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MAX8890ETCABK-MAX8890ETCAKM-MAX8890ETCDDD
3.3 V, integrated cellular RF-section power-management IC
General DescriptionThe MAX8890 is a power-management IC intended for
cellular handsets using a single lithium-ion (Li+) cell
battery with input voltages from +2.5V to +5.5V. The IC
contains three identical, low-noise, low-dropout (LDO)
linear regulators to provide all of the supply voltage
requirements for the RF portion of the handset.
The first LDO is intended to power the transmitter,
receiver, and synthesizer. The second LDO is intended
to power the TCXO, and high-power voltage-controlled
oscillators (VCOs). The third LDO is intended to power
the UHF offset VCO.
Each LDO has its own individual enable (ON/OFF) con-
trol to maximize design flexibility. The reference is pow-
ered on if any of the enable inputs (EN1, EN2, EN3) are
logic high. The high-accuracy output voltage of each
LDO is preset at an internally trimmed voltage (1.8V to
3.3V in 50mV increments). Each LDO is capable of sup-
plying 100mA with a low 50mV dropout and is opti-
mized for low noise and high crosstalk-isolation.
Designed with internal P-channel MOSFET pass transis-
tors, the MAX8890’s low 180µA operating supply cur-
rent is independent of load.
Other features include short-circuit and thermal-over-
load protection. The MAX8890 is available in a com-
pact, high-power, 12-pin 4mm ✕4mm QFN package
with a metal pad on the underside.
ApplicationsCellular Handsets
Single-Cell Li+ Systems
3-Cell NiMH, NiCD, or Alkaline Systems
Personal Digital Assistants (PDAs)
FeaturesThree 100mA Low-Dropout Linear RegulatorsLow 50mV Dropout Voltage at 100mA±1% Output Voltage Accuracy Over TemperaturePreset 1.8V to 3.3V Output Voltages
(in 50mV Increments)Low 45µVRMSOutput Voltage NoiseLow 180µA Operating Supply Current2.5V to 5.5V Input Voltage Range67dB PSRR10µVP-PChannel-to-Channel CrosstalkShort-Circuit ProtectionThermal-Overload Protection0.01µA Shutdown CurrentTiny 12-Pin 4mm x 4mm QFN Package
MAX8890
Integrated Cellular RF-Section
Power-Management IC
Ordering Information19-2075; Rev 2; 10/02
Standard Versions table and Pin Configuration appear at
end of data sheet.*Each preset output voltage of these devices is factory
trimmed to one of ten voltages. Replace “xyz” with the letters
corresponding to the desired output voltages (see Standard
Preset Output Voltage Suffixes table), where the three letter
suffix corresponds to the following output voltages: “x” =
VOUT1, “y” = VOUT2, and “z” = VOUT3.
Note:There are five standard versions available (see Standard
Versions table). Sample stock is generally held on standard
versions only. Standard versions have an order increment
requirement of 2500 pieces. Nonstandard versions have an
order increment requirement of 10,000 pieces. Contact the
factory for availability of nonstandard versions.
Standard Preset Output
Voltage Suffixesavailable in 50mV increments.
Typical Operating Circuit
MAX8890
Integrated Cellular RF-Section
Power-Management IC
ABSOLUTE MAXIMUM RATINGS
ELECTRICAL CHARACTERISTICS(VIN_ = 3.6V, EN_ = IN_, CIN= 6.8µF, COUT_ = 2.2µF, CBP= 0.01µF, all ceramic capacitors TA
= 0°C to +85°C, unless otherwiseStresses 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.
Note A:As long as the maximum continuous power dissipation rating is not exceeded, the output can be shorted indefinitely.
IN_, EN_ to GND.......................................................-0.3V to +6V
OUT_, BP to GND......................................-0.3V to (VIN_ + 0.3V)
Output Short-Circuit Protection (Note A).......................indefinite
Continuous Power Dissipation (TA= +70°C)
12-Pin 4 x 4 QFN (derate 16.9mW/°C above +70°C).......1349mW
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
MAX8890
Integrated Cellular RF-Section
Power-Management IC
ELECTRICAL CHARACTERISTICS(VIN_ = 3.6V, EN_ = IN_, CIN= 6.8µF, COUT_ = 2.2µF, CBP= 0.01µF, all ceramic capacitors TA
= -40°C to +85°C, unless otherwise
ELECTRICAL CHARACTERISTICS (continued)(VIN_ = 3.6V, EN_ = IN_, CIN= 6.8µF, COUT_ = 2.2µF, CBP= 0.01µF, all ceramic capacitors TA
= 0°C to +85°C, unless otherwisenoted. Typical values are at TA= +25°C.)
VIN_ = VOUT_ + 500mV). Since the minimum input voltage range is 2.5V, this specification is only meaningful when the set
output voltage exceeds 2.7V (VOUT_(NOM)≥2.7V).
Note 2:Specifications to -40°C are guaranteed by design, not production tested.
MAX8890
Integrated Cellular RF-Section
Power-Management IC
Typical Operating Characteristics(Circuit of Figure 1, MAX8890ETCGGG, VIN= 3.3V, EN_ = IN_, TA= +25°C, unless otherwise noted.)
MAX8890
Integrated Cellular RF-Section
Power-Management ICypical Operating Characteristics (continued)(Circuit of Figure 1, MAX8890ETCGGG, VIN= 3.3V, EN_ = IN_, TA= +25°C, unless otherwise noted.)
MAX8890
Integrated Cellular RF-Section
Power-Management IC
Typical Operating Characteristics (continued)(Circuit of Figure 1, MAX8890ETCGGG, VIN= 3.3V, EN_ = IN_, TA= +25°C, unless otherwise noted.)
