RT9173 Просмотр технического описания (PDF) - Richtek Technology

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RT9173

Peak 3A Bus Termination Regulator

Richtek Technology 

RT9173/A

Absolute Maximum Ratings

z Input Voltage ------------------------------------------------------------------------------------------------------------ 7V

z Power Dissipation ----------------------------------------------------------------------------------------------------- Internally Limited

z ESD Rating ------------------------------------------------------------------------------------------------------------- 2kV

z Storage Temperature Range ---------------------------------------------------------------------------------------- −65°C to 150°C

z Lead Temperature (Soldering, 10 sec.) --------------------------------------------------------------------------- 260°C

z Power Dissipation, PD @ TA = 25°C

TO-263-5 ----------------------------------------------------------------------------------------------------------------- 1.923W

TO-252-5 ----------------------------------------------------------------------------------------------------------------- 1.471W

SOP-8 -------------------------------------------------------------------------------------------------------------------- 0.625W

z Package Thermal Resistance (Note 3)

TO-263-5, θJC ---------------------------------------------------------------------------------------------------------- 7.7°C/W

TO-252-5, θJC ---------------------------------------------------------------------------------------------------------- 8°C/W

SOP-8, θJC -------------------------------------------------------------------------------------------------------------- 23.2°C /W

TO-263-5,θJA ------------------------------------------------------------------------------------------------------------ 52°C/W

TO-252-5, θJA ----------------------------------------------------------------------------------------------------------- 68°C/W

SOP-8, θJA -------------------------------------------------------------------------------------------------------------- 160°C/W

Electrical Characteristics

(VIN = 2.5V, VCNTL = 3.3V, VREFEN = 1.25V, COUT = 10μF (Ceramic), TA = 25°C, unless otherwise specified.)

Parameter

Symbol

Test Conditions

Min Typ Max Units

Output Offset Voltage

VOS

IOUT = 0A, Figure 1 (Note 1)

-20

0

20 mV

Load Regulation (DDR 1/2)

ΔVLOAD IL : 0A → 1.5A, Figure 1

IL : 0A → -1.5A

-- 0.8/1.2 2/3

%

-- 0.8/1.2 2/3

Input Voltage Range (DDR 1/2) VIN

Keep VCNTL ≥ VIN on operation power 1.6 2.5/1.8 --

V

(Note 2)

VCNTL on and power off sequences

-- 3.3 6

Operating Current of VCNTL

ICNTL

No Load

-- 6.5 10 mA

Current In Shutdown Mode

ISHDN

VREFEN < 0.2V, RL = 180Ω, Figure 2

--

50 90 μA

Short Circuit Protection

Current limit

ILIMIT

Over Temperature Protection

Figure 3,4

3.0 --

-- A

Thermal Shutdown Temperature TSD

Thermal Shutdown Hysteresis

3.3V ≤ VCNTL ≤ 5V

Guaranteed by design

125 150 -- °C

-- 50 -- °C

Shutdown Function

Shutdown Threshold Trigger

VTRIGGER Output = High, Figure 5

VTRIGGER Output = Low, Figure 5

0.8 --

--

V

--

-- 0.2

Note 1. VOS offset is the voltage measurement defined as VOUT subtracted from VREFEN.

Note 2. For safely operate your system, the 3.3V rail MUST be tied to VCNTL rather than 5V rail, especially for the new part of

RT9173ACL5.

Note 3. θJA is measured in the natural convection at TA = 25°C on a low effective thermal conductivity test board (single Layers,

1S) of JEDEC 51-3 thermal measurement standard. The case point of θJC is on the on the center of VCTRL pins (Lead

6 & 7) for SOP-8 packages, the center of heat sink (tab) for TO-252-5 and TO-263-5 packages.

DS9173/A-18 March 2007

www.richtek.com

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