AP2953A

Chipown

8/F, ChuangYuan Building

No.21-1 Changjiang Road, Wuxi New Destrict Tel: +86(510)8521-7718

http://www.chipown.com.cn

V2.0

2 / 9

Absolute Maximum Ratings

(1)

Supply Voltage (VIN)..................................-0.3V to 20V

Switch Voltage (VSW)......................–1V to VIN + 0.3V

Bootstrap Voltage (VBS) ..........Vsw-0.3V to VSW + 6V

Enable/UVLO Voltage (VEN)....................–0.3V to +6V

Comp Voltage (VCOMP) ..........................–0.3V to +6V

Feedback Voltage (VFB) ...........................–0.3V to +6V

Junction Temperature .................................... +150℃

Lead Temperature (Soldering, 10s)................... +260℃

Storage Temperature....................... –55°C to +150℃

Recommended Operating Conditions

(2)

Input Voltage (VIN) ........................................ 4.75V to 18V

Output Voltage (VSW) .................................... 0.925 to 15V

Operating Temperature...................................–20℃to +85℃

Thermal Resistance

(3)

θ

JA

θ

JC

SOP8-PP ...................................... 50...... 10... ℃/W

Notes:

1) Exceeding these ratings may damage the device.

2) The device is not guaranteed to function outside of its

operating conditions.

3) Measured on approximately 1”square of 1 oz copper.

Electrical Characteristics

VIN = 12V, TA = +25℃, unless otherwise noted.

Parameter

Condition

Min

Typ

Max

Units

Shutdown Supply Current

VEN ≤ 0.3V

0.3

3

µA

Supply Current

VEN = 2.0V, VFB = 1.0V

1.3

1.5

mA

Feedback Voltage

4.75V≤VIN ≤18V

900

925

950

mV

Feedback Overvoltage Threshold

1.1

V

Error Amplifier Voltage

480

V/V

Error Amplifier Transconductance

ΔIC = ±10μA

800

µA/V

High-Side Switch-On Resistance

100

mΩ

Low-Side Switch-On Resistance

100

mΩ

High-Side Switch Leakage

VEN = 0V, VSW = 0V

0

10

µA

Upper Switch Current Limit

4

6

A

Lower Switch Current Limit

0.9

A

COMP to Current Sense Transconductance

5.2

А/V

Oscillator Frequency

310

370

390

KHz

Short Circuit Frequency

VFB = 0V

150

KHz

Maximum Duty Cycle

VFB = 1.0V

90

%

Minimum On Time

220

nS

EN Shutdown Threshold Voltage

VEN Rising

1.1

1.3

1.5

V

EN Shutdown Threshold Voltage Hysterisis

200

mV

EN Lockout Threshold Voltage

2.2

2.5

2.7

V

EN Lockout Hysterisis

210

mV

Input UVLO Threshold Rising

VIN Rising

3.8

4.05

4.4

V

Input UVLO Threshold Hysteresis

210

mV

Soft-start Current

VSS = 0V

6

µA

Soft-start Period

CSS = 0.1μF

15

ms

Thermal Shutdown

160

°C