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L4200 22uH 2.6x2.8x1.2 0.33A 0.76ohm 1000-0130
N1211, N2206 IC Vreg PLP1820-6 1204-5903
APPENDIX
Components - L4200, N1210, N1211, N2206
N1210 IC Lin WLP-16 1203-5870
Pin Configuration
TOP VIEW
REFBP
AGND
REFIN
A1
A2
A3
LDO2
PA_EN
EN2
B1
B2
B3
IN2
HP
IN1B
C1
C2
C3
LDO1
EN1
PAB
D1
D2
D3
(BUMP IN BOTTOM)
×
16-Bump, 2mm
2mm WLP
Pin Description
PIN
NAME
Reference Noise Bypass. Bypass REFBP to AGND with a 0.22μF ceramic capacitor to reduce noise on the
A1
REFBP
LDO outputs. REFBP is internally pulled down through a 1k
A2
AGND
Low-Noise Analog Ground
DAC-Controlled Input. The output of the PA step-down converter is regulated to 2 x V
A3
REFIN
reaches 0.465 x V
A4
PGND
Power Ground for PA Step-Down Converter
200mA LDO Regulator 2 Output. Bypass LDO2 with a 1μF ceramic capacitor as close as possible to LDO2
B1
LDO2
and AGND. LDO2 is internally pulled down through a 1k
PA Step-Down Converter Enable Input. Connect to IN_ or logic-high for normal operation. Connect to GND
B2
PA_EN
or logic-low for shutdown mode.
LDO2 Enable Input. Connect to IN2 or logic-high for normal operation. Connect to AGND or logic-low for
B3
EN2
shutdown mode.
B4
LX
Inductor Connection. Connect an inductor from LX to the output of the PA step-down converter.
Supply Voltage Input for LDO1, LDO2, and Internal Reference. Connect IN2 to a battery or supply voltage
C1
IN2
from 2.7V to 5.5V. Bypass IN2 with a 2.2μF ceramic capacitor as close as possible to IN2 and AGND.
Connect IN2 to the same source as IN1A and IN1B.
High-Power Mode Set Input. Drive HP high to invoke forced bypass mode. Bypass mode connects the
C2
HP
input of the PA step-down converter directly to its output through the internal bypass MOSFET. Drive HP
low to disable the forced bypass mode.
Supply Voltage Input for PA Step-Down Converter. Connect IN1_ to a battery or supply voltage from 2.7V to
IN1B,
C3, C4
5.5V. Bypass the connection of IN1_ with a 2.2μF ceramic capacitor as close as possible to IN1_, and
IN1A
PGND. IN1A and IN1B are internally connected together. Connect IN1_ to the same source as IN2.
200mA LDO Regulator 1 Output. Bypass LDO1 with a 1μF ceramic capacitor as close as possible to LDO1
D1
LDO1
and AGND. LDO1 is internally pulled down through a 1k
LDO1 Enable Input. Connect to IN2 or logic-high for normal operation. Connect to AGND or logic-low for
D2
EN1
shutdown mode.
PA Connection for Bypass Mode. Internally connected to IN1_ using the internal bypass MOSFET during
D3, D4
PAB, PAA
bypass mode. PA_ is connected to the internal feedback network. Bypass PA_ with a 2.2
capacitor as close as possible to PA_ and PGND.
T ypical Operating Circuit
PGND
BATT
2.7V TO 5.5V
IN1A
A4
IN1B
2.2μF
LX
B4
PA ON/OFF
PA_EN
REFIN
IN1A
ANALOG CONTROL
FORCED BYPASS
HP
C4
LDO1 ON/OFF
EN1
PAA
LDO2 ON/OFF
EN2
BATT
D4
2.7V TO 5.5V
IN2
FUNCTION
Ω resistor during shutdown.
, bypass mode is enabled.
IN2
Ω resistor when this regulator is disabled.
Ω resistor when this regulator is disabled.
SEMC Troubleshooting Manual
C903
V
PA
0.4V TO V
BATT
PAA
PAB
LX
1μH
2.2μF
PGND
REFBP
AGND
LDO1
V
UP
LDO1
TO 200mA
LDO2
V
UP
LDO2
TO 200mA
. When V
REFIN
REFIN
μF ceramic
1228-1147 rev. 1
109
(129)
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Troubleshooting
