Selection Guide 2013 - Ricoh

Power Management ICs (Switch ICs)
New : Under Development :
New Package :
Switch ICs
As for both portable and non-portable devices, electrical equipment are requested to minimise current consumption to save energy.
Therefore electrical equipment activate only specific circuits depending on the operating mode of the application. A common solution was to
use a discrete FET as a switch to shutdown the specific circuit blocks, however additional features for protection are needed.
Ricoh provides various solutions of switch ICs featuring a low ON resistance MOSFET and the required protection circuits into a single chip.
• Switch ICs Lineup
Category Function Applications Products
USB Switch
USB power line protection,
ON/OFF control of the USB power line.
USB host products
(PCs, PC peripherals, Digital TV, STB, Printers)
R5520H
R5523N
R5524x
Rectifier Switch Detects and corrects the polarity of reversed inserted batteries. Battery operated Toys, Portable health care devices R5590x
Load Switch
Intelligent Power
Switch
Battery Power Line
Switch
Power Selector
Switch
PC Card & Express
Card Power Switch
• Application of Switch ICs
ON/OFF control and distribution of the power line.
(Secondary power line switch)
Advanced protection of power line.
(Secondary power line switch)
Protection for battery line.
(Primary power line switch)
Can be used as a Load Switch.
Switching control for input power lines.
Necessary power saving appliance at standby and sleep state.
(Handheld communication equipments, DSC, DSLR, VCR)
Same as above.
(In case of need for advanced protection)
Portable equipments using rechargeable battery.
(Smartphone, Tablet, PND, Note PC)
Can be used as a Load Switch for non-portable appliances.
Switching between charging sources such as an AC adapter,
USB charger and wireless charger.
R5540K
R5541K
R5550K
R5527K
R5528Z
ON/OFF control of the PC Card power line. PC Card bus slot, PC Card reader writer R5533V
ON/OFF control of the Express Card power line. Express Card slot R5538D
TYPICAL APPLICATION FOR PORTABLE EQUIPMENT
TYPICAL APPLICATION FOR NON-PORTABLE EQUIPMENT
AC
Adapter or
USB
Device
USB
Power
Wireless
Charger
Power Selector
Switch
R5528Z
EN
R5528Z
EN
USB Switch
FLG
R5524x
R5523N
R5520H
USB Host
Controller
Charge Control
Circuit
EN
Rechargeable
Battery
Battery Power
Line Switch
R5527K
ON
Intelligent VSENSE
Power Switch
R5550K
Step-down
DC/DC
Converter
Step-down
DC/DC
Converter
Load Switch
R5540K
R5540K
CE
CE
R5541K
CE
Thermistor
Load
(~1A)
Load
(~450mA)
Load
(~450mA)
Load
(~3A)
Load
Load
AC
Power
USB
Device
Power
Management
Circuit
USB Switch
FLG
R5524x
R5523N
R5520H
EN
USB Host
Controller
Intelligent VSENSE
Power Switch
R5550K
Load Switch
R5541K
CE
R5540K
R5527K
CE
Thermistor
Load
(~1A)
Load
(~3A)
Load
(~450mA)
CE
Load
R5540K
(~450mA)
CE
Battery Power Line Switch
(Using as a Load Switch)
Load
(~3A)
Load
• USB High-side Switch
The functions of the USB high-side switch are mainly as follows:
•ON/OFF control of the USB power line
By an enable signal from the USB host controller, the USB highside
switch turns on USB power line smoothly with its soft-start
function and turns off to cut off the external low-side device.
• Protection of the USB power line
In addition to an abnormal over heat protection, when the USB
high-side switch detects an over current , it limits an over current
to a constant current or cuts off a USB power line by latch-off
protection function.
• USB High-side Switch Products Lineup
• Products partially available for automotive applications. Products for automotive applications may not provide all specifications of products for consumer applications.
Please refer to the "CAR ELECTRONICS PRODUCTS Catalog" for additional details.
Product
Name
ON
Resistance
Supply
Current
Operating
Voltage
Range
UVLO
Detect
Voltage
Current Limit
Threshold
Short
Current Limit Internal
FET
Reverse
Current
Protection
at OFF state
EN
R5524x Basic circuit example
Thermal
Shutdown
Protection Package Remarks
Typ. Typ. Min. Typ. Min. Typ.
R5520H 100mΩ 20μA 4.0V to 5.5V 2.2V — 1.2A 500mA 750mA Pch — H/L Constant current type SOT-89-5
R5523N • 130mΩ 20μA 2.2V to 5.5V 1.8V — 1A 500mA 750mA Pch — H/L Constant current type SOT-23-5
R5524x001A/B •
R5524x002A/B • 100mΩ 110μA 2.7V to 5.5V 2.4V 650mA 800mA Latch-off type/ DFN(PLP)1820-6
550mA 650mA Nch H
Constant current type SOT-23-5
R5524N004A • 1.25A 1.55A Constant current type SOT-23-5
VIN
VIN
Over Current
USB Host Controller
ON/OFF
10kΩ~100kΩ
4 FLG ∗ VIN
1
Warning
R5524x
3 EN GND
5
VOUT
2
Enable
Disable
1µF
VOUT
USB Client
47µF ∗2
VBUS
Device
*) FLG pin is N-channel open drain output.
*2) For the USB standard, the capacitor value of 120μF or more must be connected
with the output pin. But can be used about 47μF capacitor.
Auto-discharge
function selectable
• Rectifier Switch Products Lineup
In general, a diode is used as a protection when a battery is inserted in a reversed direction. However, the device is blocked to operate in this case and in normal case a power loss
occurs due to the forward voltage drop. When using the R5590x, a forward voltage drop does not occur and the device operates normaly regardless of the battery direction.
Product ON Resistance Supply Current Operating Voltage
Package
Name
Typ.
Typ.
Range
R5590x 0.6Ω (VIN=1.5V) 0.05µA (VIN=1.5V) 1.0V to 5.25V SOT-23-5, SON1612-6