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Part: MAX1799EUP
Category:
Power Management
-> Battery Management
Description: MAX1798, MAX1798A, MAX1799, MAX1799A Cdma Cellular/pcs System Power Supplies
Company: Maxim Integrated Products
Datasheet: Download MAX1799EUP datasheet File size : 390 kB
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Datasheet text preview:
19-1655; Rev 1; 2/01
UAL IT MAN TION K E VALUA E BL AVAILA
CDMA Cellular/PCS System Power Supplies
Features
o One 300mA Low-Noise LDO o Four 150mA Low-Noise LDOs o 45µVRMS Noise from 10Hz to 100kHz o >60dB Crosstalk Isolation Below 10kHz o >60dB PSRR Below 10kHz o 125mV (max) Dropout (OUT1 at 200mA) o 100mV (max) Dropout (OUT25 at 100mA) o Programmable Output Voltages 1.8V to 3.3V in 32 Steps o 140ms (min) Reset Timer o SPI- or I2C-Compatible Serial Interface o Push-On/Push-Off Control Logic o Two 150mA General Purpose Open-Drain Outputs o Overcurrent and Thermal Protection (all LDOs) o 1µA Shutdown Current o 20-Pin Thermally-Enhanced TSSOP or QFN Packages
General Description
The MAX1798/MAX1798A/MAX1799/MAX1799A system power supplies are designed specifically for CDMA cell u l a r / P C S handsets. Each device contains five lowdropout linear regulators (LDOs), a 140ms (min) reset timer, a serial interface, push-on/push-off control logic, and two general-purpose open-drain outputs. Only the s e r i a l interface is different between the MAX1798/ M A X 1 7 9 8 A / M A X 1 7 9 9 / M A X 1 7 9 9 A : the MAX1798/ MAX1798A feature an SPITM-compatible serial interface, and the MAX1799/MAX1799A feature an I2CTM-compatible interface. The "A" parts have a -13% reset threshold, the non-A parts have a 9.5% threshold. The "A" parts have a 175 delay on a reset-triggered shutdown, the non-A shutdown instantly. Each linear regulator features extremely low dropout voltage, specified at two-thirds of the maximum output current. LDO1 is rated for 300mA, while LDOs 25 are each rated for 150mA. All LDOs are optimized for low n o i s e and isolation. Each LDO can be individually enabled and disabled through the serial port, as well as individually programmed to any of 32 voltages from 1.8V to 3.3V. The MAX1798/MAX1798A/MAX1799/MAX1799As' wide 2.5V to 5.5V input voltage range makes them compatible with a wide range of input supplies, including a sing l e lithium-ion (Li+) cell battery. Both devices are available in thermally-enhanced 20-pin TSSOP and QFN exposed pad (EP) packages. Evaluation kits in TSSOP (MAX1798EVKIT and MAX1799EVKIT) are available to facilitate designs.
MAX1798/MAX1798A/MAX1799/MAX1799A
Applications
CDMA Cellular/PCS Handsets PDAs, Palmtops, and Handy-Terminals Single-Cell Li+ Systems 2- or 3-Cell NiMH, NiCd, or Alkaline Systems
Typical Operating Circuit
ONO IN4/5 2.5V TO 5.5V OFF IN2/3 OUT1 IN1 RSO ON RESET TX RX BBA AUDIO OR PLL + VCO VIN1 DR1 DR2 GND PGND VIBRATOR WDOUT VCC IRQ MSM CONTROLLER
Ordering Information
PART MAX1798EGP MAX1798EUP MAX1798AEGP MAX1798AEUP TEMP RANGE -40°C to +85°C -40°C to +85°C -40°C to +85°C -40°C to +85°C PINPACKAGE 20 QFN 20 TSSOP-EP 20 QFN 20 TSSOP-EP INTERFACE SPI SPI SPI SPI
MAX1798 MAX1798A* MAX1799 MAX1799A*
OUT2 OUT3 OUT4 OUT5
CS (AS) SPI OR I 2C SCLK (SCK) DIN (SDA) BP 0.01µF
Ordering Information continued and Pin Configurations appear at end of data sheet.
BACKLIGHT ( ) ARE FOR MAX1799/MAX1799A. *-13% RESET THRESHOLD AND SHUTDOWN RESET TIMER ADDED.
SPI is a trademark of Motorola, Inc. I2C is a trademark of Philips Corp. 1
________________________________________________________________ Maxim Integrated Products
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at 1-888-629-4642, or visit Maxim's website at www.maxim-ic.com.
