MAXIM MAX1947 Technical data

General Description

The MAX1947 is a compact, high-efficiency, step-up DC­DC converter that regulates output voltages from 1.8V to

3.3V to power µP/DSP cores, memory, and I/O rails in 1­and 2-cell alkaline/NiMH/NiCd battery-powered systems.
It features an internal 800mA switch and synchronous
rectifier to achieve up to 94% efficiency and to eliminate
the need for an external Schottky diode.

High-frequency switching (up to 2MHz) results in low
ripple and small external components, while automatic
pulse skipping at light loads reduces supply current to
just 70µA for extended battery life. Maxim’s proprietary
True Shutdown™ reduces supply current to just 2µA
and fully discharges the output to ground. The convert­er is offered in fixed-output voltages of 1.8V, 2.5V, 3.0V,
and 3.3V, requiring no feedback or compensation net­work. A 75ms RESET output flag provides for power-on
reset (POR) and undervoltage detection. The MAX1947
is available in a space-saving 8-pin TDFN package.

Applications

MP3 Players, Pagers, and CD Players

PDAs and Organizers

Digital Still Cameras

Cordless Phones

Wireless Mice/Keyboards

Portable Medical Equipment

Other Battery-Powered Systems

Features

♦ Low Input (0.7V) and Output (1.8V) Voltage

Capability

♦ Internal Synchronous Rectifier

♦ High 94% Efficiency

♦ Fixed Output Voltages: 1.8V, 2.5V, 3V, and 3.3V

♦ Up to 2MHz Switching Allows Small External

Components and Low Output Ripple

♦ Automatic Pulse Skipping at Light Loads for

Extended Battery Life

♦ Low 70µA (typ) Operating Supply Current

(Measured at OUT)

♦ Low 2µA Logic-Controlled Shutdown

♦ True Shutdown Fully Discharges Output to Ground

♦ Uses Only Small Ceramic Capacitors
♦ 75ms RESET Output Flag

MAX1947

Low Input/Output Voltage

Step-Up DC-DC Converter with

RESET

________________________________________________________________ Maxim Integrated Products 1

Pin Configuration

Ordering Information

MAX1947

LX

GND

BATT

OUT

PGND

10μF

2.2μF

4.7μH

V

OUT

+1.8V, +2.5V,
+3.0V, +3.3V

V

IN

+0.7V TO +V

OUT

RESET

SHDN

Typical Application Circuit

19-3086; Rev 2; 10/06

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.

*xy represents the output voltage code (e.g., 18 =1.8V).
Standard output voltages include 3.3V (33), 3.0V (30), 2.5V
(25), and 1.8V (18). Contact the factory for other output voltages
in 100mV increments between 1.8V and 3.3V; the minimum
order quantity is 25,000 units.
+Denotes lead-free package.

EVALUATION KIT

AVAILABLE

True Shutdown is a trademark of Maxim Integrated Products, Inc.

PART TEMP RANGE PIN-PACKAGE

MAX1947ETAxy*-T -40°C to +85°C

MAX1947ETAxy*+T -40°C to +85°C

8 TDFN 3mm x 3mm

8 TDFN 3mm x 3mm

PKG

CODE

T833-1

T833-1

TOP VIEW

RESET

1

2

GND

3

4

A "+" SIGN WILL REPLACE THE FIRST

PIN INDICATOR ON LEAD-FREE PACKAGES.

MAX1947

TDFN

3mm x 3mm

87BATT

OUTGND

LX

6

PGNDSHDN

5

MAX1947

Low Input/Output Voltage
Step-Up DC-DC Converter with

RESET

2 _______________________________________________________________________________________

ABSOLUTE MAXIMUM RATINGS

ELECTRICAL CHARACTERISTICS

(V

BATT

= 1.5V, TA = -40°C to +85°C, unless otherwise noted. Typical values are at TA = +25°C.) (Note 2)

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.

Note 1: LX has internal clamp diodes to PGND and OUT. Applications that forward bias these diodes should take care not to exceed the

IC’s package power-dissipation limits.

