MAX15061ATE+ Maxim Integrated Products, MAX15061ATE+ Datasheet

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MAX15061ATE+

Manufacturer Part Number
MAX15061ATE+
Description
IC BOOST CONV/CURR MON 16-TQFN
Manufacturer
Maxim Integrated Products
Datasheet

Specifications of MAX15061ATE+

Applications
Current/Power Monitor
Current - Supply
1.2mA
Voltage - Supply
2.7 V ~ 5.5 V
Operating Temperature
-40°C ~ 125°C
Mounting Type
Surface Mount
Package / Case
16-TQFN Exposed Pad
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
The MAX15061 consists of a constant-frequency pulse-
width modulating (PWM) step-up DC-DC converter with
an internal switch and a high-side current monitor with
high-speed adjustable current limiting. This device can
generate output voltages up to 76V and provides current
monitoring up to 4mA (up to 300mW). The MAX15061
can be used for a wide variety of applications such as
avalanche photodiode biasing, PIN biasing, or varactor
biasing, and LCD displays. The MAX15061 operates
from 2.7V to 11V.
The constant-frequency (400kHz), current-mode PWM
architecture provides low-noise output voltage that is
easy to filter. A high-voltage, internal power switch
allows this device to boost output voltages up to 76V.
Internal soft-start circuitry limits the input current when
the boost converter starts. The MAX15061 features a
shutdown mode to save power.
The MAX15061 includes a current monitor with more
than three decades of dynamic range and monitors cur-
rent ranging from 500nA to 2mA with high accuracy.
Resistor-adjustable current limiting protects the APD
from optical power transients. A clamp diode protects
the monitor’s output from overvoltage conditions. Other
protection features include cycle-by-cycle current limit-
ing of the boost converter switch, undervoltage lockout,
and thermal shutdown if the die temperature reaches
+160°C.
The MAX15061 is available in a thermally enhanced
4mm x 4mm, 16-pin TQFN package and operates over
the -40°C to +125°C automotive temperature range.
19-5034; Rev 0; 10/09
Typical Operating Circuits appear at end of data sheet.
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.
Avalanche Photodiode Biasing and Monitoring
PIN Diode Bias Supplies
Low-Noise Varactor Diode Bias Supplies
FBON Modules
GPON Modules
LCD Displays
80V, 300mW Boost Converter and Current
________________________________________________________________ Maxim Integrated Products
General Description
Monitor for APD Bias Applications
Applications
o Input Voltage Range
o Wide Output-Voltage Range from (V
o Internal 1Ω (typ) 80V Switch
o 300mW Boost Converter Output Power
o Accurate ±10% (500nA to 1mA) and ±3.5% (1mA
o Resistor-Adjustable Ultra-Fast APD Current Limit
o Open-Drain Current-Limit Indicator Flag
o 400kHz Fixed Switching Frequency
o Constant PWM Frequency Provides Easy Filtering
o Internal Soft-Start
o 2µA (max) Shutdown Current
o -40°C to +125°C Temperature Range
o Small Thermally Enhanced, 4mm x 4mm, 16-Pin
+ Denotes a lead(Pb)-free/RoHS-compliant package.
* EP = Exposed pad.
MAX15061ATE+
to 4mA) High-Side Current Monitor
(1µs Response Time)
in Low-Noise Applications
TQFN Package
TOP VIEW
*CONNECT EXPOSED PAD TO SGND.
+2.7V to +5.5V (Using Internal Charge Pump) or
+5.5V to +11V
PART
SHDN
PGND
BIAS
LX
13
14
15
16
+
12
1
(4mm
-40°C to +125°C
Ordering Information
TEMP RANGE
THIN QFN
MAX15061
11
2
×
Pin Configuration
4mm)
10
3
*EP
9
4
IN
PIN-PACKAGE
8
7
6
5
Features
16 TQFN-EP*
+ 1V) to 76V
ILIM
CNTRL
FB
SGND
1

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MAX15061ATE+ Summary of contents

Page 1

... Constant PWM Frequency Provides Easy Filtering in Low-Noise Applications o Internal Soft-Start o 2µA (max) Shutdown Current o -40°C to +125°C Temperature Range o Small Thermally Enhanced, 4mm x 4mm, 16-Pin TQFN Package PART MAX15061ATE+ + Denotes a lead(Pb)-free/RoHS-compliant package Exposed pad. Applications TOP VIEW BIAS SHDN PGND LX *CONNECT EXPOSED PAD TO SGND ...

