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19-1489; Rev 0; 12/00
GSM Cellular/PCN Handset RF Power
Management IC
General Description
The MAX1727 is a radio frequency (RF) power-man-
agement IC intended for Global Satellite Mobile (GSM)
communication cellular and personal cellular network
(PCN) handsets using a single lithium-ion (Li+) cell bat-
tery with inputs from +3.1V to +5.5V. The IC contains
four low-noise, low-dropout (LDO) linear regulators to
provide all the supply voltage requirements for the RF
portion of the handset, and two high-speed, wide-band-
width op amps for the power amplifier (PA) power con-
trol loop.
Each LDO has its own individual on/off control to maxi-
mize design flexibility. All LDOs are internally trimmed
to a fixed output voltage and are optimized for low
noise and high crosstalk isolation. LDO1 (R1OUT) is
rated for 100µA and is optimized for lowest quiescent
current. It is intended to power the transmitter, receiver,
and synthesizer. LDO2 (R2OUT) is rated for 50mA. It is
intended to power the TCXO, GSM, and PCN high-
power voltage-controlled oscillators (VCOs). LDO3
(R3OUT) is rated for 20mA and is optimized to sup-
press line transients. It is intended to power the UHF
offset VCO. LDO3 has an auxiliary 2.5switched out-
put to allow the VCO to be powered up with precise
timing. LDO4 (R3BYP) is rated for 20mA. It is intended
to power this IC’s reference and LDO3 for superior line
rejection. LDO4 and the reference will be powered on if
any of the R1EN, R2EN, and R3EN enable inputs are
logic high.
The op amps have wide bandwidth, high DC accuracy,
high slew rate, and Rail-to-Rail® inputs and outputs.
The op amps can sink and source 3mA, and include
two 2.5switched outputs. The op amps and switched
outputs may be used independently or may be config-
ured to provide optimized power for a PA control loop.
Applications
GSM Cellular or PCN Handsets
Single-Cell Li+ Systems
3-Cell NiMH, NiCD, or Alkaline Systems
Typical Application Circuit and Functional Diagram appear
at end of data sheet.
Rail-to-Rail is a registered trademark of Nippon Motorola, Ltd.
Features
o +3.1V to +5.5V Input Range
o One 2.90V, 100mA Low IQ LDO
o One 2.75V, 50mA Low IQ LDO
o One 2.75V, 20mA Low IQ LDO
o Low-Noise LDOs
<90µVRMS from 10Hz to 100kHz
>80dB Crosstalk Isolation at 10kHz
>70dB PSRR at 1kHz
o ±5% Accuracy Over Line, Load, and Temperature
o Three 2.5Switched Outputs
o Current and Thermal Limit
o Two Undedicated Op Amps
Rail-to-Rail CMR Inputs and Outputs
>120dB Channel Separation
>85dB PSRR at 1kHz
o 10µA (max) Shutdown Current
PART
MAX1727EUG
Ordering Information
TEMP. RANGE
-40°C to +85°C
PIN-PACKAGE
24 TSSOP
Pin Configuration
R3EN 1
PCEN 2
PC1+ 3
PC1- 4
PC1OUT 5
VPC 6
PC2OUT 7
PC2- 8
PC2+ 9
PCNAPC 10
BANDSWIN 11
GSMAPC 12
MAX1727
TSSOP
24 GND
23 CBYP
22 ENVCO
21 VCOOUT
20 R3OUT
19 R3BYP
18 R1OUT
17 VCC
16 R2OUT
15 R2EN
14 R1EN
13 GSM/PCN
________________________________________________________________ Maxim Integrated Products 1
For price, delivery, and to place orders, please contact Maxim Distribution at 1-888-629-4642,
or visit Maxim’s website at www.maxim-ic.com.

