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PDF ISL9305H Data sheet ( Hoja de datos )
| Número de pieza | ISL9305H | |
| Descripción | 3MHz Dual 1.5A Step-Down Converters and Dual Low-Input LDOs | |
| Fabricantes | Intersil Corporation | |
| Logotipo |  |
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3MHz Dual 1.5A
Low-Input LDOs
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ISL9305H
The ISL9305H is an integrated mini Power Management IC
(mini-PMIC) for powering low-voltage microprocessor, or
applications using a single Li-Ion or Li-Polymer cell battery to
power multiple voltage rails. ISL9305H integrates two
high-efficiency 3MHz synchronous step-down converters (DCD1
and DCD2) and two low-input, low-dropout linear regulators
(LDO1 and LDO2).
The 3MHz PWM switching frequency allows the use of very
small external inductors and capacitors. Both step-down
converters can enter skip mode under light load conditions to
further improve the efficiency and maximize the battery life.
For noise sensitive applications, they can also be programmed
through I2C interface to operate in forced PWM mode
regardless of the load current condition. The I2C interface
supports on-the-fly slew rate control of the output voltage from
0.825V to 3.6V at 25mV/step size for dynamic power saving.
Each step-down converter can supply up to 1.5A load current.
The default output voltage can be set from 0.8V to VIN using
external feedback resistors on the adjustable version, or the
ISL9305H can be ordered in factory pre-set power-up default
voltages in increments of 100mV from 0.9V to 3.6V.
The ISL9305H also provides two 300mA low dropout (LDO)
regulators. The input voltage range is 1.5V to 5.5V allowing them
to be powered from one of the on-chip step-down converters or
directly from the battery. The default LDO output comes with
factory pre-set fixed output voltage options between 0.9V to 3.3V.
The ISL9305H is available in a 4mmx4mm 16 Ld TQFN
package.
Related Literature
• FN7605, ISL9305 Data Sheet
• AN1564 “ISL9305IRTZEVAL1Z and ISL9305HIRTZEVAL1Z
Evaluation Boards”
Features
• Dual 1.5A, Synchronous Step-down Converters and Dual
300mA, General-purpose LDOs
• Input Voltage Range
- DCD1/DCD2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2.5V to 5.5V
- LDO1/LDO2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.5V to 5.5V
• 400kb/s I2C-Bus Series Interface Transfers the Control Data
Between the Host Controller and the ISL9305H
• Adjustable Output Voltage
- DCD1/DCD2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.8V to VIN
- Fixed Output I2C Programmability
• At 25mV/Step . . . . . . . . . . . . . . . . . . . . . . . . . . 0.825V to 3.6V
• LDO1/LDO2 Output Voltage I2C Programmability
- At 50mV/Step . . . . . . . . . . . . . . . . . . . . . . . . . . 0.9V to 3.3V
• 50μA IQ (Typ) with DCD1/DCD2 in Skip Mode; 20μA IQ (Typ)
for Each Enabled LDO
• On-the-fly I2C Programming of DC/DC and LDO Output
Voltages
• DCD1/DCD2 I2C Programmable Skip Mode Under Light
Load or Forced Fixed Switching Frequency PWM Mode
• Small, Thin 4mmx4mm TQFN Packagewww.DataSheet.co.kr
Applications
• Cellular Phones, Smart Phones
• PDAs, Portable Media Players, Portable Instruments
• Single Li-Ion/Li-Polymer Battery-Powered Equipment
• DSP Core Power
October 5, 2011
FN7724.1
2.5V TO 5.5V
C10
10µF
1.5V TO 5.5V
1.5V TO 5.5V
C2
1µF
C3
1µF
VINDCD1
VINDCD2
PG
SW1
FB1
SDAT
SCLK
VINLDO1
ISL9305H
SW2
FB2
VINLDO2
VOLDO1
VOLDO2
GNDDCD1 GNDDCD2 GNDLDO
L1 = 1.5µH
R1
L2 = 1.5µH
R3
C6
1µF
1.5A
*
R2
C4
10µF
1.5A
*
R4
C5
10µF
300mA
300mA
C7
1µF
*ONLY FOR ADJUSTABLE OUTPUT VERSION. FOR FIXED OUTPUT VERSION, DIRECTLY
CONNECT THE FB PIN TO THE OUTPUT OF THE BUCK CONVERTER.
