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Maxim Integrated Semiconductor Electronic Components Datasheet

MAX8836Z Datasheet

1.2A PWM Step-Down Converter In 2mm X 2mm WLP/UCSP

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19-4059; Rev 1; 9/08
www.DataSheet4U.com
1.2A PWM Step-Down Converter in
2mm x 2mm WLP/UCSP for PA Power
General Description
The MAX8836Z high-frequency step-down converter is
optimized to provide a fixed output voltage with ultra-
low dropout. The device integrates a high-efficiency
PWM step-down converter for medium- and low-power
transmission, and a 60mtypical bypass FET for ultra
low-dropout operation. A 200mA low-noise, high-PSRR
low-dropout regulator (LDO) is also integrated.
Fast-switching allows the use of small ceramic input and
output capacitors while maintaining low ripple voltage.
The feedback network is integrated, further reducing
external component count and total solution size. At high
duty cycle, the MAX8836Z automatically switches to the
bypass mode, connecting the input to the output
through a low-impedance (60mtyp) MOSFET. The
LDO in the MAX8836Z is designed for low-noise opera-
tion (35µVRMS typ). Both the PWM step-down and LDO
are individually enabled through separate logic-control
interfaces.
The MAX8836Z is available in 16-bump, 2mm x 2mm
WLP and UCSP™ packages (0.7mm max height).
Applications
WCDMA/NCDMA Cellular Handsets
Wireless PDAs
Smartphones
Ordering Information
PART
PIN-PACKAGE TEMP RANGE
MAX8836ZEWEEE+T
16 WLP
(W162B2+1)
-40°C to +85°C
MAX8836ZEREEE+T 16 UCSP
(R162A2+1)
-40°C to +85°C
+Denotes a lead-free/RoHS-compliant package.
T = Tape and reel.
Features
o PA Step-Down Converter
Selectable Output Voltage (3.1V or 3.4V)
25µs Settling Time for 3.1V to 3.4 VOUT Change
60mPFET at 100% Duty-Cycle for Low
Dropout
Low Output Voltage Ripple
1.2A Output Drive Capability
±2% Output Voltage Accuracy
Tiny External Components
o Low-Noise LDO
Low 35µVRMS (typ) Output Noise
High 65dB (typ) PSRR
Guaranteed 200mA Output Current Drive
Capability
ON/OFF Control
o Low 0.1µA Shutdown Current
o 2.7V to 5.5V Supply Voltage Range
o Thermal Shutdown
o Tiny 2mm x 2mm x 0.7mm WLP and UCSP
Packages (4 x 4 Grid)
Typical Operating Circuit
INPUT
Li+ BATTERY
4.7µF
IN
GND
PA
LX
SET OUTPUT
MAX8836Z
HP
ENABLE BUCK
PA_EN
LDO2
ENABLE LDO
EN2
REFBP
0.22µF
OUTPUT
3.1V OR 3.4V
2.2µH
4.7µF
200mA
1µF
Pin Configuration appears at end of data sheet.
UCSP is a trademark of Maxim Integrated Products, Inc.
________________________________________________________________ Maxim Integrated Products 1
For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,
or visit Maxim's website at www.maxim-ic.com.


Maxim Integrated Semiconductor Electronic Components Datasheet

MAX8836Z Datasheet

1.2A PWM Step-Down Converter In 2mm X 2mm WLP/UCSP

No Preview Available !

www.DataSheet4U.com
1.2A PWM Step-Down Converter in
2mm x 2mm WLP/UCSP for PA Power
ABSOLUTE MAXIMUM RATINGS
IN1A, IN1B, IN2, EN2, REFBP to AGND................-0.3V to +6.0V
PAA, PAB, PA_EN, HP to AGND....-0.3V to (VIN1A/VIN1B + 0.3V)
LDO2 to AGND ..........................................-0.3V to (VIN2 + 0.3V)
IN2 to IN1B/IN1A ...................................................-0.3V to +0.3V
PGND to AGND .....................................................-0.3V to +0.3V
LX Current ......................................................................0.7ARMS
IN1A/IN1B and PAA/PAB Current .....................................2ARMS
PAA and PAB Short Circuit to GND or IN...................Continuous
Continuous Power Dissipation (TA = +70°C)
16-Bump WLP (derate 12.5mW/°C above +70°C).............1W
16-Bump UCSP (derate 12.5mW/°C above +70°C) ..........1W
Junction Temperature ......................................................+150°C
Storage Temperature Range .............................-65°C to +150°C
Bump Temperature (soldering, reflow) ............................+260°C
Note: This device is constructed using a unique set of packaging techniques that impose a limit on the thermal profile the device
can be exposed to during board level solder attach and rework. This limit permits only the use of the solder profiles recom-
mended in the industry-standard specification, JEDEC 020A, paragraph 7.6, Table 3 for IR/VPR and Convection reflow.
Preheating is required. Hand or wave soldering is not allowed.
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
(VIN1A = VIN1B = VIN2 = VPA_EN = VEN2 = 3.6V, VHP = 0V, TA = -40°C to +85°C. Typical values are at TA = +25°C, unless otherwise
noted.) (Note 1)
PARAMETER
INPUT SUPPLY
Input Voltage
Input Undervoltage Threshold
HP, PA_EN, EN2 Pulldown
Resistor
Shutdown Supply Current
No-Load Supply Current
THERMAL PROTECTION
Thermal Shutdown
LOGIC CONTROL
CONDITIONS
VIN1A, VIN1B, VIN2
VIN1A, VIN1B, VIN2 rising, 180mV typical hysteresis
VPA_EN = VEN2 = 0V
TA = +25°C
TA = +85°C
VPA_EN = 0V, ILDO2 = 0A
VEN2 = 0V, IPA = 0A, switching
VEN2 = 0V, IPA = 0A, no switching
TA rising, 20°C typical hysteresis
MIN TYP MAX UNITS
2.7
2.52
400
2.63
800
0.1
0.1
100
3500
180
5.5
2.70
1600
4
150
V
V
k
µA
µA
+160
°C
PA_EN, EN2, HP Logic-Input
High Voltage
1.3 V
PA_EN, EN2, HP Logic-Input Low
Voltage
Logic-Input Current
(PA_EN, EN2, HP)
VIL = 0V
PA OUTPUT VOLTAGE
Output Voltage
ILX = 0A, VIN1A = VIN1B
= VIN2 = 3.9V
Output Voltage Load Regulation
TA = +25°C
TA = +85°C
HP = 0
HP = 1
0.4
0.01 1
0.1
V
µA
3.365
3.010
3.434
3.065
ILX x
RL/2
3.503
3.190
V
V
2 _______________________________________________________________________________________


Part Number MAX8836Z
Description 1.2A PWM Step-Down Converter In 2mm X 2mm WLP/UCSP
Maker Maxim Integrated Products
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