MAX606ESA+T Maxim Integrated Products, MAX606ESA+T Datasheet - Page 8

• Manufacturer Part Number: MAX606ESA+T
• Description: IC DC-DC CONVERT 8-SOIC
• Manufacturer: Maxim Integrated Products

Specifications of MAX606ESA+T

• Applications: Converter, Flash Memory PCMCIA Cards
• Voltage - Input: 3 ~ 5.5 V
• Number Of Outputs: 1
• Voltage - Output: 5V, 3 ~ 12.5 V
• Operating Temperature: 0°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 8-SOIC (3.9mm Width)
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Low-Profile, 5V/12V or Adjustable, Step-Up
DC-DC Converters for Flash Memory/PCMCIA Cards
Table 1. Suggested Components for 12V
Standard Application Circuit of Figure 2
The remainder of this document contains the detailed
information you’ll need to design a circuit that differs
from the two Standard Application Circuits. If you are
using one of the predesigned circuits, the following
sections are purely informational.
The MAX606/MAX607 CMOS, step-up DC-DC convert-
ers employ a current-limited pulse-frequency control
scheme. This control scheme regulates a boost topolo-
gy to convert input voltages between 3V and 5.5V into
either a pin-programmable 5V/12V output, or an
adjustable output between V
performance over all input and output voltages, and
guarantees output accuracy to ±4%.
The ultra-high switching frequency (typically 1MHz for
the MAX606 and 0.5MHz for the MAX607) permits the
use of extremely small external components, making
these converters ideal for use in Types 1, 2, and 3 flash
memory and PCMCIA applications.
The MAX606/MAX607 employ a proprietary, current-
limited control scheme that combines the ultra-low sup-
ply current of traditional pulse-skipping converters with
the high full-load efficiency of current-mode pulse-
width-modulation converters. This particular control
scheme is similar to the one used in previous current-
limited devices (which governed the switching current
8
DESIGNATION
_______________________________________________________________________________________
D1
C1
C2
C3
C4
L1
5µH inductor
Dale ILS-3825-XX
0.5A, 20V diode
Motorola MBR0520L
0.1µF ceramic cap.
2 x 0.68µF ceramic cap.
Marcon
THCR20E1E684Z
2 x 0.68µF ceramic cap.
Marcon
THCR20E1E684Z
10nF ceramic cap.
Pulse-Frequency-Modulation
MAX606
Detailed Description
IN
and 12.5V. It optimizes
Control Scheme
10µH inductor
Sumida CLS62-100
0.5A, 20V diode
Motorola MBR0520L
0.1µF ceramic cap.
2.2µF ceramic cap.
Marcon
THCR30E1E225M
2 x 1µF ceramic cap.
Marcon
THCR30E1E105M
10nF ceramic cap.
MAX607
via maximum on-time, minimum off-time, and current
limit), except it varies the on and off times according to
the input and output voltages. This important feature
enables the MAX606/MAX607 to achieve ultra-high
switching frequencies while maintaining high output
accuracy, low output ripple, and high efficiency over a
wide range of loads and input/output voltages.
Figure 3 shows the functional diagram of the MAX606/
MAX607. The internal power MOSFET is turned on when
the error comparator senses that the output is out of reg-
ulation. The power switch stays on until either the timing
circuit turns it off at the end of the on-time, or the switch
current reaches the current limit. Once off, the switch
remains off during the off-time. Subsequently, if the out-
put is still out of regulation, another switching cycle is ini-
tiated. Otherwise, the switch remains turned off as long
as the output is in regulation.
Table 2. Suggested Components for 5V
Standard Application Circuit of Figure 1
Table 3. Component Suppliers
Dale Inductors
Marcon/United
Chemi-Con
Motorola
Sumida USA
Sumida Japan
DESIGNATION
SUPPLIER
D1
C1
C2
C3
C4
L1
5µH, 1A inductor
Dale ILS-3825-XX
0.5A, 20V diode
Motorola MBR0520L
0.1µF ceramic cap.
2 x 0.68µF ceramic cap.
Marcon
THCR20E1E684Z
4.7µF ceramic cap.
Marcon
THCR30E1E475M
10nF ceramic cap.
602-244-3576
708-956-0666
605-668-4131
708-696-2000
MAX606
03-607-5111
PHONE
10µH, 0.7A inductor
Sumida CLS62B-100
0.5A, 20V diode
Motorola MBR0520L
0.1µF ceramic cap.
2.2µF ceramic cap.
Marcon
THCR30E1E225M
4.7µF ceramic cap.
Marcon
THCR30E1E475M
10nF ceramic cap.
605-665-1627
708-518-9985
602-244-4015
708-956-0702
03-607-5144
MAX607
FAX