MAX8900A(2010) View Datasheet(PDF) - Maxim Integrated

Part Name

Description

Manufacturer

MAX8900A
(Rev.:2010)

1.2A Switch-Mode Li+ Chargers with ±22V Input Rating and JEITA Battery Temperature Monitoring

Maxim Integrated 

1.2A Switch-Mode Li+ Chargers with ±22V Input

Rating and JEITA Battery Temperature Monitoring

Pin Configuration

+

BAT

A1

BAT

B1

STAT2

C1

STAT1

D1

DNI

E1

TOP VIEW (BUMPS DOWN)

CS

LX

PGND

BST

A2

A3

A4

A5

CS

LX

PGND PGND

B2

B3

B4

B5

CEN

INBP

INBP

INBP

C2

C3

C4

C5

STAT3

IN

IN

IN

D2

D3

D4

D5

SETI

CT

THM

AVL

E2

E3

E4

E5

PVL

A6

PGND

B6

INBP

C6

IN

D6

GND

E6

30 WLP

(0.4mm PITCH)

PIN

A1, B1

A2, B2

A3, B3

A4, B4,

B5, B6

A5

A6

C1

C2

NAME

BAT

CS

LX

PGND

BST

PVL

STAT2

CEN

Pin Description

FUNCTION

Connection to Battery. Connect to a single-cell Li+/Li-Poly battery from BAT to PGND. Connect both

BAT pins together externally. Bypass BAT to PGND with a 2.2FF ceramic capacitor.

40mI Current-Sense Node. Connect the inductor from LX to CS. Connect both CS pins together

externally.

Inductor Switching Node. Connect the inductor between LX and CS. Connect both LX pins together

externally. When enabled (CEN = 0), LX switches between INBP and PGND to control the battery

charging. When disabled (CEN = 1), the LX switches are high-impedance however they still have

body diodes as shown in Figure 3.

Power Ground for Step-Down Low-Side Synchronous n-Channel MOSFET. Connect all PGND pins

together externally.

Supply for High-Side n-Channel Gate Driver. Bypass BST to LX with a 0.1FF ceramic capacitor.

5V Linear Regulator to Power Internal Circuits. PVL also charges the BST capacitor. Bypass PVL to

PGND with a 1.0FF ceramic capacitor. Powering external loads from PVL is not recommended.

Status Output 2. STAT2 is an open-drain output that has a 30V absolute maximum rating and a typical

pulldown resistance of 25I. For the MAX8900A, STAT1 and STAT2 indicate different states as shown

in Table 4. For the MAX8900B, STAT1, STAT2, and STAT3 indicate different operating states of the

MAX8900_ as shown in Table 3.

Charge Enable Input. CEN has an internal 200kI pulldown resistor. Pull CEN low or leave it

unconnected to enable the MAX8900_. Drive CEN high to disable the MAX8900_. Note: VIN must be

greater than VUVLO-RISING for the MAX8900_ to operate when CEN is pulled low. For example, if CEN

is low and the MAX8900_ is operating with VUVLO-FALLING < VIN < VUVLO-RISING, then toggling CEN

results in a nonoperating condition.

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