ilc6383 Fairchild Semiconductor, ilc6383 Datasheet

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ilc6383

Manufacturer Part Number
ilc6383
Description
1-cell To 3-cell Boost Dc-dc Converter With True Load Disconnect, 3.3v, 5v Or Adjustable Output
Manufacturer
Fairchild Semiconductor
Datasheet

Available stocks

Company
Part Number
Manufacturer
Quantity
Price
Part Number:
ilc6383CIR33
Manufacturer:
FAIRCHILD
Quantity:
30 000
Part Number:
ilc6383CIR33X
Manufacturer:
CSI
Quantity:
69
Typical Applications
Features
• Guaranteed start up in PWM at 0.9V input
• Synchronous rectification requires no external diode
• True load disconnect from battery input in shutdown
• Up to 75mA at 3.3V and 40mA at 5V from 1V input
• Up to 375mA at 3.3V and 300mA at 5V from 3V input
• Peak efficiency > 90%
• 1µA battery input current in shutdown (with V
• Internal Oscillator frequency: 300kHz to ±15%
• ILC6383: Fixed 3.3V or 5V output
• ILC6383-ADJ: Adjustable output to 6V maximum
• Low battery detector with 100ms transient rejection delay
• Powergood output flag when V
Applications
• Cellular Phones, Pagers
• Palmtops, PDAs and portable electronics
• High efficiency 1V step up converters
ILC6383
1-Cell to 3-Cell Boost DC-DC Converter with True
Load Disconnect, 3.3V, 5V or Adjustable Output
ON
1 to 3-cell
V
IN
OFF
47µF
C
IN
+
R5
R6
15µH
PWM
L
Figure 1. ILC6383CIR-XX
PFM
1
2
3
4
LBI/SD
SEL
V
ILC6383-XX
IN
MSOP-8
L
X
V
GND
LBO
POK
OUT
OUT
8
7
6
5
is in regulation
Detector Output
Low Battery
Power Good Output
+
OUT
47µF
C
OUT
= 0V)
V
OUT
Description
The ILC6383 series of step-up DC-DC converters operate
from 1-cell to 3-cell input. They are direct replacement for
ILC6382, in applications where SYNC pin is not used. The
PFM or PWM operating mode is user selectable through
SEL pin connected to ground or left open, respectively. The
choice should be dependent upon the current to be delivered
to the load: PFM is recommended for input voltage higher
than 1.5V and loads below 100mA, while PWM is recom-
mended for more than 50mA load current and in noise sensi-
tive applications. In shutdown mode, the device allows true
load disconnect from battery input. Designed for wireless
communications applications, the oscillator frequency is set
at 300kHz with no harmonics at sub 20kHz audio band or at
455kHz IF band.
Internal synchronous rectification and externally selectable
PFM/PWM mode of operation allows the selection of the
best efficiency at light or full load. The ILC6383 is capable
of delivering 75mA at 3.3V output from a single cell input.
The ILC6383-XX offers 3.3V or 5V fixed output voltage
while the ILC6383-ADJ allows adjustable output voltage to
6V maximum. Output voltage accuracy is ±3.5% over full
operating temperature range.
Additional features include power good output (POK) and an
internal low battery detector with 100ms transient rejection
delay. The device will reject low battery input transients
under 100ms in duration. The ILC6383 series is available in
a space saving eight lead micro SOP (MSOP-8) package.
1 to 3-cell
ON
V
OFF
IN
47µF
C IN
+
R5
R6
15µH
L
PWM
Figure 2. ILC6383CIR-ADJ
PFM
1
2
3
4
SEL
LBI/SD
V
ILC6383-ADJ
IN
L
MSOP-8
X
www.fairchildsemi.com
GND
V
LBO
V
OUT
FB
8
7
6
5
V
OUT
REV. 1.2.6 6/13/02
= 1.25 (1+R1/R2)
+
C
47µF
OUT
R1
R2
V
OUT

Related parts for ilc6383

ilc6383 Summary of contents

Page 1

... IF band. Internal synchronous rectification and externally selectable PFM/PWM mode of operation allows the selection of the best efficiency at light or full load. The ILC6383 is capable of delivering 75mA at 3.3V output from a single cell input. The ILC6383-XX offers 3. fixed output voltage while the ILC6383-ADJ allows adjustable output voltage to 6V maximum. Output voltage accuracy is ± ...

Page 2

... POK MSOP MSOP (TOP VIEW) ILC6383CIR-ADJ Pin Description Inductor input . Inductor L connected between this pin and the battery Input Voltage . Connect directly to battery Low battery detect input and shutdown . Low battery detect threshold is set with this pin using a potential divider. If this pin is pulled to logic low then the device will shutdown ...