BATT, OUT, SHDN to GND ...................................-0.3V to +4.0V

RESET to GND..........................................-0.3V to (V

OUT

+ 0.3V)

PGND to GND .......................................................-0.3V to +0.3V

Switch Current (I

LX

, I

OUT

, I

PGND

) (Note 1) .................-1A to +1A

Continuous Power Dissipation (T

A

= +70°C)
8-Pin TDFN (derate 24.4mW/°C

above +70°C)..........................................................1951.2mW

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

Minimum Startup Voltage R

Startup-Voltage Temperature
Coefficient

Maximum Input Operating
Voltage

Minimum Input Operating Voltage 0.7 V

Output Voltage

Load Regulation No load to full load 1.2 %

Full-Load Output Current

Supply Current into BATT No switching 2 4 µA

Supply Current into OUT No switching 70 110 µA

LX Switch Maximum On-Time 0.7 1 1.3 µs

LX Switch Minimum Off-Time 0.2 0.25 0.3 µs

Maximum On-Time to Minimum
Off-Time Ratio

Frequency in Startup 650 kHz

PARAMETER CONDITIONS MIN TYP MAX UNITS

= 1kΩ, TA = +25°C 0.8 0.95 V

LOAD

-2.1 mV/°C

(Note 3) 3.6 V

MAX1947ETA18, I

MAX1947ETA25, I

MAX1947ETA30, I

MAX1947ETA33, I

V

= 1V

BATT

= 1.8V

V

BATT

V

= 2.5V, 3.0V, 3.3V 3.6 4 4.6

OUT

= 1.8V 3.0 4 4.6

V

OUT

= 40mA 1.74 1.8 1.86

LOAD

= 32mA 2.42 2.5 2.58

LOAD

= 25mA 2.9 3.0 3.1

LOAD

= 25mA 3.2 3.3 3.4

LOAD

MAX1947ETA18 160 273

MAX1947ETA25 130 214

MAX1947ETA30 100 185

MAX1947ETA33 100 169

MAX1947ETA25 240 380

MAX1947ETA30 200 361

MAX1947ETA33 200 329

V

mA

s/s

MAX1947

Low Input/Output Voltage

Step-Up DC-DC Converter with

RESET

_______________________________________________________________________________________ 3

Note 2: Limits are 100% production tested at TA= +25°C. Limits over the operating temperature range are guaranteed by design.
Note 3: When BATT is greater than the output-voltage set point, the part is in track mode (see the Track Mode section).

ELECTRICAL CHARACTERISTICS (continued)

(V

BATT

= 1.5V, TA = -40°C to +85°C, unless otherwise noted. Typical values are at TA = +25°C.) (Note 2)

Startup to Normal-Mode Output
Transition Voltage

NFET Current Limit

PFET Turn-Off Current

Internal NFET
On-Resistance

Internal PFET
On-Resistance

LX Leakage Current

SHUTDOWN MODE

Shutdown Supply Current SHDN = GND 2 4 µA

SHDN Input Voltage

SHDN Input Bias Current

OUT Discharge Resistance in
Shutdown

RESET OUTPUT

Reset OUT Voltage Trip Level V

Minimum V

Reset Timeout 65 140 235 ms

RESET Output Voltage

PARAMETER CONDITIONS MIN TYP MAX UNITS

50mV hysteresis, rising edge 1.40 1.62 1.73 V

TA = 0°C to +85°C 600 800 1000

T

= -40°C to +85°C 580 800 1000

A

TA = 0°C to +85°C 15 75 150

T

= -40°C to +85°C 10 75 150

A

MAX1947ETA18 0.3 0.6

I

= 100mA

LX

I

= 100mA

LX

SHDN = GND, V
V

= 3.6V

LX

V

IH

V

IL

SHDN = OUT or GND, TA = +25°C 1 100
SHDN = OUT or GND, T

SHDN = GND 500 1000 Ω

falling, 1% hysteresis 87 90 93 %

OUT

for Valid Reset 0.9 V

OUT

I

= 200µA 0.3

SINK

I

= 200µA 0.8 x V

SOURCE

MAX1947ETA25 0.22 0.44

MAX1947ETA30 0.17 0.34

MAX1947ETA33 0.15 0.3

MAX1947ETA18 0.5 1.0

MAX1947ETA25 0.35 0.7

MAX1947ETA30 0.28 0.56

MAX1947ETA33 0.25 0.5

OUT

= 0V,

TA = +25°C 0.1 1

T

= +85°C 1

A

0.8 x

V

BATT

= +85°C5

A

OUT

0.18 x
V

BATT

mA

mA

Ω

Ω

µA

V

nA

V

MAX1947

Low Input/Output Voltage
Step-Up DC-DC Converter with

RESET

4 _______________________________________________________________________________________

Typical Operating Characteristics

(VIN= 1.5V, Circuit of Typical Application Circuit, TA = +25°C, unless otherwise noted.)

