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EL7534IYZ

P1-P3P4-P6P7-P9
1
®
FN7431.8
EL7534
Monolithic 600mA Step-Down Regulator
The EL7534 is a synchronous, integrated FET 600mA step-
down regulator with internal compensation. It operates with
an input voltage range from 2.5V to 5.5V, which
accommodates supplies of 3.3V, 5V, or a Li-Ion battery
source. The output can be externally set from 0.8V to V
IN
with a resistive divider.
The EL7534 features PWM mode control. The operating
frequency is typically 1.5MHz. Additional features include a
100ms Power-On-Reset output, <1µA shut-down current,
short-circuit protection, and over-temperature protection.
The EL7534 is available in the 10 Ld MSOP package,
making the entire converter occupy less than 0.15 in
2
of
PCB area with components on one side only. Both packages
are specified for operation over the full -40°C to +85°C
temperature range.
Pinout
EL7534 (10 LD MSOP)
TOP VIEW
Features
• Less than 0.15 in
2
(0.97 cm
2
) footprint for the complete
600mA converter
• Components on one side of PCB
• Max height 1.1 mm MSOP10
• 100ms Power-On-Reset output (POR)
• Internally-compensated voltage mode controller
• Up to 94% efficiency
• <1µA shut-down current
• Overcurrent and over-temperature protection
• Pb-free plus anneal available (RoHS compliant)
Applications
• PDA and pocket PC computers
• Bar code readers
• Cellular phones
• Portable test equipment
• Li-Ion battery powered devices
• Small form factor (SFP) modules
Typical Application Diagram
EL7534
TOP VIEW
Ordering Information
PART
NUMBER
PART
MARKING
TAPE &
REEL PACKAGE
PKG.
DWG. #
EL7534IY BPAAA - 10 Ld MSOP MDP0043
EL7534IY-T7 BPAAA 7” 10 Ld MSOP MDP0043
EL7534IY-T13 BPAAA 13” 10 Ld MSOP MDP0043
EL7534IYZ
(Note)
BGAAA - 10 Ld MSOP
(Pb-free)
MDP0043
EL7534IYZ-T7
(Note)
BGAAA 7” 10 Ld MSOP
(Pb-free)
MDP0043
EL7534IYZ-T13
(Note)
BGAAA 13” 10 Ld MSOP
(Pb-free)
MDP0043
NOTE: Intersil Pb-free plus anneal products employ special Pb-free
material sets; molding compounds/die attach materials and 100% matte
tin plate termination finish, which are RoHS compliant and compatible
with both SnPb and Pb-free soldering operations. Intersil Pb-free
products are MSL classified at Pb-free peak reflow temperatures that
meet or exceed the Pb-free requirements of IPC/JEDEC J STD-020.
SGND FB
VDD RSI
VIN EN
LX POR
PGND VO
1
2
3
4
10
9
8
7
5 6
* V
O
= 0.8V * (1 + R
1
/ R
2
)
1.8µH
C
1
C
2
10µF
L
1
0.1µF
C
3
(2.5V to 5.5V)
V
S
10µF
(1.8V @ 600mA)
R
1
*
R
2
*
124kΩ
100kΩ
VIN
VDD
LX
FB
RSI
EN
POR
PGND
SGND
R
4
100kΩ
R
5
100kΩ
100kΩ
R
6
EL7534
VO
V
O
R
3
100Ω
470pF
C
4
Data Sheet July 12, 2006
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
1-888-INTERSIL or 1-888-468-3774
| Intersil (and design) is a registered trademark of Intersil Americas Inc.
Copyright Intersil Americas Inc. 2004, 2005, 2006. All Rights Reserved
All other trademarks mentioned are the property of their respective owners.
2
FN7431.8
July 12, 2006
IMPORTANT NOTE: All parameters having Min/Max specifications are guaranteed. Typ values are for information purposes only. Unless otherwise noted, all tests are
at the specified temperature and are pulsed tests, therefore: T
J
= T
C
= T
A
Absolute Maximum Ratings (T
A
= 25°C)
V
IN
, V
DD
, POR to SGND. . . . . . . . . . . . . . . . . . . . . . -0.3V to +6.5V
