RT8206L RICHTEK [Richtek Technology Corporation], RT8206L Datasheet - Page 26

• Manufacturer Part Number: RT8206L
• Description: High Efficiency, Main Power Supply Controller for Notebook Computers
• Manufacturer: RICHTEK [Richtek Technology Corporation]

RT8206L/M
Copyright
www.richtek.com
26
Under voltage
Over voltage
Protection
Protection
Discharge
Power Up
Shutdown
Shutdown
Standby
Thermal
Mode
“>2V” High
“>2V” High
“>2V” High
“>2V” High
“>2V” High
“>2V” High
“>2V” High
“>2V” High
“>2V” High
RUN
ENLDO (V)
©
2012 Richtek Technology Corporation. All rights reserved.
Low
PVCC < UVLO threshold
ENLDO = high, EN1 or EN2
enabled
Either output > 112% of nominal
level.
Either output < 55% of nominal level
after 3ms time-out expires and
output is enabled.
Either SMPS output is still high in
either standby mode or shutdown
mode.
ENx < startup threshold,
ENLDO = high.
EN1, EN2, ENLDO=low
T
J
> +150°C
V
EN1
REF
REF
REF
High
High
High
Low
Low
Low
X
(V)
Condition
V
EN2
REF
High
REF
High
REF
High
Low
Low
Low
X
Table 2. Operation Mode Truth Table
(V)
Table 3. Power Up Sequencing
(after REF powers up)
(after REF powers up)
(after REF powers up)
(after REF powers up)
(after REF powers up)
(after REF powers up)
(after REF powers up)
(after REF powers up)
(after REF powers up)
LDO
Transitions to discharge mode after VIN POR and REF
become valid. LDO and REF remain active.
Normal Operation.
LGATEx is forced high. LDO and REF active. Exited by
VIN POR or by toggling ENLDO, ENx.
Both UGATEx and LGATEx are forced low until discharge
mode terminates. LDO and REF are active. Exited by VIN
POR or by toggling ENLDO, EN1, or EN2.
During discharge mode, the output capacitor discharges to
GND through an internal N-MOSFET switch.
LGATEx stays low. LDO and REF active.
All circuitry off.
All circuitry off. Exit by VIN POR or by toggling ENLDO,
ENx.
Off
On
On
On
On
On
On
On
On
On
is a registered trademark of Richtek Technology Corporation.
(after SMPS2 on)
5V SMPS1
Comment
Off
Off
Off
Off
Off
Off
On
On
On
On
DS8206L/M-07 June 2012
(after SMPS1 on)
3V SMPS2
Off
Off
Off
On
Off
Off
On
Off
On
On