Page 2

Boost Converter and Current Monitor for APD Bias Applications ABSOLUTE MAXIMUM RATINGS PWR SGND ...................................................-0.3V to +12V LX to PGND ............................................................-0.3V to +80V BIAS, APD to SGND ...............................................-0.3V to +80V SHDN to SGND............................................-0. CLAMP ...

Page 3

Boost Converter and Current Monitor for APD Bias Applications ELECTRICAL CHARACTERISTICS (continued 3.3V 3.3V. C SHDN IN PWR IN APD = unconnected. CLAMP = unconnected. ILIM = unconnected, MOUT = unconnected. T ...

Page 4

Boost Converter and Current Monitor for APD Bias Applications ( 3.3V 70V, circuit of Figure 3 (Figure 4 for V PWR IN OUT EFFICIENCY vs. LOAD CURRENT 30V OUT 60 ...

Page 5

Boost Converter and Current ( 3.3V 70V, circuit of Figure 3 (Figure 4 for V PWR IN OUT LIGHT-LOAD SWITCHING WAVEFORM WITH RC FILTER I = 0.1mA, V OUT 1μs/div LOAD-TRANSIENT RESPONSE MAX15061 ...

Page 6

Boost Converter and Current Monitor for APD Bias Applications ( 3.3V 70V, circuit of Figure 3 (Figure 4 for V PWR IN OUT BIAS CURRENT vs. APD CURRENT 70V BIAS ...

Page 7

Boost Converter and Current Monitor for APD Bias Applications ( 3.3V 70V, circuit of Figure 3 (Figure 4 for V PWR IN OUT STARTUP DELAY MAX15061 toc24 I = 2mA APD 100μs/div STARTUP ...

Page 8

Boost Converter and Current Monitor for APD Bias Applications ( 3.3V 70V, circuit of Figure 3 (Figure 4 for V PWR IN OUT SWITCHING FREQUENCY vs. INPUT VOLTAGE 500 480 460 440 420 ...

Page 9

Boost Converter and Current Monitor for APD Bias Applications PIN NAME Boost Converter Input Voltage. PWR powers the switch driver and charge pump. Bypass PWR to PGND with a 1 PWR ceramic capacitor of 1μF minimum value. Positive ...

Page 10

Boost Converter and Current Monitor for APD Bias Applications REF MUX +A CNTRL -C SGND +C REFERENCE V REF COMPARATOR CHARGE CN PUMP CP (DOUBLER) MAX15061 IN UVLO Detailed Description The MAX15061 constant-frequency, current-mode, PWM ...

Page 11

Boost Converter and Current Monitor for APD Bias Applications The MAX15061 includes a versatile current monitor intended for monitoring the APD, PIN, or varactor diode DC current in fiber and other applications. The MAX15061 features more than three ...

Page 12

Boost Converter and Current Monitor for APD Bias Applications FB MAX15061 Figure 1. Adjustable Output Voltage Design Procedure Setting the Output Voltage Set the MAX15061 output voltage by connecting a resis- tive divider from the output to FB ...

Page 13

Boost Converter and Current Monitor for APD Bias Applications The MAX15061’s high switching frequency demands a high-speed rectifier. Schottky diodes are recommend- ed for most applications because of their fast recovery time and low forward-voltage drop. Ensure that ...

Page 14

Boost Converter and Current Monitor for APD Bias Applications Determining Monitor Current Limit Calculate the value of the monitor current-limit resistor for a given APD current limit, I LIM lowing equation: 1.245V = × ...

Page 15

Boost Converter and Current Monitor for APD Bias Applications V IN PWR CNTRL 1μF MAX15061 10nF CN RLIM SGND R LIM 2.87kΩ Figure 3. Typical Operating Circuit for V ______________________________________________________________________________________ L1 4.7μH ...

Page 16

... Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied. Maxim reserves the right to change the circuitry and specifications without notice at any time. 16 ____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 © 2009 Maxim Integrated Products L1 4.7μ ...

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