PCA9411; PCA9411A
3.0 MHz, 500 mA, DC-to-DC boost converter
Rev. 1.1 — 5 August 2016
Product data sheet
1. General description
The PCA9411 and PCA9411A are highly efficient 3.0 MHz, 500 mA, step-up DC-to-DC
converters. They convert input voltages from 2.5 V to 5.25 V to a fixed output voltage of
5.25 V.
These devices are optimized for battery-powered applications. High efficiency of up to
94 % enables an extended battery life in all portable designs. Step-up operation at a
switching frequency of 3 MHz allows using 1
H
inductor or smaller.
2. Features and benefits
Efficiency up to 94 %
3 % output voltage accuracy at nominal and static conditions
3 % output voltage accuracy over full current, voltage and temperature range
V
IN
V
O
, (Pass-Through Mode Operation)
Load disconnect
Current-mode controller
Soft start function for limiting inrush current with true load disconnect
Overcurrent and over-temperature protection
The PCA9411 totally disconnects input to output when disabled
The PCA9411A connects input to output when disabled
Wafer-Level Chip-Size Package (WLCSP) with 0.4 mm pitch; allows for the use of a
smaller antenna, or for greater signal strength
I
OUT
400 mA at V
IN
= 2.5 V
I
OUT
480 mA at V
IN
= 3.6 V
I
OUT
640 mA at V
IN
= 4.8 V
I
OUT
700 mA at V
IN
= 5.0 V
3. Applications
Smartphones
NFC terminals
NXP Semiconductors
PCA9411/9411A
3.0 MHz, 500 mA, DC-to-DC boost converter
4. Ordering information
Table 1.
Ordering information
Topside Package
mark
Name
P11
11A
WLCSP9
WLCSP9
Description
wafer-level chip-size package; 9 bumps; body 1.24
1.24
0.525 mm
wafer-level chip-size package; 9 bumps; body 1.24
1.24
0.525 mm
Version
-
-
Type number
PCA9411UK
PCA9411AUK
4.1 Ordering options
Table 2.
Ordering options
Orderable part
number
PCA9411UKZ
Package
WLCSP9
Packing method
REEL 7" Q1/T1
*SPECIAL MARK
CHIPS DP
REEL 7" Q1/T1
*SPECIAL MARK
CHIPS DP
Minimum
Temperature
order quantity
3000
T
amb
=
40 C
to +85
C
Type number
PCA9411UK
PCA9411AUK
PCA9411AUKZ
WLCSP9
3000
T
amb
=
40 C
to +85
C
PCA9411
All information provided in this document is subject to legal disclaimers.
© NXP Semiconductors N.V. 2016. All rights reserved.
Product data sheet
Rev. 1.1 — 5 August 2016
2 of 28
NXP Semiconductors
PCA9411/9411A
3.0 MHz, 500 mA, DC-to-DC boost converter
5. Block diagram
BANDGAP
REFERENCE
BIAS
SUPPLY
UNDERVOLTAGE
LOCKOUT
CONTROL
LOGIC
OVERCURRENT
PROTECTION
TEMPERATURE
WATCHDOG
PULSE
GENERATOR
GATE
DRIVER
SOFTSTART
aaa-013240
Fig 1.
Block diagram
6. Pinning information
6.1 Pinning
PCA9411/9411A
ball A1
index area
A
1
2
3
PCA9411/9411A
1
A
VOUT
2
VOUT
3
VIN
B
B
SW
SW
EN
C
aaa-016560
C
PGND
PGND
AGND
aaa-016561
Transparent top view
Transparent top view
Fig 2.
PCA9411
Pin configuration WLCSP9 package
Fig 3.
Ball mapping for WLCSP9
© NXP Semiconductors N.V. 2016. All rights reserved.
All information provided in this document is subject to legal disclaimers.
Product data sheet
Rev. 1.1 — 5 August 2016
3 of 28
NXP Semiconductors
PCA9411/9411A
3.0 MHz, 500 mA, DC-to-DC boost converter
6.2 Pin description
Table 3.
Symbol
VOUT
VIN
SW
EN
Pin description
Pin
A1, A2
A3
B1, B2
B3
Description
Output voltage. This pin is the output voltage terminal; connect
directly to C
OUT
.
Input voltage. Connect to Li-Ion battery input power source.
Switching node. Connect to inductor.
Enable. Used to enable/disable the device; HIGH = enabled.
Non-A version: EN low = total disconnect
A version: EN low = forced pass through
PGND
AGND
C1, C2
C3
Power ground. This is the power return for the IC. C
OUT
capacitor
should be returned with the shortest path possible to these pins.
Analog ground. This is the signal ground reference for the IC. All
voltage levels are measured with respect to this pin; connect to
PGND at a single point. The AGND pin should be flooded over by
the ground plane that is connecting the PGND pins to both the
input caps and the output caps.
PCA9411
All information provided in this document is subject to legal disclaimers.
© NXP Semiconductors N.V. 2016. All rights reserved.
Product data sheet
Rev. 1.1 — 5 August 2016
4 of 28
NXP Semiconductors
PCA9411/9411A
3.0 MHz, 500 mA, DC-to-DC boost converter
7. Functional description
The step-up converter (Figure
4)
generates a regulated constant output voltage.
L
i(ext)
SW SW
VOUT
VOUT
VIN
C
1
VIN
C
2
VOUT
Enable
EN
AGND PGND PGND
aaa-013259
Fig 4.
Typical DC-to-DC application
7.1 Enable (EN) pin
EN pin enables the boost converter when HIGH. However the effect of the EN when LOW
has two methods of operation, depending on which device is used.
PCA9411 device: the EN pin when LOW causes the part to go into a total disconnect
mode from input to output.
PCA9411A device: EN pin when LOW forces the part into Pass Through mode where the
output voltage is the same as the input voltage. This device emulates a conventional
boost converter (without the voltage drop of the internal diode).
When the EN pin is pulled HIGH it should be held HIGH for at least 500
s
for the device
to properly initialize. This is for getting the forced Pass Through mode set up properly.
Shorter pulses may cause unpredictable behavior.
Table 4.
Mode
LIN
SS
BST
PT
Operating modes
Description
linear start-up
boost soft-start
boost operating mode
pass-through mode
Invoked when
V
IN
> V
OUT
V
IN
< V
OUT
< V
OUT(TARGET)
V
OUT
= V
OUT(TARGET)
V
IN
> V
OUT(TARGET)
or in the advanced
part when EN is pulled LOW
7.1.1 Pass-Through (PT) mode
With both devices, the device automatically transitions from Boost Mode to Pass-Through
Mode if V
IN
goes above the V
OUT
target. In Pass-Through Mode, the device provides a
very low impedance path from V
IN
to V
OUT
. Entry to the Pass-Through Mode is triggered
PCA9411
All information provided in this document is subject to legal disclaimers.
© NXP Semiconductors N.V. 2016. All rights reserved.
Product data sheet
Rev. 1.1 — 5 August 2016
5 of 28
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