Preliminary

RT9262/A

DS9262/A-04 August 2002

www.richtek.com

5

Electrical Characteristics

Parameter

Symbol

Test Conditions

Min

Typ

Max

Units

Start-UP Voltage

--

0.98

1.05

V

Operating VDD Range

0.8

--

6.5

*

V

--

47

--

µA

Switch-off Current I (VDD)

--

17

--

µA

--

0.1

1

µA

Feedback Reference Voltage

Close Loop, VDD = 3.3V

1.225

1.25

1.275

V

Feedback Reference

Voltage for LDO

RT9262

Close Loop, VDD = 3.3V

0.843

0.86

0.877

V

LBI Pin Trip Point

RT9262A

VDD = 3.3V

0.843

0.86

0.877

V

Switching Rate

VDD = 3.3V

--

550

--

KHz

Maximum Duty

VDD = 3.3V

--

92

--

%

LX ON Resistance

VDD = 3.3V

--

0.25

--

Ω

Current Limit Setting

VDD = 3.3V

--

2

--

A

EXT ON Resistance to VDD

VDD = 3.3V

--

40

--

Ω

EXT ON Resistance to GND

VDD = 3.3V

--

30

--

Ω

Line Regulation

∆V

LINE

--

10

--

mV/V

Load Regulation

∆V

LOAD

--

0.25

--

mV/mA

LDO PMOS ON Resistance RT9262

VDD = 3.3V

--

1

1.5

Ω

LDO Drop Out Voltage

RT9262

VDD = 3.3V, IL = 100mA

--

70

--

mV

LBO ON Resistance

RT9262A

VDD = 3.3V

--

40

--

Ω

CE Pin Trip Level

VDD = 3.3V

0.2

0.8

1.4

V

Temperature Stability for FB, LFB, LBI

Guaranteed by Design

--

50

--

ppm/°C

Thermal Shutdown

Guaranteed by Design

--

165

--

°C

Thermal Shutdown Hysterises

∆T

SD

Guaranteed by Design

--

10

--

°C

* Note: The CE pin shall be tied to VDD pin and inhibit to act the ON/OFF state whenever the VDD pin voltage

may reach to 5.5V or above.