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GSM Cellular/PCN Handset RF Power
Management IC
ABSOLUTE MAXIMUM RATINGS
VCC, VPC to GND......................................................-0.3V to +7V
PC1-, PC1+, PC2-, PC2+ to GND ............................-0.3V to +7V
GSM/PCN, BANDSWIN to GND ...............................-0.3V to +7V
PC1OUT, PC2OUT to GND ......................................-0.3V to +7V
R1OUT, R2OUT, R3BYP to GND................-0.3V to (VCC + 0.3V)
R3OUT, CBYP to GND ..........................-0.3V to (VR3BYP + 0.3V)
R1EN, R2EN, R3EN, ENVCO,
PCEN to GND ..........................................-0.3V to (VCC + 0.3V)
VCOOUT to GND ..................................-0.3V to (VR3OUT + 0.3V)
GSMAPC, PCNAPC to GND ...........-0.3V to (VBANDSWIN + 0.3V)
Continuous Power Dissipation (TA = +70°C)
24-Pin TSSOP (derate 12.2mW/°C above +70°C) ......975mW
Operating Temperature Range ...........................-40°C to +85°C
Junction Temperature ......................................................+150°C
Storage Temperature Range .............................-65°C to +150°C
Lead Temperature(soldering, 10s) ..................................+300°C
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.
ELECTRICAL CHARACTERISTICS
(VCC = +3.1V to +5.5V, VPC = +2.8V to +5.5V, GND = 0, CBYP = 0.01µF, TA = 0°C to +85°C, unless otherwise noted. Typical values
are at TA = +25°C.)
PARAMETER
CONDITIONS
MIN TYP MAX UNITS
VCC Operating Voltage
3.1 5.5 V
VPC Operating Voltage
2.8 5.5 V
UVLO Falling
VCC falling
2.3 2.4
V
UVLO Rising
VCC rising
2.5 2.62
V
SUPPLY CURRENT
Supply Current in Shutdown
All regulators and op amps off, VCC = +3.6V
0.01 10
µA
VCC + VPC Supply Current
All regulators and op amps on, VCC = VPC
1.80 3.0
mA
REFERENCE
Reference Bypass Output
REF Supply Rejection
ICBYP = 0, do not draw current from this pin
+3.1V VCC +5.5V
1.225 1.250 1.275
0.2 5
V
mV
REGULATOR R1
R1OUT Output Voltage
0.1mA IR1OUT 100mA
2.80 2.90 3.00
V
Dropout Voltage
IR1OUT = 1mA
IR1OUT = 100mA
1
100 225
mV
Load Regulation
Line Regulation
0.1mA IR1OUT 100mA
+3.1V VCC +5.5V, IR1OUT = 10mA
8 45 mV
0.5 10 mV
R1OUT Leakage Current
R1EN, R1OUT = 0, VCC = +5.5V
2 µA
REGULATOR R2
R2OUT Output Voltage
0.1mA IR2OUT 50mA
2.61 2.75 2.90
V
Dropout Voltage
IR2OUT = 1mA
IR2OUT = 50mA
1
100 225
mV
Load Regulation
Line Regulation
0.1mA IR2OUT 50mA
+3.1V VCC +5.5V, IR2OUT = 10mA
8 45 mV
0.5 10 mV
R2OUT Leakage Current
R2EN, R2OUT = 0, VCC = +5.5V
2 µA
REGULATOR R3
R3OUT Output Voltage
0.1mA IR3OUT 20mA
2.61 2.75 2.90
V
Dropout Voltage
IR3OUT = 1mA
IR3OUT = 20mA
1
mV
45 100
2 _______________________________________________________________________________________

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GSM Cellular/PCN Handset RF Power
Management IC
ELECTRICAL CHARACTERISTICS (continued)
(VCC = +3.1V to +5.5V, VPC = +2.8V to +5.5V, GND = 0, CBYP = 0.01µF, TA = 0°C to +85°C, unless otherwise noted. Typical values
are at TA = +25°C.)
