RT8204BGQW Richtek USA Inc, RT8204BGQW Datasheet - Page 6

• Manufacturer Part Number: RT8204BGQW
• Description: IC SYNC BUCK W/LDO CTRLR 16WQFN
• Manufacturer: Richtek USA Inc

Specifications of RT8204BGQW

• Topology: Step-Down (Buck) Synchronous (1), Linear (LDO) (1)
• Function: Any Function
• Number Of Outputs: 2
• Voltage/current - Output 1: Controller
• Voltage/current - Output 2: Controller
• W/led Driver: No
• W/supervisor: No
• W/sequencer: No
• Voltage - Supply: 4.5 V ~ 5.5 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 16-WFQFN Exposed Pad
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

RT8204B
www.richtek.com
6
Output Voltage Range
On-Time
Minimum Off-Time
V
Resistance
Current Sensing
I
Current Comparator Offset
Zero Crossing Threshold
Fault Protection
Current Limit Sense Voltage
Output UV Threshold
OVP Threshold
OV Fault Delay
VDD UVLO Threshold
Soft-Start Ramp Time
UV Blank Time
Thermal Shutdown
Thermal Shutdown Hysteresis
Driver On-Resistance
UGATE Driver Pull Up
UGATE Driver Sink
LGATE Driver Pull Up
LGATE Driver Pull Down
UGATE Driver Source/Sink
Current
LGATE Driver Source Current
LGATE Driver Sink Current
Dead Time
Logic I/O
Logic Input Low Voltage
Logic Input High Voltage
Logic Input Current
LIM
OUT
Source Current
Shutdown Discharge
Parameter
V
R
Symbol
RILIM
UGATEsk
V
R
EN/DEM = GND
LGATE = High
GND to OC
PHASE to GND, EN/DEM = 5V
GND to PHASE, R
GND to PHASE, R
With respect to error comparator
threshold
FB forced above OV threshold
Rising edge, Hysteresis = 20mV,
PWM disabled below this level
From EN high to internal V
reach 0.71V (0 95%)
From EN signal going high
BOOT to PHASE forced to 5V
BOOT to PHASE forced to 5V
LGATE, High State (Source)
LGATE, Low State (Sink)
UGATE forced to 2.5V,
BOOT to PHASE forced to 5V
LGATE forced to 2.5V
LGATE forced to 2.5V
LGATE Rising (PHASE = 1.5V)
UGATE Rising
EN/DEM Low
EN/DEM High
EN/DEM Float
EN/DEM = V
EN/DEM = 0
IN
TON
= 15V, V
= 1MΩ
Test Conditions
OUT
DD
= 1.25V,
ILIM
ILIM
= 2.5kΩ
= 10kΩ
REF
0.75
Min
267
250
−10
−10
170
4.1
2.9
18
35
60
10
−5
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1.35
DS8204B-03 March 2011
Typ
334
400
200
155
4.3
3.1
1.5
1.5
1.5
0.6
20
20
50
70
15
20
10
30
30
−1
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1
1
3
2
1
To be continued
Max
401
550
230
3.3
4.5
2.5
0.8
22
10
65
80
20
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5
5
5
5
5
Unit
mV
mV
mV
ms
μA
ms
μA
°C
°C
ns
ns
μs
ns
%
%
Ω
Ω
Ω
Ω
Ω
V
V
A
A
A
V
V