RT8206A/B
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DS8206A/B-06 August 2011 www.richtek.com
Table 2. Operation Mode Truth Table
Mode Condition Comment
Power UP PVCC
< UVLO threshold
Transitions to discharge mode after a VIN POR and
after REF becomes valid. LDO and REF remain active.
RUN ENLDO = high, EN1 or EN2 enabled Normal Operation.
Over voltage
Protection
Either output > 111% of nominal
level.
LGATEx is forced high. LDO and REF active. Exited by
VIN POR or by toggling EN LD O.
Under voltage
Protection
Either output<70% of nominal level
after 3ms time-out expires and output
is enabled.
Both UGATEx and LGATEx are forced low until enter
discharge mode terminates. LDO and REF are active.
Exited by VIN POR or by toggling ENLDO, EN1, or
EN2.
Discharge
Either SMPS output is still high in
either standby mode or shutdown
mode.
During discharge mode, the output capacitor
discharges to GND through an internal 20 switch.
Standby
ENx < startup threshold,
ENLDO = high.
LGATEx stays low. LDO and REF active.
Shutdown EN1, EN2, ENLDO=low All circuitry off.
Thermal Shutdown T
J
> +150°C All circuitry off. Exit by VIN POR or by toggling ENLDO.
Table 3. Power Up Sequencing
ENLDO (V) V
EN1
(V)
EN2
(V) LDO 5V SMPS1 3V SMPS2
Low X X Off Off Off
>2V” H igh Low Low
On
(after REF powers up)
Off Off
>2V” H igh Low REF
On
(after REF powers up)
Off Off
>2V” H igh Low High
On
(after REF powers up)
Off On
>2V” H igh REF Low
On
(after REF powers up)
Off Off
>2V” H igh REF REF
On
(after REF powers up)
Off Off
>2V” H igh REF High
On
(after REF powers up)
On
(after SMPS2 on)
On
>2V” H igh High Low
On
(after REF powers up)
On Off
>2V” H igh High REF
On
(after REF powers up)
On
On
(after SMPS1 on)
>2V” H igh High High
On
(after REF powers up)
On On
RT8206A/B
26
DS8206A/B-06 August 2011www.richtek.com
Information that is provided by Richtek Technology Corporation is believed to be accurate and reliable. Richtek reserves the right to make any change in circuit
design, specification or other related things if necessary without notice at any time. No third party intellectual property infringement of the applications should be
guaranteed by users when integrating Richtek products into any application. No legal responsibility for any said applications is assumed by Richtek.
Richtek Technology Corporation
Headquarter
5F, No. 20, Taiyuen Street, Chupei City
Hsinchu, Taiwan, R.O.C.
Tel: (8863)5526789 Fax: (8863)5526611
Richtek Technology Corporation
Taipei Office (Marketing)
5F, No. 95, Minchiuan Road, Hsintien City
Taipei County, Taiwan, R.O.C.
Tel: (8862)86672399 Fax: (8862)86672377
Email: marketing@richtek.com
Outline Dimension
E
D
1
D2
E2
L
b
e
A
A1
A3
SEE DETAIL A
Note : The configuration of the Pin #1 identifier is optional,
but must be located within the zone indicated.
DETAIL A
Pin #1 ID and Tie Bar Mark Options
1
1
2
2
Dimensions In Millimeters Dimensions In Inches
Symbol
Min Max Min Max
A 0.700 0.800 0.028 0.031
A1 0.000 0.050 0.000 0.002
A3 0.175 0.250 0.007 0.010
b 0.180 0.300 0.007 0.012
D 4.950 5.050 0.195 0.199
D2 3.400 3.750 0.134 0.148
E 4.950 5.050 0.195 0.199
E2 3.400 3.750 0.134 0.148
e 0.500 0.020
L 0.350 0.450
0.014 0.018
W-Type 32L QFN 5x5 Package

RT8206BGQW

Mfr. #:
Manufacturer:
Description:
IC REG CTRLR NOTEBK 2OUT 32WQFN
Lifecycle:
New from this manufacturer.
Delivery:
DHL FedEx Ups TNT EMS
Payment:
T/T Paypal Visa MoneyGram Western Union

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