Page 3

... Load Regulation ∆ ∆ ∆ ∆ V OUT V OUT Efficiency η Electrical Characteristics ILC6383CIR-50 in PFM Mode Unless otherwise specified, all limits are at V BOLDFACE type indicates limit that apply over the full operating temperature range. (Note 2) Parameter Symbol Output Voltage V OUT(nom) ...

Page 4

... ILC6383 Electrical Characteristics ILC6383CIR-50 in PWM Mode Unless otherwise specified, all limits are at V BOLDFACE type indicates limit that apply over the full operating temperature range. (Note 2) Parameter Symbol Output Voltage V OUT Maximum Output I OUT Current Load Regulation ∆ ∆ ∆ ∆ V ...

Page 5

... OUT V < 0.4V LBI/SD OUT (short circuit) N-Channel MOSFET P-Channel MOSFET 1.175 1.150 Pins LB/SD, SEL and (Note 3) (Note 4) ). This feature eliminates false triggering due to HOLD(LBI) ILC6383 Min. Typ. Max. Units 0.9 V OUT(nominal) 1 +0. µA 400 mΩ 750 255 300 345 kHz 1 ...

Page 6

... Synchronous Rectification The ILC6383 also uses a technique called “synchronous rectification” which removes the need for the external diode used in other circuits. The diode is replaced with a second switch or in the case of the ILC6383, an FET as shown in Figure 4 below SW2 ...

Page 7

... Low Battery Detector The ILC6383's low battery detector is a based on a CMOS comparator. The negative input of the comparator is tied to an internal 1.25V (nominal) reference, V input is the LBI/SD pin. It uses a simple potential divider arrangement with two resistors to set the LBI threshold as shown in Figure 6 ...

Page 8

... When the ILC6383 is shut down, the synchronous rectifier disconnects the output from the input. This ensures that there is only leakage (I < 1µA typical) from the input to the out- IN put so that the battery is not drained when the ILC6383 is shut down LBI/SD ...

Page 9

... PRODUCT SPECIFICATION External Component Selection Inductors The ILC6383 is designed to work with a 15µH inductor in most applications. There are several vendors who supply standard surface mount inductors to this value. Suggested suppliers are shown in Table 1. Higher values of inductance will improve efficiency, but will reduce peak inductor current and consequently ripple and noise, but will also limit output current ...

Page 10

... ON 6 LBO OFF POK 5 SEL PWM PFM GND Manufacturer Fairchild Semiconductor muRata muRata Dale, Panasonic Dale, Panasonic Manufacturer Fairchild Semiconductor muRata muRata Dale, Panasonic PRODUCT SPECIFICATION U1 ILC6383ADJ OUT X C1 15µH 47µ GND 10K 6 3 LBO LBI ...

Page 11

... ILC6383 Typical Performance Characteristics ILC6383CIR-33 (V Unless otherwise specified 25° Efficiency (PWM Mode 0 1.5V IN 0.8 0.7 0 100 150 200 250 Load Current (mA) Load Regulation ( 3.42 3.4 3.38 3.36 3. 2.5V IN 3.32 3.3 3. 3.24 3.22 3.2 3. ...

Page 12

... ILC6383 Typical Performance Characteristics ILC6383CIR-50 (V Unless otherwise specified 25° Efficiency (PWM Mode) Load Regulation (PWM Mode 47µ 47µ 15µH. IN OUT PRODUCT SPECIFICATION = 5.0 V) OUT REV. 1.2.6 6/13/02 ...

Page 13

... PRODUCT SPECIFICATION Typical Performance Characteristics ILC6383CIR-50 (V Unless otherwise specified 25° REV. 1.2.6 6/13/02 = 47µ 47µ 15µH. IN OUT ILC6383 = 5.0V) (Continued) OUT 13 ...

Page 14

... ILC6383 Mechanical Dimensions 8-Lead MSOP 0.122 (3.1) 0.114 (2.9) Pin 1 identifier 0.006 (.15) 0.016 (.40) 0.004 (.05) 0.01 (.25) 14 0.122 (3.1) 0.244 (5.15) 0.114 (2.9) 0.228 (4.65) 0.025 (.65)BSC 0.009 (.23) 0.005 (.13) 0.043 (1.1) 0.031 (.80) 0.027 (.70) 0.016 (.40) PRODUCT SPECIFICATION (0-10)° REV. 1.2.6 6/13/02 ...

Page 15

... Part Number Output Voltage ILC6383CIR33X 3.3V ILC6383CIR50X 5.0V ILC6383CIRADJX Adjustable DISCLAIMER FAIRCHILD SEMICONDUCTOR RESERVES THE RIGHT TO MAKE CHANGES WITHOUT FURTHER NOTICE TO ANY PRODUCTS HEREIN TO IMPROVE RELIABILITY, FUNCTION OR DESIGN. FAIRCHILD DOES NOT ASSUME ANY LIABILITY ARISING OUT OF THE APPLICATION OR USE OF ANY PRODUCT OR CIRCUIT DESCRIBED HEREIN; ...

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