RP511x Series
0.3 µA I
Q
Ultra-low Quiescent Current 100 mA Buck DC/DC Converter
No. EA-502-180625
OVERVIEW
RP511x is a DC/DC converter featuring
0.3 μA
ultra-low operating quiescent current.
It is suitable for use in wearable and IoT devices that require miniaturization and long-lifetime of battery.
KEY BENEFITS
●
●
●
●
VFM (f
SW
up to 1 MHz) control achieves 0.3
μA
ultra-low operating quiescent current.
The wide range of V
IN
from 2.0 V to 5.5 V allows operation from coin cell to USB port.
Total mount area including C
IN
, C
OUT
, and inductor is 8.0 mm
2
.
Selectable packages including WLCSP, DFN, and SOT. 0.4 mm-thickness WLCSP package adaptable
to IC cards.
KEY SPECIFICATIONS
TYPICAL CHARACTERISTICS
V
OUT
= 1.8 V
100
80
•
•
•
•
•
V
IN
Output Current: 100 mA
Output Voltage Range:
1.0 V to 4.0 V (Settable in 0.1 V step)
Output Voltage Accuracy:
±1.5% (V
SET
≥
1.2 V), ±18 mV (V
SET
< 1.2 V)
Built-in Driver On-resistance (V
IN
= 3.6 V):
Typ. PMOS 0.15
Ω,
NMOS 0.15
Ω
(RP511Z)
Standby Current: 0.01 µA
TYPICAL APPLICATIONS
V
OUT
VIN
RP511x
C
IN
VOUT
LX
L
C
OUT
Efficiency [%]
60
40
20
0
0.001
0.01
0.1
1
I
OUT
[mA]
Vin=2.3V
Vin=3.6V
Vin=5.5V
10
100
SELECTION GUIDE
Product Name
Package
Q’ty per Reel
RP511Zxx1$-TR-F
RP511Kxx1$-TR
RP511Hxx1$-T1-FE
WLCSP-8-P1
DFN(PLP)2527-10
SOT-89-5
5,000 pcs
5,000 pcs
1,000 pcs
CE
GND
L: 2.2 µH, C
OUT
: 22 µF
PACKAGES
xx: Set output voltage (V
SET
)
Fixed Output Voltage Type:
1.0 V (10) to 4.0 V (40) in 0.1 V step.
$: Version
Version
A
B
Auto-discharge Function
No
Yes
V
SET
1.0 V to 4.0 V
WLCSP-8-P1
1.45 mm x 1.48 mm,
t=0.4mm (max.)
DFN(PLP)2527-10
2.7mm x 2.5 mm,
t=0.6mm (max.)
SOT-89-5
4.5mm x 4.35mm,
t=1.6mm (max.)
•
•
•
•
APPLICATIONS
Wearable equipment such as SmartWatch, SmartBand, and health monitoring
Li-ion battery-used equipment, Coin cell-used equipment
Low power RF such as
Bluetooth
®
Low Energy, Zigbee, WiSun, and ANT
Low power CPU, memory, sensor devices, and energy harvesting
1
RP511x
No. EA-502-180625
SELECTION GUIDE
The set output voltage, the output voltage type, the auto-discharge function
(1)
, and the package for the ICs are
user-selectable options.
Selection Guide
Product Name
RP511Zxx1$-TR-F
RP511Kxx1$-TR
RP511Hxx1$-T1-FE
Package
WLCSP−8−P1
DFN(PLP)2527-10
SOT-89-5
Quantity per Reel
5,000 pcs
5,000 pcs
1,000 pcs
Pb Free
Yes
Yes
Yes
Halogen Free
Yes
Yes
Yes
xx: Designation of the set output voltage (V
SET
)
For Fixed Output Voltage Type
(2)
: 1.0 V (10) to 4.0 V (40) in 0.1 V step
$: Designation of Version
Version
A
B
Auto-discharge Function
Disable
Auto-discharge
V
SET
1.0 V to 4.0 V
(1)
Auto-discharge function quickly lowers the output voltage to 0 V, when the chip enable signal is switched from the active
mode to the standby mode, by releasing the electrical charge accumulated in the external capacitor.
(2)
The customization of specifying in 0.05 V step is available.
2
RP511x
No. EA-502-180625
PIN DESCRIPTION
Top View
3
2
1
A
B
C
3
2
1
C
B
A
Bottom View
RP511Z (WLCSP-8-P1) Pin Configuration
Top View
10
9
8
7
6
Bottom View
6
7
8
9
10
5
4
(1)
1
2
3
4
5
5
4
3
2
1
1
1
2
3
RP511K [DFN(PLP)2527-10] Pin Configuration
RP511H (SOT-89-5)
Pin Configuration
RP511Z Pin Description
Pin No.
A1
B1
C1
A2
C2
A3
B3
C3
Symbol
VIN
VIN
LX
VOUT
GND
CE
GND
GND
Input Pin
Input Pin
Switching Pin
Output voltage Pin
Ground Pin
Chip Enable Pin (Active-high)
Ground Pin
Ground Pin
Description
(1)
The tab on the bottom of the package enhances thermal performance and is electrically connected to GND (substrate
level). It is recommended that the tab be connected to the ground plane on the board, or otherwise be left floating.
4
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