0.1 101 100 1000

MAX1947ETA18

EFFICIENCY vs. LOAD CURRENT

MAX1947toc01

LOAD CURRENT (mA)

EFFICIENCY (%)

100

60

70

80

90

65

75

85

95

VIN = 1.6V

VIN = 1.25V

VIN = 1V

0.1 101 100 1000

MAX1947ETA33

EFFICIENCY vs. LOAD CURRENT

MAX1947toc04

LOAD CURRENT (mA)

EFFICIENCY (%)

100

60

70

80

90

65

75

85

95

VIN = 1.8V

VIN = 1.25V

VIN = 1V

VIN = 2.5V

0.6

1.0

0.8

1.4

1.2

1.6

1.8

2.0

STARTUP VOLTAGE
vs. LOAD CURRENT

MAX1947toc07

LOAD CURRENT (mA)

STARTUP VOLTAGE (V)

0406020 100 14080 120

V

OUT

= 1.8V

V

OUT

= 2.5V

V

OUT

= 3.0V

V

OUT

= 3.3V

0.1 101 100 1000

MAX1947ETA25

EFFICIENCY vs. LOAD CURRENT

MAX1947toc02

LOAD CURRENT (mA)

EFFICIENCY (%)

100

60

70

80

90

65

75

85

95

VIN = 1.6V

VIN = 1.25V

VIN = 1V

0

400

200

800

600

1000

1200

MAXIMUM OUTPUT CURRENT

vs. INPUT VOLTAGE

MAX1947toc05

INPUT VOLTAGE (V)

MAXIMUM OUTPUT CURRENT (mA)

0.7 1.7 2.21.2 2.7 3.2 3.7

V

OUT

= 1.8V

V

OUT

= 2.5V

V

OUT

= 3.0V

V

OUT

= 3.3V

0

0.3

0.2

0.1

0.4

0.5

0.6

0.7

0.8

0.9

1.0

-40 10-15 356085

STARTUP VOLTAGE
vs. TEMPERATURE

MAX1947toc08

TEMPERATURE (°C)

STARTUP VOLTAGE (V)

R

LOAD

= 1kΩ

R

LOAD

= 0Ω

0.1 101 100 1000

MAX1947ETA30

EFFICIENCY vs. LOAD CURRENT

MAX1947toc03

EFFICIENCY (%)

100

60

70

80

90

65

75

85

95

VIN = 1.8V

VIN = 1.25V

VIN = 1V

VIN = 2.5V

0

200

100

400

300

500

600

NO-LOAD INPUT CURRENT

vs. INPUT VOLTAGE

MAX1947toc06

INPUT VOLTAGE (V)

INPUT CURRENT (

μ

A)

0.7 1.7 2.21.2 2.7 3.2 3.7

V

OUT

= 1.8V

V

OUT

= 2.5V

V

OUT

= 3.3V

0

0.6

0.4

0.2

0.8

1.0

1.2

1.4

1.6

1.8

2.0

0.7 1.71.2 2.2 2.7 3.2 3.7

SHUTDOWN THRESHOLD

vs. INPUT VOLTAGE

MAX1947toc09

INPUT VOLTAGE (V)

SHUTDOWN THRESHOLD (V)

MAX1947

Low Input/Output Voltage

Step-Up DC-DC Converter with

RESET

_______________________________________________________________________________________ 5

Typical Operating Characteristics (continued)

(VIN= 1.5V, Circuit of Typical Application Circuit, TA = +25°C, unless otherwise noted.)

1.74

1.76

1.80

1.78

1.82

1.84

010050 150 200 250 300 350

OUTPUT VOLTAGE

vs. LOAD CURRENT

MAX1947toc10

LOAD CURRENT (mA)

OUTPUT VOLTAGE (V)

HEAVY-LOAD SWITCHING WAVEFORMS

MAX1947toc13

V

OUT

(AC-COUPLED)

I

L

V

LX

V

IN

(AC-COUPLED)

50mV/div

50mV/div

2V/div

500mA/div

2μs/div

LINE-TRANSIENT WAVEFORMS

MAX1947toc15

V

IN

V

OUT

(AC-COUPLED)

1.5V

1V

50mV/div

10μs/div

1.74

1.76

1.80

1.78

1.82

1.84

0.7 0.90.8 1.0 1.1 1.3 1.51.2 1.4 1.6 1.7

NO-LOAD OUTPUT VOLTAGE

vs. INPUT VOLTAGE

MAX1947toc11

INPUT VOLTAGE (V)