FIGURE 1. TYPICAL APPLICATION DIAGRAM
1 CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
1-888-INTERSIL or 1-888-468-3774 |Copyright Intersil Americas Inc. 2010, 2011. All Rights Reserved
Intersil (and design) is a trademark owned by Intersil Corporation or one of its subsidiaries.
All other trademarks mentioned are the property of their respective owners.
Datasheet pdf - http://www.DataSheet4U.net/
1 page  
ISL9305H
Absolute Maximum Ratings (Refer to ground)
SW1, SW2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -1.5V to 6.5V
FB1, FB2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.3V to 3.6V
GNDDCD1, GNDDCD2, GNDLDO. . . . . . . . . . . . . . . . . . . . . . . . -0.3V to 0.3V
All other pins . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.3V to 6.5V
ESD Ratings
Human Body Model (Tested per JESD22-A114F) . . . . . . . . . . . . . . .3.5kV
Machine Model (Tested per JESD22-A115-A) . . . . . . . . . . . . . . . . . 2.2kV
Charged Device Model (Tested per JESD22-C101D) . . . . . . . . . . . 225V
Latch Up (Tested per JESD78B, Class II, Level A) . . . . . . . . . . . . . . . 100mA
Thermal Information
Thermal Resistance (Typical)
θJA (°C/W) θJC (°C/W)
16 Ld TQFN Package (Notes 4, 5) . . . . . . . 40.2
5
Maximum Junction Temperature Range . . . . . . . . . . . . . .-40°C to +150°C
Recommended Junction Temperature Range . . . . . . . . .-40°C to +125°C
Storage Temperature Range. . . . . . . . . . . . . . . . . . . . . . . .-40°C to +150°C
Pb-free reflow profile . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . see link below
http://www.intersil.com/pbfree/Pb-FreeReflow.asp
Recommended Operating Conditions
VINDCD1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2.5V to 5.5V
VINDCD2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2.5V to VINDCD1
VINLDO1 and VINLDO2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.5V to VINDCD1
DCD1 and DCD2 Output Current . . . . . . . . . . . . . . . . . . . . . . . . . 0A to 1.5A
LDO1 and LDO2 Output Current . . . . . . . . . . . . . . . . . . . . . . 0mA to 300mA
Operating Ambient Temperature . . . . . . . . . . . . . . . . . . . . . -40°C to +85°C
CAUTION: Do not operate at or near the maximum ratings listed for extended periods of time. Exposure to such conditions may adversely impact product
reliability and result in failures not covered by warranty.
NOTES:
4. θJA is measured in free air with the component mounted on a high effective thermal conductivity test board with “direct attach” features. See Tech
Brief TB379.
5. θJC, “case temperature” location is at the center of the exposed metal pad on the package underside.
Electrical Specifications Unless otherwise noted, all parameter limits are guaranteed over the recommended operating conditions
and the typical specifications are measured at the following conditions: TA = +25°C, VINDCD1 = 3.6V, VINDCD2 = 3.3V. For LDO1 and LDO2,
VINLDOx = VOLDOx + 0.5V to 5.5V with VINLDOx always no higher than VINDCD1, L1 = L2 = 1.5µH, C1 = 10µF, C4 = C5 = 10µF, C2 = C3 = C6 = C7 =
1µF, IOUT = 0A for DCD1, DCD2, LDO1 and LDO2 (see “TYPICAL APPLICATION DIAGRAM” on page 1 for more details). Boldface limits apply over the
operating temperature range, -40°C to +85°C.
