CS5211

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3

MAXIMUM RATINGS

Pin Name

Pin Symbol

IC Power Input

16 V

−0.3 V

N/A

50 mA DC

Power input for the low side driver

16 V

−0.3 V

N/A

1.5 A Peak, 200 mA DC

Power Supply input for the high side driver

BST

20 V

−0.3 V

N/A

1.5 A Peak, 200 mA DC

Compensation Capacitor

COMP

6.0 V

−0.3 V

1.0 mA

1.0 mA

Voltage Feedback Input

6.0 V

−0.3 V

1.0 mA

1.0 mA

Oscillator Resistor

6.0 V

−0.3 V

1.0 mA

1.0 mA

Fast Feedback Input

6.0 V

−0.3 V

1.0 mA

1.0 mA

High−Side FET Driver

GATE(H)

20 V

−0.3 V

−2.0 V for 50 ns

1.5 A Peak

200 mA DC

1.5 A Peak, 200 mA DC

Low−Side FET Driver

GATE(L)

16 V

−0.3 V

−2.0 V for 50 ns

1.5 A Peak,

200 mA DC

1.5 A Peak, 200 mA DC

Positive Current Sense

IS+

6.0 V

−0.3 V

1.0 mA

1.0 mA

Negative Current Sense

IS−

6.0 V

−0.3 V

1.0 mA

1.0 mA

Power Ground

PGND

0.3 V

−0.3 V

1.5 A Peak,

200 mA DC

N/A

Logic Ground

LGND

0 V

0 V

100 mA

N/A

Sense Ground

SGND

0.3 V

−0.3 V

1.0 mA

1.0 mA

PACKAGE PIN DESCRIPTION

PIN NO.

PIN SYMBOL

FUNCTION

1

GATE(H)

High Side Switch FET driver pin. Capable of delivering peak currents of 1.0 A.

2

BST

Power supply input for the high side driver.

3

LGND

Reference ground. All control circuits are referenced to this pin. IC substrate connection.

4

Input for the PWM comparator.

5

Error amplifier input.

6

COMP

Error Amp output. PWM Comparator reference input. A capacitor to LGND provides error amp

compensation.

7

SGND

Internal reference is connected to this ground. Connect directly at the load for ground remote

sensing.

8

A resistor from this pin to SGND sets switching frequency.

9

Input Power Supply Pin. It supplies power to control circuitry. A 0.1 mF Decoupling cap is

recommended.

10

IS−

Negative input for overcurrent comparator.

11

IS+

Positive input for overcurrent comparator.

12

Power supply input for the low side driver.

13

GATE(L)

Low Side Synchronous FET driver pin. Capable of delivering peak currents of 1.0 A.

14

PGND

High Current ground for the GATE(H) and GATE(L) pins.