OUTPUT VOLTAGE (V)

LIGHT-LOAD SWITCHING WAVEFORMS

MAX1947toc14

V

OUT

(AC-COUPLED)

I

L

V

LX

V

IN

(AC-COUPLED)

50mV/div

50mV/div

2V/div

500mA/div

2μs/div

LOAD-TRANSIENT WAVEFORMS

MAX1947toc16

I

LOAD

V

OUT

(AC-COUPLED)

200mA/div

50mV/div

10μs/div

1.74

1.76

1.80

1.78

1.82

1.84

-40 10-15 35 60 85

OUTPUT VOLTAGE

vs. TEMPERATURE

MAX1947toc12

TEMPERATURE (°C)

OUTPUT VOLTAGE (V)

I

LOAD

= 40mA

MAX1947

Detailed Description

The MAX1947 compact step-up DC-DC converter starts
up with voltages as low as 0.8V and operates with input
voltages down to 0.7V. An internal synchronous rectifier
reduces cost by eliminating the need for an external
Schottky diode and improves overall efficiency by
reducing losses in the circuit. The efficiency is further

increased with the low 70µA quiescent current and low
on-resistance of the internal n-channel MOSFET power
switch. The MAX1947 uses Maxim’s proprietary True
Shutdown circuitry, which disconnects the output from
the input in shutdown and actively discharges the
output to ground.

Low Input/Output Voltage
Step-Up DC-DC Converter with

RESET

6 _______________________________________________________________________________________

Pin Description

Typical Operating Characteristics (continued)

(VIN= 1.5V, Circuit of Typical Application Circuit, TA = +25°C, unless otherwise noted.)

V

V

RESET

IN

V

OUT

PIN NAME FUNCTION

POWER-ON RESET WAVEFORMS

20ms/div

MAX1947toc17

1V/div

1V/div

1V/div

V

RESET

V

SHDN

EXITING AND ENTERING

SHUTDOWN WAVEFORMS

V

OUT

20ms/div

MAX1947toc18

1V/div

1V/div

1V/div

Active-Low Push-Pull Reset Output. RESET goes high 75ms (min) after the output voltage has

1 RESET

2 GND Ground. Connect to exposed paddle.

3 GND Ground. Connect to exposed paddle.

4 SHDN

5 PGND Power Ground. Connect to exposed paddle.

6LX

7 OUT

8 BATT Batter y C onnecti on. V

— EP Exposed Paddle. Connect to GND and PGND.

exceeded 90% of its final value. The RESET output is valid for output voltages as low as 0.9V. RESET
is driven low in shutdown.

Shutdown Input. Connect to BATT or logic 1 for normal operation. Connect to GND or logic 0 for a low
quiescent-current shutdown mode.

Inductor Connection to the Drains of the Internal n-Channel Switch and p-Channel Synchronous
Rectifier

Regulator Output. Bypass with 10µF ceramic capacitor to GND for full-load capability. For less than
50% of full load, a 4.7µF capacitor can be used.

i s used for the star tup osci l l ator and to p ow er the chi p w hen V

B A TT

OU T

< V

B A TT

.

Control Scheme

The MAX1947 is a bootstrapped design. Upon turn-on,
a startup oscillator brings the output voltage high
enough to allow the main DC-DC circuitry to run. Once
the output voltage reaches 1.62V (typ) the main DC-DC
circuitry turns on and boosts the output voltage to the
final regulation point.

The unique minimum off-time, current-limited control
scheme is the key to the MAX1947’s low operating cur­rent and high efficiency over a wide load range. The
architecture combines the high output power and effi­ciency of a pulse-width modulation (PWM) device with
the ultra-low quiescent current of a traditional pulse­skipping controller. The switching frequency can be as
high as 2MHz and depends upon the load current and
input voltage. The MAX1947 is designed to operate
using low-ESR ceramic capacitors, so output voltage
ripple due to ESR is very small (approximately 10mV

P-P

).

Track Mode

The MAX1947 enters track mode when BATT is greater
than the output-voltage regulation point. Track mode
can only be entered under the following conditions:

V

BATT

> V

OUT

, V

OUT

> V

OUT

regulation point, and the
minimum off-time expires. During track mode, the syn­chronous rectifier is turned on 100% of the time and the
output voltage tracks the battery voltage. Track mode is
exited by V

OUT

falling below the V

OUT

regulation point.

