RT8205A Datasheet, PDF (10/28 Pages) Richtek Technology Corporation – High Efficiency, Main Power Supply Controllers for Notebook Computers

RT8205A/B/C
Electrical Characteristics
(VIN = 12V, EN = 5V, ENTRIP1 = ENTRIP2 = 2V, No Load on VREG5, VREG3, VOUT1, VOUT2 and REF, TA = 25°C, unless
otherwise specified)
Parameter
Symbol
Test Conditions
Min Typ Max Unit
Input Supply
VIN Standby Supply
Current
I_{VIN_SBY}
V_IN = 6V to 25V, Both SMPS Off,
EN = 5V
-- 200 --
μA
VIN Shutdown Supply
Current
I_{VIN_SHDH} V_IN = 6V to 25V, ENTRIPx = EN = GND
-- 20 40 μA
Quiescent Power
Consumption
Both SMPSs On, FBx = SKIPSEL = REF
V_OUT1 = 5.3V, V_OUT2 = 3.5V (Note 5)
--
5
7 mW
SMPS Output and FB Voltage
VOUT1 Output Voltage in
Fixed Mode
VOUT2 Output Voltage in
Fixed Mode
FBx in Output Adjustable
Mode
SECFB Voltage
Output Voltage Adjust
Range
FBx Adjustable-mode
Threshold Voltage
V_OUT1
V_OUT2
FBx
SECFB
V_OUTx
DC Load Regulation
V_LOAD
Line Regulation
On Time
V_LINE
V_IN = 6V to 25V, FB1= GND or 5V,
SKIPSEL = GND
V_IN = 6V to 25V, FB2 = GND or 5V,
SKIPSEL = GND
V_IN = 6V to 25V
V_IN = 6V to 25V (RT8205C)
SMPS1, SMPS2
4.975 5.05 5.125 V
3.285 3.33 3.375 V
1.975 2 2.025 V
1.92 2 2.08 V
2
-- 5.5
V
Fixed or Adj-Mode comparator threshold 0.2 0.4 0.55 V
Either SMPS, SKIPSEL = GND, 0 to 5A
-- −0.1 --
%
Either SMPS, SKIPSEL = VREG5, 0 to 5A -- −1.7 --
%
Either SMPS, SKIPSEL = REF, 0 to 5A
-- −1.5 --
%
Either SMPS, V_IN = 6V to 25V
-- 0.005 -- %/V
On-Time Pulse Width
Minimum Off-Time
Ultrasonic Mode
Frequency
Soft Start
t_UGATEx
t_LGATEx
TONSEL = GND
TONSEL = REF
TONSEL = VREG5
V_OUT1 = 5.05V
V_OUT2 = 3.33V
V_OUT1 = 5.05V
V_OUT2 = 3.33V
V_OUT1 = 5.05V
V_OUT2 = 3.33V
SKIPSEL = VREG5 or VREG3
1895 2105 2315
999 1110 1221
1227 1403 1579
ns
647 740 833
895 1052 1209
475 555 635
200 300 400 ns
25 33 -- kHz
Soft-Start Time
t_SSx
Zero to Full Limit from ENTRIPx Enable
Current Sense
Current Limit Threshold
(Default)
ENTRIPx Source Current
ENTRIPx Current
Temperature Coefficient
ENTRIPx Adjustment
Range
V_ENTRIPx = VREG5, GND−PHASEx
I_ENTRIPx V_ENTRIPx = 0.9V
TC_IENTRIPx
V_ENTRIPx = I_ENTRIPx x R_ENTRIPx
--
2
--
ms
180 200 220 mV
9.4 10 10.6 μA
-- 1600 -- PPM/°C
0.5 --
2
V
Copyright ©2012 Richtek Technology Corporation. All rights reserved.
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10
is a registered trademark of Richtek Technology Corporation.
DS8205A/B/C-06 July 2012