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RT9715AGB
Schematic [ru]
16 pgs350.98 Kb0

Richtek RT9715AGB, RT9715AGF, RT9715AGQW, RT9715BGB, RT9715BGBG Schematic [ru]

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RT9715
90m
ΩΩ
Ω, 2A/1.5A/1.1A/0.7A High-Side Power Switches
ΩΩ
with Flag
General Description
The RT9715 is a cost-effective, low-voltage, single
N-MOSFET high-side Power Switch IC for USB application.
Low switch-on resistance (typ. 90mΩ) and low supply
current (typ. 50uA) are realized in this IC.
The RT9715 integrates an over-current protection circuit,
a short fold back circuit, a thermal shutdown circuit and an
under-voltage lockout circuit for overall protection. Besides,
a flag output is available to indicate fault conditions to the
local USB controller. Furthermore, the chip also integrates
an embedded delay function to prevent miss-operation from
happening due to inrush-current. The RT9715 is an ideal
solution for USB power supply and can support flexible
applications since it is available in various packages such
as SOT-23-5, SOP-8, MSOP-8 and WDFN-8L 3x3.
Ordering Information
RT9715
Package Type B : SOT-23-5 BG : SOT-23-5 (G-Type) BR : SOT-23-5 (R-Type) S : SOP-8 F : MSOP-8 QW : WDFN-8L 3x3 (W-Type)
Lead Plating System G : Green (Halogen Free and Pb Free)
Output Current/EN Function A : 2A/Active High B : 2A/Active Low C : 1.5A/Active High D : 1.5A/Active Low E : 1.1A/Active High F : 1.1A/Active Low G : 0.7A/Active High
Note :
Richtek products are :
` RoHS compliant and compatible with the current require-
ments of IPC/JEDEC J-STD-020.
H : 0.7A/Active Low
Features
Ω Ω
zz
90m
Ω (typ.) N-MOSFET Switch
z
zz
Ω Ω
zz
z Operating Range : 2.7V to 5.5V
zz
zz
z Reverse Blocking Current
zz
zz
z Under Voltage Lockout
zz
zz
z Deglitched Fault Report (FLG)
zz
zz
z Thermal Protection with Foldback
zz
zz
z Over Current Protection
zz
zz
z Short Circuit Protection
zz
zz
z UL Approved
zz
zz
z Nemko Approved
zz
zz
z RoHS Compliant and Halogen Free
zz
−−
−E219878
−−
−−
−NO49621
−−
Applications
z USB Peripherals
z Notebook PCs
Pin Configurations
(TOP VIEW)
5
23
SOT-23-5
5
23
GND
1
2
GND
3
9
4
EN/EN
4
FLG
VIN
4
EN/EN
8
7
6
5
VIN
5
VOUT GND
SOT-23-5 (G-Type)
GND
VIN
VIN
EN/EN
SOP-8/MSOP-8
VOUT VOUT VOUT FLG
VIN
VOUT GND
VOUT
FLG
SOT-23-5 (R-Type)
GND
VIN VIN
EN/EN
WDFN-8L 3x3
Marking Information
EN/EN
23
2
3
4
4
NC
8
7
6
5
VOUT
VOUT
VOUT
FLG
For marking information, contact our sales representative
directly or through a Richtek distributor located in your
area.
DS9715-03 April 2011 www.richtek.com
1
RT9715
Typical Application Circuit
Pull-Up Resistor (10K to 100K)
USB Controller
Supply Voltage
2.7V to 5.5V
RT9715A/C/E/G
Chip Enable
RT9715B/D/F/H
Chip Enable
C 1uF
VIN
IN
EN/EN
Note : A low-ESR 150uF aluminum electrolytic or tantalum between V
the 330mV maximum droop requirement in the hub V
BUS
FLG
RT9715
VOUT
GND
Ferrite
Beads
OUT
. (see Application Information Section for further details)
Functional Pin Description
Pin No .