PARAMETER
CONDITIONS
Load Regulation
0.1mA IR3OUT 20mA
Line Regulation
+3.1V VCC +5.5V, IR3OUT = 10mA
R3OUT Leakage Current
R3EN, R3OUT = 0, VCC = +5.5V
VCOOUT SWITCH (R3 SWITCH)
On-Resistance
REGULATOR R4 (R3BYP)
R3BYP Output Voltage
0.1mA IR3BYP 20mA
Dropout Voltage
Load Regulation
IR3BYP = 1mA
IR3BYP = 20mA
0.1mA IR3BYP 20mA
Line Regulation
+3.1V VCC +5.5V, IR3BYP = 10mA
R3BYP Leakage Current
R1EN, R2EN, R3EN = 0, R3BYP = 0, VCC = +5.5V
PA CONTROL OP AMPS (PC1, PC2)
Input Offset Voltage
Input Bias Current
VCM = +0.3V to (VPC - 0.3V)
Input Bias Current
Shutdown Mode
VCM = 0 to VCC,
VPC = 0, PCEN = GND
Input Offset Current
MIN TYP MAX UNITS
5 45 mV
0.2 10 mV
2 µA
2.4 5.1
2.85
2.95
1
45
10
0.7
3.05
100
45
10
2
V
mV
mV
mV
µA
2 mV
150 nA
5 µA
30 nA
Input Common-Mode Range
0.3
VPC -
0.3
V
Gain-Bandwidth Product
RLOAD = 1kconnected to VPC/2, CLOAD = 100pF to
GND
4 MHz
Slew Rate
PSRR
10Hz f 1kHz
CMRR
10Hz f 1kHz
Output Voltage Swing
ILOAD = ±3 mA
BAND SWITCH (GSMAPC, PCNAPC)
On-Resistance GSMAPC
On-Resistance PCNAPC
0.3V < VGSMAPC < VPC - 0.3V, ILOAD = ±3 mA
0.3V < VPCNAPC < VPC - 0.3V, ILOAD = ±3 mA
LOGIC AND CONTROL INPUTS (R1EN, R2EN, R3EN, ENVCO, GSM/PCN, PCEN)
Input Low Level
Input High Level
Logic Input Current
0 < VIN < +5.5V
THERMAL SHUTDOWN (R3 SWITCH)
Threshold Rising
Hysteresis
IOUT = 1mA
1 V/µs
85 dB
80 dB
0.2 2.62 V
2.2 5
2.2 5
0.4 V
2.0 V
1 µA
150 °C
20 °C
_______________________________________________________________________________________ 3

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GSM Cellular/PCN Handset RF Power
Management IC
ELECTRICAL CHARACTERISTICS
(VCC = +3.1V to +5.5V, VPC = +2.8V to +5.5V, GND = 0, CBYP = 0.01µF, TA = -40°C to +85°C, unless otherwise noted.) (Note 1)
PARAMETER
VCC Operating Voltage
VPC Operating Voltage
UVLO Falling
UVLO Rising
SUPPLY CURRENT
Supply Current in Shutdown
VCC Supply Current
REFERENCE
Reference Bypass Output
REF Supply Rejection
REGULATOR R1
R1OUT Output Voltage
Dropout Voltage
Load Regulation
Line Regulation
R1OUT Leakage Current
REGULATOR R2
R2OUT Output Voltage
Dropout Voltage
Load Regulation
Line Regulation
R2OUT Leakage Current
REGULATOR R3
R3OUT Output Voltage
Dropout Voltage
Load Regulation
Line Regulation
R3OUT Leakage Current
VCOOUT SWITCH (R3 SWITCH)
On-Resistance
REGULATOR R4 (R3BYP)
R3BYP Output Voltage
Dropout Voltage
Load Regulation
Line Regulation
R3BYP Leakage Current
CONDITIONS
VCC falling
VCC rising
