6

GM7230

150KHz, 3A STEP DOWN VOLTAGE

SWITCHING REGULATORS

Electrical Characteristics: All Output Voltage Versions

Parameter

Condition

Symbol

Min

Typ

Max

Unit

Feedback Bias

Current

-

10

50

nA

100

Oscillator

Frequency

(Note 6)

127

150

173

kHz

110

173

Saturation

Voltage

-

1.16

1.4

V

1.5

Max Duty Cycle

(ON)

(Note 8)

DC

100

-

%

Min Duty Cycle

(OFF)

(Note 9)

DC

0

%

Current Limit

Peak Current (Notes 7, 8)

3.4

A

Output Leakage

Current

Output =0V (Notes 7, 9, 10)

-

-

100

µA

Output = -0.9V (Note 10)

-

2

-

mA

Quiescent

Current

(Note 9)

-

5

-

mA

Standby

Quiescent

Current

SD Pin = 5V (OFF), Note 10

-

70

200

μA

lnput Level

Low (ON)

-

1.3

0.6

V

High (OFF)

2.0

1.3

-

SD Pin lnput

Current

5

15

μA

= 0.5V (ON)

0.02

5

μA

Note 1: Absolute Maximum Ratings indicate limits beyond which damage to the device may occur. Operating

Ratings indicate conditions for which the device is intended to be functional, but do not

guarantee specific performance limits. For guaranteed specifications and test conditions, see the Electrical

Characteristics.

Note 2: The human body model is a 100pF capacitor discharged through a 1.5K

Ωresistor into each pin.

Note 4: All limits guaranteed at room temperature (standard type face) and at temperature extremes (bold type

face). All room temperature limits are 100% production tested. All limits at temperature extremes are

guaranteed via correlation using standard Statistical Quality Control (SQC) methods. All limits are used to

calculate Average Outgoing Quality Level (AOQL).

Note 5: External components such as the catch diode, inductor, input and output capacitors, and voltage

programming resistors can affect switching regulator system performance. When the GM7230 is used as

shown in the Figure 1 test circuit, system performance will be as shown in system parameters section of

Electrical Characteristics.

Note 6: The switching frequency is reduced when the second stage current limit is activated.

Note 7: No diode, inductor or capacitor connected to output pin.

Note 8: Feedback pin removed from output and connected to 0V to force the output transistor switch ON.

Note 9: Feedback pin removed from output and connected to 12V for the 3.3V, 5V, and the ADJ. version.