SC632 PDF даташит
Спецификация SC632 изготовлена «Semtech» и имеет функцию, называемую «Fixed 5.0V Output Charge Pump Regulator». |
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Детали детали
Номер произв | SC632 |
Описание | Fixed 5.0V Output Charge Pump Regulator |
Производители | Semtech |
логотип |
14 Pages
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SC632
Fixed 5.0V Output
Charge Pump Regulator
POWER MANAGEMENT
Features
Description
Input voltage range — 2.9V to 5.5V
V tolerance — 5.0V ±3%
OUT
Continuous output current — 275mA
Peak output current — 500mA
Three charge pump modes — 1x, 1.5x and 2x
Output ripple ≤ 30mV for I ≤ 400mA
PP OUT
Short circuit, over-voltage, and over-temperature
protection
Soft-start functionality
Shutdown current — 0.1μA, typical
Ultra thin package — 2 x 2 x 0.6 (mm)
Fully WEEE and RoHS compliant
Applications
Mobile phones
MP3 players
USB On-The-Go
Multi-LED backlit LCDs
Compact flash/CF+ products
PMPs
Digital video cameras
Digital still cameras
PDAs
The SC632 is a high-current voltage regulator using
Semtech’s proprietary low-noise charge pump technol-
ogy. Performance is optimized for use in single Li-Ion
battery cell applications. The regulator provides the per-
formance of a linear, low drop-out (LDO) voltage regulator
when the input is greater than 5.0V. Unlike an LDO, drop-
out is avoided when the input is less than 5.0V. Instead, a
charge pump is activated to provide voltage boost and
the head-room needed for voltage regulation.
Only two 2.2μF bucket capacitors are required to deliver
the full output current. The charge pump provides a low
EMI solution compared to inductive boost regulators.
The SC632’s charge pump has three modes of operation:
2x, 1.5x, and 1x modes. The 2x and 1.5x modes deliver
current to the load in each of two phases. The 1x mode
turns off the charge pump, delivering current through an
LDO. When active, the charge pump provides low-ripple
operationhttp://www.DataSheet4U.net/ at 200kHz, which is typically less than 30mVpp
at the output. The SC632 is capable of delivering 275mA
continuous current, with peak current to 500mA. A 22μF
output capacitor is used for decoupling the load and for
smoothing mode transitions. Hysteresis is provided to
prevent chatter between charge pump modes.
The micro lead-frame package is both small and thermally
efficient, measuring 2 x 2 x 0.6 (mm).
Typical Application Circuit
VBAT
CIN
22μF
IN
OUT
VOUT = 5.0V @ 275mA
COUT
22μF
SC632
Chip
enable
EN
GND
C1+
C1-
C2+
C2-
C1
2.2μF
C2
2.2μF
June 19, 2008
© 2008 Semtech Corporation
Patents Pending
1
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SC632
Pin Configuration
GND
1
C1+ 2
C1- 3
IN 4
TOP VIEW
T
8 C2-
7 C2+
6 OUT
5 EN
Ordering Information
Device
Package
SC632ULTRT(1)(2)
MLPD-UT-8 2x2
SC632EVB
Evaluation Board
Notes:
(1) Available in tape and reel only. A reel contains 3,000 devices.
(2) Lead-free package only. Device is WEEE and RoHS compliant.
MLPD-UT-8; 2x2, 8 LEAD
θ = 68°C/W
JA
Marking Information
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632
yw
yw = Datecode
2
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SC632
Absolute Maximum Ratings
Recommended Operating Conditions
IN (V) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.3 to +6.0
OUT (V). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.3 to +6.0
C1+, C2+ (V) . . . . . . . . . . . . . . . . . . . . . . . . . -0.3 to (VOUT + 0.3)
Pin Voltage — All Other Pins (V) . . . . . . . . . -0.3 to (VIN + 0.3)
OUT pin — Short Circuit Duration . . . . . . . . . . Continuous
ESD Protection Level(2) (kV) . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Ambient Temperature Range (°C) . . . . . . . . -40 ≤ TA ≤ +85
IN (V) ... . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2.9 ≤ VIN ≤ 5.5
Thermal Information
Thermal Resistance, Junction to Ambient(1) (°C/W) . . . . 68
Maximum Junction Temperature (°C) . . . . . . . . . . . . . . +150
Storage Temperature Range (°C) . . . . . . . . . . . . -65 to +150
Peak IR Reflow Temperature (10s to 30s) (°C) . . . . . . . +260
Exceeding the above specifications may result in permanent damage to the device or device malfunction. Operation outside of the parameters
specified in the Electrical Characteristics section is not recommended.
NOTES
(1) Calculated from package in still air, mounted to 3 x 4.5 (in), 4 layer FR4 PCB with thermal vias under the exposed pad per JESD51 standards.
(2) Tested according to JEDEC standard JESD22-A114-B.
Electrical Characteristics
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Unless otherwise specified: T = +25°C for Typ, -40°C to +85°C for Min and Max; C = C = 2.2μF (ESR < 0.03Ω); C = C = 22μF; V = 2.9V to 5.5V
A
12
IN OUT
IN
Parameter
Symbol
Condition
Min Typ Max Units
Output Voltage
Output Voltage Ripple
V
OUT
V
PP
Maximum Output Current
I
OUT
Shutdown Current
Total Quiescent Current
Charge Pump Frequency
Start-Up Time
Line Regulation
Load Regulation
ISD
IQ
f
PUMP
t
SU
ΔV
LINE
ΔV
LOAD
V = 4.2V, I = 1mA
IN OUT
I ≤ 400mA
OUT
Peak Load - thermally limited(1),
T <150°C, 3.3V ≤ V ≤ 5.5V
J IN
Continuous Load,
T ≤ 55°C, 3.15V ≤ V ≤ 4.2V
A IN
Continuous Load,
3.10V ≤ V ≤ 4.2V
IN
Shutdown (EN = GND), VIN = 3.6V
EN high, IOUT = 1mA
V = 3.2V
IN
(EN transitions from low to high),
4.85V ≤ V ≤ 5.15V, No load
OUT
I = 1mA, 2.85V ≤ V ≤ 4.2V
OUT IN
V =4.2V, 1mA ≤ I ≤ 400mA
IN OUT
4.85 5.0 5.15
30
500
V
mV
mA
400 mA
275
0.1 2
1.5 2.5
140 200 260
400
21
37.5
mA
μA
mA
kHz
μs
mV
mV
3
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