LX to PGND . . . . . . . . . . . . . . . . . . . . . . . . . . -0.3V to (V
IN
+ +0.3V)
RSI, EN, V
O
, FB to SGND. . . . . . . . . . . . . . . -0.3V to (V
IN
+ +0.3V)
PGND to SGND . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.3V to +0.3V
Peak Output Current . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 800mA
Operating Ambient Temperature . . . . . . . . . . . . . . . .-40°C to +85°C
Storage Temperature. . . . . . . . . . . . . . . . . . . . . . . .-65°C to +150°C
Junction Temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . +125°C
CAUTION: Stresses above those listed in “Absolute Maximum Ratings” may cause permanent damage to the device. This is a stress only rating and operation of the
device at these or any other conditions above those indicated in the operational sections of this specification is not implied.
Electrical Specifications V
DD
= V
IN
= V
EN
= 3.3V, C1 = C2 = 10µF, L = 1.8µH, V
O
= 1.8V, unless otherwise specified.
PARAMETER DESCRIPTION CONDITIONS MIN TYP MAX UNIT
DC CHARACTERISTICS
V
FB
Feedback Input Voltage 790 800 810 mV
I
FB
Feedback Input Current 250 nA
V
IN
, V
DD
Input Voltage 2.5 5.5 V
V
IN,OFF
Minimum Voltage for Shutdown V
IN
falling 2 2.2 V
V
IN,ON
Maximum Voltage for Startup V
IN
rising 2.2 2.4 V
I
DD
Supply Current PWM, V
IN
= V
DD
= 5V 400 500 µA
EN = 0, V
IN
= V
DD
= 5V 0.1 1 µA
R
DS(ON)-PMOS
PMOS FET Resistance V
DD
= 5V, wafer test only 70 100 mΩ
R
DS(ON)-NMOS
NMOS FET Resistance V
DD
= 5V, wafer test only 45 75 mΩ
I
LMAX
Current Limit 1.5 A
T
OT,OFF
Over-temperature Threshold T rising 145 °C
T
OT,ON
Over-temperature Hysteresis T falling 130 °C
I
EN
, I
RSI
EN, RSI Current V
EN
, V
RSI
= 0V and 3.3V -1 1 µA
V
EN1
, V
RSI1
EN, RSI Rising Threshold V
DD
= 3.3V 2.4 V
V
EN2
, V
RSI2
EN, RSI Falling Threshold V
DD
= 3.3V 0.8 V
V
POR
Minimum V
FB
for POR, WRT Targeted
V
FB
Value
V
FB
rising 95 %
V
FB
falling 86 %
V
OLPOR
POR Voltage Drop I
SINK
= 5mA 35 70 mV
AC CHARACTERISTICS
F
PWM
PWM Switching Frequency 1.4 1.5 1.75 MHz
t
RSI
Minimum RSI Pulse Width Guaranteed by design 25 50 ns
t
SS
Soft-start Time 650 µs
t
POR
Power On Reset Delay Time 80 100 120 ms
EL7534
3
FN7431.8
July 12, 2006
Block Diagram
Pin Descriptions
PIN NUMBER PIN NAME PIN FUNCTION
1 SGND Negative supply for the controller stage
2 PGND Negative supply for the power stage
3 LX Inductor drive pin; high current digital output with average voltage equal to the regulator output voltage
4 VIN Positive supply for the power stage
5 VDD Power supply for the controller stage
6 RSI Resets POR timer
7 EN Enable
8 POR Power on reset open drain output
9 VO Output voltage sense
10 FB Voltage feedback input; connected to an external resistor divider between V
O
and SGND for variable
output
-
+
-
+
-
+
CONTROL
LOGIC
PWM
COMPEN-
SATION
UNDER-
VOLTAGE
LOCKOUT
POR
CLOCK
1.5MHz
SOFT-START
BANDGAP
REFERENCE
TEMPERATURE
SENSE
+
–
V
IN
LX
PGND
POR
V
O
FB
EN
V
DD
SGND
10pF
5M
124K
100K
10µF
2.5V-
3.5V
EN
PWM
COMPARATOR
N-DRIVER
P-DRIVER
CURRENT LIMIT
1.8µH
10µF
100K
PG
1.8V
600mA
RSI
RAMP
GENERATOR
100Ω
0.1µF
EL7534
P1-P3P4-P6P7-P9

EL7534IYZ

Mfr. #:
Buy EL7534IYZ
Manufacturer:
Renesas / Intersil
Description:
Switching Voltage Regulators EL7534IYZ MONOLITHIC 600MA STP-DWNG
Lifecycle:
New from this manufacturer.
Delivery:
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