Synchronous Rectification

The internal synchronous rectifier eliminates the need
for an external Schottky diode, reducing cost and board
space. During the cycle off-time, the p-channel MOSFET
turns on and shunts the MOSFET body diode. As a
result, the synchronous rectifier significantly improves
efficiency without the addition of an external compo­nent. Conversion efficiency can be as high as 94%.

RESET

The MAX1947 features an active-low push-pull RESET
output for use with a microcontroller (µC). It signals the
µC when the MAX1947 output voltage is within operat­ing limits. During startup, RESET is held low. When the
RESET threshold (90% of the output regulation voltage)
is reached, a 75ms (min) timer begins counting. RESET
is switched high once the timer expires.

MAX1947

Low Input/Output Voltage

Step-Up DC-DC Converter with

RESET

_______________________________________________________________________________________ 7

Functional Diagram

BATT

SHDN

STARTUP

OSCILLATOR

SHUTDOWN

CIRCUITRY

t

ON

MAX TIMER

t

OFF

MIN TIMER

1.25V REFERENCE

GND

(REF)

REF

AMPLIFIER

CONTROL

LOGIC AND

GATE DRIVERS

MAX1947

ERROR

CURRENT-LIMIT

AMPLIFIER

75ms TIMER

0.9 x REF

REF

ZERO-CROSSING

AMPLIFIER

*BODY DIODE CONTROL

RESET

OUT

P*

LX

N

PGND

MAX1947

Shutdown

The MAX1947 enters shutdown mode when SHDN is
driven low. During shutdown, the synchronous rectifier
disconnects the output from the input, eliminating the DC
conduction path that normally exists with traditional boost
converters in shutdown mode. The output is actively dis­charged to ground through an internal 500Ω resistor. The
quiescent current is reduced to 2µA while in shutdown
mode. Drive SHDN high for normal operation. The output
reaches regulation approximately 650µs after SHDN
goes high.

Applications Information

Inductor Selection

An inductor value of 4.7µH performs well in most appli­cations. The MAX1947 also works with inductors in the

2.2µH to 6.8µH range. Smaller inductance values typi-

cally offer a smaller physical size for a given series
resistance, allowing the smallest overall circuit dimen­sions but with lower output-current capability. Circuits
using larger inductance values exhibit higher output­current capability, but are larger for the same series
resistance and current rating.

The inductor’s incremental saturation current rating should
be greater than the peak switch-current limit. However, it
is generally acceptable to bias the inductor into saturation
by as much as 20%, although this slightly reduces
efficiency (see the Electrical Characteristics for the
MAX1947 NFET current limit). Table 1 lists the suggested
components for several typical applications. Also, the
inductor’s DC resistance significantly affects efficiency.
Table 2 lists suggested component manufacturers.

Low Input/Output Voltage
Step-Up DC-DC Converter with

RESET

8 _______________________________________________________________________________________

Table 1. Suggested Component Values

Table 2. Suggested Component Manufacturers

APPLICATION LOAD INPUT CAPACITOR (µF) OUTPUT CAPACITOR (µF) INDUCTOR (µH)

1-Cell Input,

Output < 2.7V

1-Cell Input,

Output > 2.7V

2-Cell Input

≤50% full load 2.2 4.7 3.3

>50% full load 2.2 10 3.3

≤50% full load 2.2 4.7 4.7

>50% full load 2.2 10 4.7

≤50% full load 2.2 4.7 6.8

>50% full load 2.2 10 6.8

MANUFACTURER PART PART NUMBER PHONE WEBSITE

Sumida Inductor CDRH3D16 series 81-3-3667-3381 www.sumida.com

4.7µF JMK212BJ475MG,
10µF JMK212BJ106MG

4.7µF C2012X5R0J475K,
10µF C2012X5R0J106K

408-573-4150 www.t-yuden.com

888-835-6646 www.TDK.com

Taiyo Yuden

TDK

Output capacitors

Input capacitors 2.2µF LMK107BJ225MA

Output capacitors

Input capacitors 2.2µF C1608X5R03225M

Calculate the maximum output current (I

OUTMAX

) using

inductor ripple current (I

RIPPLE

) and duty cycle (D) as

follows:

Here, I

LIM

is the NFET current limit (800mA typ), t

OFF

is
the LX switch’s off-time (0.25µs typ), and RLis the
series resistance of the inductor.