SOT-23-5
SOT-23-5
(G-Type)
SOT-23-5
(R-Type)
SOP-8 /
MSOP-8
WDFN-8L
3X3
Pin Name Pin Function
1 1 5 6 , 7 , 8 6 , 7 , 8 VOUT Output Voltage.
2 2 2 1 1 GND Ground.
3 -- 1 5 5 FLG Fault FLAG Output.
4 4 3 4 4 EN/EN Chip Enable (Active High/Low).
5 5 4 2 , 3 2 , 3 VIN Power Input Voltage.
-- 3 -- -- -- NC No Internal Connection.
-- -- -- --
9 (Exposed
Pad)
The exposed pad must be soldered to a large
PCB and connected to GND for maximum power dissipation.
Function Block Diagram
Over -Current
C
OUT
10uF
+
150uF
Data
V
BUS
D+
D-
GND
and GND is strongly recommended to meet
VIN
EN/EN
Bias
Oscillator
UVLO
Charge
Pump
Thermal
Protection
Gate
Control
Current
Limiting
Output Voltage
Detection
Auto Discharge
Delay
VOUT
FLG
GND
DS9715-03 April 2011www.richtek.com
2
Absolute Maximum Ratings (Note 1)
RT9715
z Supply Input Voltage, V
z EN Voltage -------------------------------------------------------------------------------------------------------------- −0.3V to 6V
z FLAG Voltage ---------------------------------------------------------------------------------------------------------- 6V
z Power Dissipation, P
-------------------------------------------------------------------------------------------- 6V
IN
@ TA = 25°C
D
SOT-23-5 ---------------------------------------------------------------------------------------------------------------- 300mW
SOP-8 -------------------------------------------------------------------------------------------------------------------- 469mW
MSOP-8 ----------------------------------------------------------------------------------------------------------------- 469mW
WDFN-8L 3x3 ---------------------------------------------------------------------------------------------------------- 694mW
z Package Thermal Resistance (Note 2)
SOT-23-5, θJA----------------------------------------------------------------------------------------------------------- 250°C/W
SOP-8, θJA-------------------------------------------------------------------------------------------------------------- 160°C/W
MSOP-8, θJA------------------------------------------------------------------------------------------------------------ 160°C/W
WDFN-8L 3x3, θJA----------------------------------------------------------------------------------------------------- 108°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 Mode) ------------------------------------------------------------------------------------------ 2kV
MM (Machine Mode) -------------------------------------------------------------------------------------------------- 200V
Recommended Operating Conditions (Note 4)
z Supply Input Voltage, V
z EN Voltage -------------------------------------------------------------------------------------------------------------- 0V to 5.5V
z Junction Temperature Range ---------------------------------------------------------------------------------------- −40°C to 100°C
z Ambient Temperature Range ---------------------------------------------------------------------------------------- −40°C to 85°C
-------------------------------------------------------------------------------------------- 2.7V to 5.5V
IN
Electrical Characteristics
(VIN = 5V, C
Input Quiescent Current IQ Switch On, V
Input Shutdown Current I
Switch On Resistance
Current Limit
Short Current
= 1uF, C
IN
= 10uF, T
OUT
= 25°C, unless otherwise specified)
A
Parameter Symbol Test Conditions Min Typ Max Unit
= Open -- 50 70
OU T
Switch Off, V
SHDN
RT9715A/B VIN = 5V, I
RT9715C/D VIN = 5V, I
R
RT9715E/F VIN = 5V, I
RT9715G/H
DS(ON)
V
= 5V, I
IN
= Open -- 0.1 1
OUT
= 1.5A -- 90 110
OU T
=1.3A -- 90 110
OU T
= 1A -- 90 110
OU T
= 0.6A -- 90 110
OU T
mΩ
RT9715A/B 2 2.5 3.2
RT9715C/D 1.5 2 2.8 RT9715E/F 1.1 1.5 2.1 RT9715G/H
V
I
LIM
OUT
= 4V
0.7 1 1.4 RT9715A/B -- 1.7 -­RT9715C/D -- 1.4 -­RT9715E/F -- 1 --
I
SC_FB
RT9715G/H
V
= 0V, Measured Prior to
OUT
Thermal Shutdown
-- 0.7 --
uA
A
A
To be continued
DS9715-03 April 2011 www.richtek.com
3
RT9715
Parameter Symbol Test Conditions Min Typ Max Unit
EN/EN Thr eshold
EN/EN Input Current I
Output Leakage Current I
Output Turn-On Rise Time T
FLG Output Resistance
FLG Off Current I
Logic_High Voltage VIH V
Logic_Low Voltage V
V
IL
V
EN/EN
LEAKAGE
ON_RISE
R
FLG
FLG_OFF
FLG Delay Time TD
Shutdown Auto-Discharge Resistance
Under-Voltage Lockout V
Under-Voltage Hysteresis ΔV
R
Discharge
VIN Rising 1.3 1.7 -- V
UVLO
VIN Decreasing -- 0.1 -- V
UVLO
Thermal Shutdown Protection TSD
Thermal Shutdown Hysteresis V
Note 1. Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device.
