RT8859M
Absolute Maximum Ratings (Note 1)
z VCC toGND ---------------------------------------------------------------------------------------------------------−0.3V to 6.5V
z RGNDx toGND -----------------------------------------------------------------------------------------------------−0.3V to 0.3V
z TONSETx toGND --------------------------------------------------------------------------------------------------−0.3V to 28V
z Others -----------------------------------------------------------------------------------------------------------------−0.3V to (VCC + 0.3V)
z Power Dissipation, PD @ TA = 25°C
WQFN−56L 7x7 -----------------------------------------------------------------------------------------------------3.226W
z Package Thermal Resistance (Note 2)
WQFN−56L 7x7, θJA -----------------------------------------------------------------------------------------------31°C/W
WQFN−56L 7x7, θJC ----------------------------------------------------------------------------------------------6°C/W
z Junction Temperature ----------------------------------------------------------------------------------------------150°C
z Lead Temperature (Soldering, 10 sec.)------------------------------------------------------------------------260°C
z Storage Temperature Range -------------------------------------------------------------------------------------−65°C to 150°C
z ESD Susceptibility (Note 3)
HBM (Human Body Model)---------------------------------------------------------------------------------------2kV
Recommended Operating Conditions (Note 4)
z Supply Voltage, VCC ----------------------------------------------------------------------------------------------4.5V to 5.5V
z Junction Temperature Range-------------------------------------------------------------------------------------−40°C to 125°C
z Ambient Temperature Range-------------------------------------------------------------------------------------−40°C to 85°C
Electrical Characteristics
(VCC = 5V, TA = 25°C, unless otherwise specified)
Parameter
Supply Input
Symbol
Test Conditions
Min
Typ
Max
Unit
Supply Current
I
V
V
= 1.05V, Not Switching
= 0V
--
--
12
--
20
5
mA
VCC
EN
EN
Shutdown Current
Reference and DAC
I
μA
SHDN
V
= 1.000 to 1.520 (No Load, Active
DAC
−0.5
0
0.5
%VID
Mode)
V
V
V
= 0.800 to 1.000
−5
−8
−8
0
0
0
5
8
8
mV
mV
mV
DAC Accuracy
V
FB
DAC
DAC
DAC
= 0.500 to 0.800
= 0.250 to 0.500
RGND Current
RGND Current
Slew Rate
--
--
500
μA
I
V
= 1.05V, Not Switching
EN
RGND
Set VID Slow, SR_ADDF pin = 0V
Set VID Fast, SR_ADDF pin = 0V
2.5
10
3.125
12.5
3.75
15
Dynamic VID Slew Rate SR
mV/μs
Error Amplifier
DC Gain
A
R
C
= 47kΩ
--
--
80
10
--
--
dB
DC
LOAD
Gain-Bandwidth Product GBW
= 5pF
MHz
LOAD
C
R
= 10pF (Gain = −4,
LOAD
SR
Slew Rate
--
5
--
V/μs
= 47kΩ, V
= 0.5V to −3V)
LOAD
OUT
Copyright 2012 Richtek Technology Corporation. All rights reserved.
©
is a registered trademark of Richtek Technology Corporation.
www.richtek.com
18
DS8859M-05 July 2012
RICHTEK [ RICHTEK TECHNOLOGY CORPORATION ]