CDMA Cellular/PCS System Power Supplies MAX1798/MAX1798A/MAX1799/MAX1799A
ABSOLUTE MAXIMUM RATINGS
OFF, DR1, DR2 to GND...........-0.3V to +6V IN1, IN2/3, IN4/5, DIN (SDA) to GND .....-0.3V to +6V SCLK (SCK), BP, ON to GND..-0.3V to +6V RSO, ONO to GND .........-0.3V to (VOUT1 + 0.3V) PGND to GND............±0.3V OUT1, CS (AS) to GND ......-0.3V to (VIN1 + 0.3V) OUT2, OUT3 to GND.......-0.3V to (VIN2/3 + 0.3V) OUT4, OUT5 to GND.......-0.3V to (VIN4/5 + 0.3V) Continuous Sink Current DR1, DR2......100mARMS RSO ........25mA Continuous Power Dissipation (TA = +70°C) 20-Pin QFN (derate 20mW/°C above +70°C) ........1.6W 20-Pin TSSOP (derate 26mW/°C above +70°C) ....2.1W 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
(VIN1 = VIN2/3 = VIN4/5 = VSCLK (SCK) = VDIN (SDA) = V CS (AS) = V OFF = 3.6V; ON = GND = PGND = 0; RSO, ONO, DR1, DR2 = open; BP bypassed with 0.01µF, OUT1 bypassed with 4.7µF; OUT2, OUT3, OUT4, OUT5 bypassed with 2.2µF; OUT15 set to 2.98V, TA = 0°C to +85°C, unless otherwise noted. Typical values are at TA = +25°C.) PARAMETER IN1, IN2/3, IN4/5 Operating Voltage Undervoltage Lockout IN1 Undervoltage Lockout IN2/3 Undervoltage Lockout IN4/5 Power-On Reset Threshold Supply Current in Shutdown Supply Current (Standby) Supply Current (All Outputs On) BP Voltage BP Supply Rejection OUT1 REGULATOR Output Accuracy Output Accuracy (Line and Load) Nominal Voltage Adjust Range Dropout Voltage Load Regulation Line Regulation Current Limit Output-Discharge Switch Resistance in Shutdown OUT1 Reset Threshold
Output Voltage Noise
SYMBOL
CONDITIONS
MIN 2.5
TYP
MAX 5.5
UNITS V V V V V µA µA µA V mV % % V mV %/mA
VUVLO-1 VUVLO-2/3 VUVLO-4/5 ISHDN ION
IN1 rising edge IN2/3 rising edge IN4/5 rising edge IN1 falling edge OFF = 0, ON = IN1 OUT1 ON, other regulators OFF IOUT1 = 0 All regulators ON, IOUT_ = 0 IBP 1nA 2.5V VIN1 5.5V IOUT1 = 70mA (Note 3) 1mA IOUT1 300mA, 2.5V VIN1 5.5V, VOUT1 = 1.8V (Note 3) 32 steps through serial interface; Tables 2, 3 IOUT1 = 1mA (Notes 1, 3) IOUT1 = 200mA (Notes 1, 3) 0.1mA IOUT1 300mA 2.5V VIN1 5.5V, VOUT1 = 1.8V (Note 3)
2.10 2.10 2.10 0.9
2.30 2.30 2.30 1 113 367
2.45 2.45 2.45 2.1 10 230 680 1.269 5 2 3 3.3
1.231
1.250 0.2
-2 -3 1.8 1 73 -0.003 -0.15 320 -0.03 500 25 -9.5 -15 -7.5 -13
125 0.11 850 300 -5.5 -11
%/V mA %
Regulator output turned off OUT1 rising and falling (MAX1798/MAX1799)
(MAX1798A/MAX1799A) f = 10Hz to 100kHz, COUT = 4.7µF
45
µVRMS
2
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CDMA Cellular/PCS System Power Supplies
ELECTRICAL CHARACTERISTICS (continued)
(VIN1 = VIN2/3 = VIN4/5 = VSCLK (SCK) = VDIN (SDA) = V CS (AS) = V OFF = 3.6V; ON = GND = PGND = 0; RSO, ONO, DR1, DR2 = open; BP bypassed with 0.01µF, OUT1 bypassed with 4.7µF; OUT2, OUT3, OUT4, OUT5 bypassed with 2.2µF; OUT15 set to 2.98V, TA = 0°C to +85°C, unless otherwise noted. Typical values are at TA = +25°C.) PARAMETER OUT25 REGULATORS Output Accuracy Output Accuracy (Line and Load) Nominal Voltage Adjust Range Dropout Voltage Load Regulation Line Regulation Current Limit Output-Discharge Switch Resistance Output Voltage Noise Reset Timer Watchdog Timer OUT1 Shutdown Timer (MAX1798A/MAX1799A only) Regulator output turned off f = 10Hz to 100kHz, COUT = 2.2µF 140 35 175 IOUT_ = 50mA (Note 3) 1mA IOUT_ 150mA, 2.5V VIN_ 5.5V, VOUT_ = 1.8V (Note 3) 32 steps through serial interface; Tables 2, 3 IOUT_ = 1mA (Notes 1, 3) IOUT_ = 100mA (Notes 1, 3) 1mA IOUT_ 150mA 2.5V VIN_ 5.5V, VOUT_ = 1.8V (Note 3) -0.15 160 -2 -3 1.8 1 50 -0.005 -0.02 250 110 45 235 60 295 430 110 540 0.11 500 300 100 2 3 3.3 % % V mV %/mA %/V mA µVRMS ms ms SYMBOL CONDITIONS MIN TYP MAX UNITS
MAX1798/MAX1798A/MAX1799/MAX1799A
LOGIC AND CONTROL INPUTS (ON, OFF, RSO, DIN (SDA), SCLK (SCK), CS (AS))
ms
Input Low Level
Input High Level SDA Output Low Level (MAX1799 only) OFF Pulldown Resistance ONO Output Low Level ONO Output High Level RSO Output Low Level RSO Output High Level (Internal Pullup Resistor) RSO Reset Resistance DR1, DR2 Output Low Level DR1, DR2 OFF Current (Leakage) THERMAL SHUTDOWN Threshold Hysteresis
VIL
VIH IDIN (SDA) = 3mA IDIN (SDA) = 6mA OFF = 5.5V IONO = 1mA IONO = -1mA IRSO = 1mA, VIN1 = 1V IRSO = 0 RSO = 2.48V IDR1 = IDR2 = 100mA (Note 3) IOFF VDR1 = VDR2 = 5.5V -1 VOUT1 0.5 9 14 0.2 VOUT1 0.5 80 155 0.05 1.6
0.4
0.4 0.6 360 0.5
V
V V
k V V
0.5
V V
19 0.5 1
k V µA
160 10
°C °C
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