Capacitor Selection

The MAX1947 is specifically designed for using small,
inexpensive, low-ESR ceramic capacitors. X5R and
X7R dielectrics are recommended when operating over
wide temperature ranges. Bypass the output of the
MAX1947 with 10µF when using maximum load cur­rents. When using less than half the maximum load cur­rent capability, the output capacitor can be reduced to

4.7µF. Bypass the input with a 2.2µF or larger ceramic
capacitor. Table 1 lists the suggested values for the
input and output capacitors for typical applications.

PCB Layout and Grounding

Careful PCB layout is important for minimizing ground
bounce and noise. Keep the IC’s GND pins and the
ground leads of the input and output filter capacitors
very close together. Connect GND and PGND directly
to the exposed paddle. In addition, keep all connec­tions to the OUT and LX pins as short as possible. To
maximize output power and efficiency and minimize
output ripple voltage, use short, wide traces from the
input and output. A sample layout is available in the
MAX1947 evaluation kit.

Chip Information

TRANSISTOR COUNT: 5156

PROCESS: BiCMOS

MAX1947

Low Input/Output Voltage

Step-Up DC-DC Converter with

RESET

_______________________________________________________________________________________ 9

VIR RV

+× +−

I

RIPPLE

D

=

OUTMAX

OUT LIM DS ON PFET L BATT

=

Lt

/

OFF

⎡

VI

+− ×

()

OUT

⎢
⎢

R

(

⎢

DS ON PFET

⎢

⎣

⎡

VI

⎢
⎢

R

(

⎢⎢

DS ON PFET

()

⎢

⎣

()()

=− ×−II

LIM

()

+− ×

()

OUT

LIM

−+

I

RIPPLE

LIM

()

()

RR

()

DS ON PFET L

()

+

I

RIPPLE

2

RV

+−

)

L BATT

I

RIPPLE

2

RR

DS ON NFET L

()

2

1

2

D

⎤
⎥
⎥
⎥

⎥

⎦

+

⎤
⎥
⎥

)

⎥
⎥

⎦

MAX1947

Low Input/Output Voltage
Step-Up DC-DC Converter with

RESET

10 ______________________________________________________________________________________

Package Information

(The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information,
go to www.maxim-ic.com/packages

.)

6, 8, &10L, DFN THIN.EPS

PACKAGE OUTLINE, 6,8,10 & 14L,
TDFN, EXPOSED PAD, 3x3x0.80 mm

21-0137

1

H

2

MAX1947

Low Input/Output Voltage

Step-Up DC-DC Converter with

RESET

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.

11 ____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600

© 2006 Maxim Integrated Products is a registered trademark of Maxim Integrated Products, Inc.

Package Information

(The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information,
go to www.maxim-ic.com/packages

.)

Revision History

Pages changed at Revision 5: 1, 2, 8, 10

COMMON DIMENSIONS

SYMBOL

MIN. MAX.

A 0.70 0.80

D 2.90 3.10
E 2.90 3.10

A1

0.00 0.05

L 0.20 0.40

0.25 MIN.k

A2 0.20 REF.

PACKAGE VARIATIONS
PKG. CODE N D2 E2 e JEDEC SPEC b [(N/2)-1] x e

2.30±0.101.50±0.106T633-1 0.95 BSC MO229 / WEEA 1.90 REF0.40±0.05

T633-2 6 1.50±0.10 2.30±0.10

1.50±0.10
T833-2 8 1.50±0.10 2.30±0.10 0.65 BSC MO229 / WEEC 0.30±0.05 1.95 REF
T833-3 8 1.50±0.10 2.30±0.10 0.65 BSC MO229 / WEEC 0.30±0.05 1.95 REF

1.50±0.10

1.50±0.1010T1033-2

2.30±0.10

0.95 BSC MO229 / WEEA
MO229 / WEEC

MO229 / WEED-3

0.50 BSC

0.40 BSC - - - - 0.20±0.05 2.40 REFT1433-2 14 2.30±0.101.70±0.10

MO229 / WEED-3

0.40±0.05 1.90 REF

1.95 REF0.30±0.050.65 BSC2.30±0.108T833-1

2.00 REF0.25±0.050.50 BSC2.30±0.1010T1033-1

2.00 REF0.25±0.05

2.40 REF0.20±0.05- - - - 0.40 BSC1.70±0.10 2.30±0.1014T1433-1

PACKAGE OUTLINE, 6,8,10 & 14L,

-DRAWING NOT TO SCALE-

TDFN, EXPOSED PAD, 3x3x0.80 mm

21-0137

2

H

2