These are stress ratings only, and functional operation of the device at these or any other conditions beyond those
indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating
conditions for extended periods may affect device reliability.
Note 2. θ
Note 3. Devices are ESD sensitive. Handling precaution is recommended. Note 4. The device is not guaranteed to function outside its operating conditions.
is measured in the natural convection at TA = 25°C on a low effective single layer thermal conductivity test board of
JA
JEDEC 51-3 thermal measurement standard.
= 2.7V to 5.5V 2 -- -- V
IN
= 2.7V to 5.5V -- -- 0.8 V
IN
= 5V
EN
= 0V, R
V
EN
1 0% to 90% of V
I
= 1mA -- 20 -- Ω
SI NK
V
FLG
= 5V
LOAD
= 0Ω
OUT
From fault condition to FLG assertion V
= 0V, V
EN
V
> 1V -- 120 -- °C
OUT
V
= 0V -- 100 -- °C
OUT
= 0V -- 20 -- °C
OUT
EN
= 5V
Rising -- 200 -- us
-- 0.01 0.1 uA
-- 0.5 1 uA
-- 0.01 1 uA
5 12 20 ms
-- 100 150 Ω
DS9715-03 April 2011www.richtek.com
4
Typical Operating Characteristics
RT9715
On Resistance vs. Input Voltage
108
I
= 2A
OUT
106
104
102
100
98
96
On Resistance (mΩ)
94
92
90
2.7 3.1 3.5 3.9 4.3 4.7 5.1 5.5
SOP-8
SOT-23-5
Input Voltage (V)
Quiescent Current vs. Input Voltage
60
No Load
58
56
54
52
50
48
46
44
Quiescent Current (uA)
42
40
2.7 3.1 3.5 3.9 4.3 4.7 5.1 5.5
Input Voltage (V)
On Resistance vs. Temperature
125
VIN = 5V, I
120
115
110
105
100
95
90
85
On Resistance (mΩ)
80
75
70
-40 -25 -10 5 20 35 50 65 80
OUT
= 2A
SOP-8
Temperature
SOT-23-5
(°C)
Quiescent Current vs. Temperature
60
VIN = 5V,No Load
59
58
57
56
55
54
53
52
Quiescent Current (uA)
51
50
-40 -25 -10 5 20 35 50 65 80 95 110
Temperature
(°C)
Shutdown Current vs. Input Voltage
1.0
No Load
0.9
0.8
0.7
0.6
0.5
0.4
0.3
0.2
Shutdown Current (uA)
0.1
0.0
2.7 3.1 3.5 3.9 4.3 4.7 5.1 5.5
Input Voltage (V)
Shutdown Current (uA)
Shutdown Current vs. Temperature
1.0
VIN = 5V
0.9
0.8
0.7
0.6
0.5
0.4
0.3
0.2
0.1
0.0
-40 -25 -10 5 20 35 50 65 80 95 110
Temperature
(°C)
DS9715-03 April 2011 www.richtek.com
5
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