PARAMETER
VINDCD1, VINDCD2 Voltage Range
SYMBOL
TEST CONDITIONS
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MIN MAX
(Note 6) TYP (Note 6) UNIT
2.5 - 5.5 V
VINDCD1, VINDCD2 Undervoltage
Lockout Threshold
VUVLO
Rising
Falling
- 2.2 2.3
1.9 2.1
-
V
V
Quiescent Supply Current on VINDCD1
IVIN1
IVIN2
Only DCD1 enabled, no load and no switching on DCD1
Only DCD1 and LDO1 enabled, with no load and no
switching on DCD1
-
40 60
µA
-
60 95
µA
IVIN3
Both DCD1 and DCD2 enabled, no load and no switching
on both DCD1 and DCD2
-
50 75
µA
IVIN4 Only LDO1 and LDO2 enabled
-
75 100
µA
IVIN5 DCD1, DCD2, LDO1 and LDO2 are enabled, with no load
-
100 130
µA
and no switching on both DCD1 and DCD2
Shutdown Supply Current
IVIN6
ISD
Only one DCD in forced PWM mode, no load
VINDCD1 = 5.5V, DCD1, DCD2, LDO1 and LDO2 are
disabled through I2C interface, VINDCD1 = 4.2V
- 4 7.5 mA
-
0.15
5
µA
Thermal Shutdown
- 155 -
°C
Thermal Shutdown Hysteresis
- 30 -
°C
DCD1 AND DCD2
FB1, FB2 Regulation Voltage
FB1, FB2 Bias Current
Output Voltage Accuracy
VFB
IFB FB = 0.75V
VIN = VO + 0.5V to 5.5V (minimal 2.5V), 1mA load
0.785 0.8 0.815
- 0.001 -
-3 - +3
V
µA
%
5 FN7724.1
October 5, 2011
Datasheet pdf - http://www.DataSheet4U.net/
5 Page 
ISL9305H
LDO1 AND LDO2 OUTPUT VOLTAGE CONTROL
REGISTERS
LDO1OUT, address 0x02h and LDO2OUT, address 0x03h.
TABLE 4. LDOX OUTPUT VOLTAGE CONTROL REGISTERS
BIT NAME
ACCESS RESET
DESCRIPTION
B7 Reserve
B6 Reserve
B5 LDOxOUT-5
-
-
R/W
0 Refer to Table 5 for
0
output voltage
settings
0
B4 LDOxOUT-4
R/W
0
B3 LDOxOUT-3
R/W
1
B2 LDOxOUT-2
R/W
1
B1 LDOxOUT-1
R/W
0
B0 LDOxOUT-0
R/W
0
LDOOUT
<7:0>
00
01
02
03
04
05
06
07
08
09
0A
0B
0C
0D
0E
0F
LDO OUTPUT
VOLTAGE (V)
0.9
0.95
1.00
1.05
1.1
1.15
1.20
1.25
1.30
1.35
1.40
1.45
1.50
1.55
1.60
1.65
TABLE 5. LDOX OUTPUT VOLTAGE SETTINGS
LDOOUT
<7:0>
LDO OUTPUT
VOLTAGE (V)
LDOOUT
<7:0>
LDO OUTPUT
VOLTAGE (V)
10 1.70 20 2.50
11 1.75 21 2.55
12 1.80 22 2.60
13 1.85 23 2.65
14 1.90 24 2.70
15 1.95 25 2.75
16 2.00 26 2.80
17 2.05 27 2.85
18
2.10
www.DataSheet.co.kr
28
2.90
19 2.15 29 2.95
1A 2.20 2A 3.00
1B 2.25 2B 3.05
1C 2.30 2C 3.10
1D 2.35 2D 3.15
1E 2.40 2E 3.20
1F 2.45 2F 3.25
LDOOUT
<7:0>
30
31
32
33
34
35
36
LDO OUTPUT
VOLTAGE (V)
3.30
3.35
3.40
3.45
3.50
3.55
3.60
11
FN7724.1
October 5, 2011
Datasheet pdf - http://www.DataSheet4U.net/
11 Page | ||
| Páginas | Total 17 Páginas | |
| PDF Descargar | [ Datasheet ISL9305H.PDF ] | |
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