All regulators and op amps off, VCC = +3.6V
All regulators and op amps on
ICBYP = 0, do not draw current from this pin
+3.1V VCC +5.5V
0.1mA IR1OUT 100mA
IR1OUT = 100mA
0.1mA IR1OUT 100mA
+3.1V VCC +5.5V, IR1OUT = 10mA
R1EN, R1OUT = 0, VCC = +5.5V
0.1mA IR2OUT 50mA
IR2OUT = 50mA
0.1mA IR2OUT 50mA
+3.1V VCC +5.5V, IR2OUT = 10mA
R2EN, R2OUT = 0, VCC = +5.5V
0.1mA IR3OUT 20mA
IR3OUT = 20mA
0.1mA IR3OUT 20mA
+3.1V VCC +5.5V, IR3OUT = 10mA
R3EN, R3OUT = 0, VCC = +5.5V
0.1mA IR3BYP 20mA
IR3BYP = 20mA
0.1mA IR3BYP 20mA
+3.1V VCC +5.5V, IR3BYP = 10mA
R1EN, R2EN, R3EN = 0, R3BYP = 0, VCC = +5.5V
MIN
3.1
2.8
2.3
1.219
2.80
2.61
2.61
2.85
MAX
5.5
5.5
2.62
UNITS
V
V
V
V
10 µA
3.0 mA
1.281
5
V
mV
3.00
225
45
10
2
V
mV
mV
mV
µA
2.90
225
45
10
2
V
mV
mV
mV
µA
2.90
100
45
10
2
V
mV
mV
mV
µA
5.1
3.05
100
45
10
2
V
mV
mV
mV
µA
4 _______________________________________________________________________________________

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GSM Cellular/PCN Handset RF Power
Management IC
ELECTRICAL CHARACTERISTICS (continued)
(VCC = +3.1V to +5.5V, VPC = +2.8V to +5.5V, GND = 0, CBYP = 0.01µF, TA = -40°C to +85°C, unless otherwise noted.) (Note 1)
PARAMETER
CONDITIONS
PA CONTROL OP AMPS (PC1, PC2)
Input Offset Voltage
Input Bias Current
VCM = 0.3V to (VPC - 0.3V)
Input Bias Current
Shutdown Mode
VCM = 0 to VCC,
VPC = 0, PCEN = GND
Input Offset Current
Input Common-Mode Range
Output Voltage Swing
ILOAD = ±3 mA
BAND SWITCH (GSMAPC, PCNAPC)
On-Resistance GSMAPC
0.3V < VGSMAPC < VPC- 0.3V, ILOAD = ±3 mA
On-Resistance PCNAPC
0.3V < VPCNAPC < VPC- 0.3V, ILOAD = ±3 mA
LOGIC AND CONTROL INPUTS (R1EN, R2EN, R3EN, ENVCO, GSM/PCN, PCEN)
Input Low Level
Input High Level
Logic Input Current
0 < VIN < +5.5V
MIN TYP MAX UNITS
2
150 nA
5 µA
30 nA
0.3
VPC
- 0.3
V
0.2 2.62 V
5
5
0.4 V
2.0 V
1 µA
Note 1: Specifications to -40°C are guaranteed by design, not production tested.
(TA = +25°C, unless otherwise noted.)
1.4
1.2
1.0
0.8
0.6
0.4
0.2
0
0
GROUND CURRENT
vs. SUPPLY VOLTAGE
FULL LOAD*
NO LOAD*
*ALL REGULATORS ON
12 34
SUPPLY VOLTAGE (V)
5
Typical Operating Characteristics
1.135
1.130
1.125
1.120
1.115
1.110
1.105
1.100
0
GROUND CURRENT
vs. LOAD CURRENT
LDO3
LDO1
LDO2
VCC = +3.6V
20 40 60 80
LOAD CURRENT (mA)
100
OUTPUT VOLTAGE
vs. SUPPLY VOLTAGE
2.95
2.90
LDO1
2.85
2.80 LDO3
2.75
LDO2
2.70
2.65
2.7
3.2 3.7 4.2 4.7
SUPPLY VOLTAGE (V)
5.2
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