7mF

VREF

SDA

SCL

OTG

VBUS

1mF

STAT

I2C

INTERFACE

LOGIC

AND

CONTROL

PMID

OSC

30 mA

Q3

CHARGE

PUMP

VBUS

OVP

I_IN

CONTROL

VREG

1mF

DAC

DISABLE

1.8V / PMID REG

Q2

Q1B

Q1A

Q1

+

Battery

SYSTEM

LOAD

10 mF

0.1mF

PGND

47mF

PMID

Q1A

ON

OFF

Q1B

OFF

ON

Table 1. RECOMMENDED EXTERNAL COMPONENTS

Component

Description

Vendor

Parameter

Typ

Unit

L1

1 mH ±20%, 4.0 A, 33 mW, 2016

Semco CIGT201610EH1R0M

L

1.0

mH

10 mF, 20%, 6.3 V, X5R, 0603

Murata: GRM188R60J106M

TDK: C1608X5R0J106M

C

10

mF

4.7 mF, 10%, 10 V, X5R, 0603

Murata: GRM188R61A475K

TDK: C1608X5R1A475K

C (Note 1)

4.7

mF

1.0 mF, 10%, 25 V, X5R, 0603

Murata: GRM188R61E105K

TDK: C1608X5R1E105M

C

1.0

mF

1.0 mF, 10%, 10 V, X5R, 0402

Murata: GRM155R61A105K

TDK: C1005X5R1A105K

C

1.0

mF

0.1 mF, 10%, 16 V, X7R, 0402

Murata: GRM155R71C104K

TDK: C1005X7R1C104K

C

0.1

mF

n/a

n/a

C

47

mF

1. A 10 V rating is sufficient for CMID because PMID is protected from over−voltage surges on VBUS by Q3 (Figure 2).

2. A minimum 47 mF of distributed capacitance on SYS is required for proper operation of the FAN54005.