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PDF PE99153 Data sheet ( Hoja de datos )
| Número de pieza | PE99153 | |
| Descripción | Hi-Rel 6A DC-DC Converter | |
| Fabricantes | Peregrine Semiconductor | |
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Product Description
The PE99153 is a radiation tolerant point-of-load buck
regulator delivering high efficiency at VIN = 5V and output
currents up to 6A continuous. This single-chip solution is
perfect for Hi-Rel applications and delivers peak efficiency
exceeding 93%. A minimal external component count and
high switching frequency enables >10 W/in2 standard PCB
designs while high efficiency minimizes thermal concerns.
All power switching devices are integrated on-chip.
Fabricated in Peregrine’s patented UltraCMOS®
technology, the PE99153 offers excellent power efficiency
and intrinsic radiation tolerance.
Table 1. Radiation Performance
TID 100 kRad(Si)
SEL > 90 MeV•cm2/mg
SEB
> 90 MeV•cm2/mg
SET
> 90 MeV•cm2/mg
SEFI
> 90 MeV•cm2/mg
SEGR
> 90 MeV•cm2/mg
SEL, SEB, SEGR, SEU, SEFI: None observed, Au/60 degrees
SET: No events exceeding 30 mV transient observed @ Au,
LET=90, 60 degrees and normal incidence
Figure 1. Typical Application Diagram
Product Specification
PE99153
Hi-Rel 6A DC-DC Converter
Radiation Tolerant UltraCMOS®
Monolithic Point-of-Load Synchronous
Buck Regulator with Integrated Switches
Features
Up to 6A continuous
Output voltage range from 1.0–3.6V
by external select resistors
Input voltage range 4.6–6.0V
Current mode control, pulse-by-pulse
current limit, current sharing enabled
and (N+K) redundancy compatible
shutdown mode
SYNC function, 100 kHz–5 MHz lock
range with selectable 500 kHz / 1 MHz
free running frequency
Shutdown pin, Power Good output pin
for supply sequencing
Better than 1% typical initial accuracy
(+25 °C)
Control inputs compatible with TTL,
LVTTL, LVCMOS (2.5V and 3.3V) and
5V CMOS
Available in ceramic hermetic packaging
and in bare die form
Figure 2. Package Type
32-lead CQFP
Document No. DOC-29414-6 │ www.e2v-us.com
©2010–2015 Peregrine Semiconductor Corp. All rights reserved.
Page 1 of 15
1 page  
PE99153
Product Specification
Typical Performance Characteristics
Figure 4. Efficiency Curves Over Output
Load Current and Temperature
PE99153 Efficiency versus Output Current
VIN=5V, VOUT=2.5V, Fsw=1MHz
100
95
90
85
80
75
70
65 Tc = ‐55°C
TC = +25°C
60 Tc = +125°C
55
50
012345
Output Current (A)
6
Figure 5. Efficiency Curves Over Typical
Output Voltages
PE99153 Efficiency versus Output Current
Vin=5V, Fsw=1MHz, T=+25°C
100
95
90
85
80
75
70
65
60
55
50
0
Vout = 3.3V
Vout = 2.5V
Vout = 1.5V
Vout = 1.0V
1234
Output Current (A)
5
6
Thermal Derating Curve
The thermal derating curve plots the case temper-
ature against the maximum current allowed while
maintaining safe electrical operation below the
maximum junction temperature. Reliability guide-
lines require the continuous or average output
current to remain below 6A at 125 °C junction
temperature. At full load and 125 °C case temper-
ature, the die temperature will exceed 125 °C.
The output current should be derated starting at
114 °C case based on the specific application’s
worst-case time averaged current analysis using
Figure 6.
Figure 6. Thermal Derating Curve
ILOAD (max continuous / average) derating for Tcase
8
7
6
5
4
3
2
1
0
-50
-25
0 25 50 75
Case Temperature (oC)
100 125
The PE99153 meets the maximum allowable re-
quirement of MIL-PRF-38535 (<2 x 105 A / cm2) by
achieving a current density of <1.5 x 105 A / cm2.
Document No. DOC-29414-6 │ www.e2v-us.com
©2010–2015 Peregrine Semiconductor Corp. All rights reserved.
Page 5 of 15
5 Page 
PE99153
Product Specification
Efficiency Estimation and Improvement
The efficiency of a switch mode power supply can be
estimated by identifying and estimating all sources of loss
in the power supply system. These loss terms include
switching losses, resistive losses, losses incurred on chip
and losses associated with external passive components.
External passive losses occur primarily in the output
inductor, the output capacitor and the input capacitor.
Internal losses at high current are dominated by the high
and low side switch resistance. At low current, internal
losses are dominated by quiescent bias current and
switching related losses.
The PE99153 Design Guide provides a simple tool for
estimating loss. Losses are parameterized across input
voltage, output voltage and switching frequency to
provide accurate estimates of the performance of the part
under a variety of conditions.
The following sections give the mathematical expressions
of six main loss terms calculated in the design guide
spreadsheet.
Input Capacitor
The loss in the input capacitor can be calculated by using
the estimate of the RMS capacitor current calculated in
the input capacitor selection section. Given that:
IRMS-CIN = ILOAD (max) x √ [D x (1-D)]
Power lost in the input capacitor can be calculated as:
PLOSS-CIN = I2RMS-CIN x RCIN-ESR
Output Capacitor
The RMS current through the output capacitor in steady
state was calculated in the output capacitor selection
section as ∆IL/√ 3. Power loss in the output capacitor is
then calculated as:
PLOSS-COUT = (∆IL2/ 3) x RCOUT-ESR
Note that RCOUT-ESR is the ESR of the frequency range of
capacitors absorbing the ripple current.
Inductor
The inductor RMS current is given by:
ILRMS = I LOAD -∆IL/2 + ∆IL/√ 3
Power lost in the DC resistance of the inductor is then
given as:
PLOSS-LOUT-DCR = ILRMS2 x RLOUT-DCR
High Side Switch Loss
During the time the HSS is on, it is supporting the load
current plus the inductor ripple current. RMS current
through the HSS, when it is on, is given by:
IRMS-HSS = ILOAD -∆IL/2 + ∆IL/√3
PLOSS-HSS = IRMS-HSS2 x RON-HSS x D
Where the extra factor of D = VOUT/VIN is the duty ratio
and is included because power is only dissipated in the
HSS when it is on.
Low Side Switch Loss
During the time the LSS is on, it is supporting the load
current plus the inductor ripple current. RMS current
through the LSS, when it is on, is given by:
IRMS-LSS = ILOAD -∆IL/2 + ∆IL/√ 3
PLOSS-LSS = IRMS-LSS2 x RON-LSS x (1 -D)
Where the extra factor of 1 – (D = VOUT/VIN) is the duty
ratio of the LSS and is included because power is only
dissipated in the LSS when it is on.
Other Internal Loss
A complete list of internal losses in the PE99153 regulator
is estimated and available in the PE99153 design guide
spreadsheet available online. The internal losses are
parameterized across input voltage, output voltage and
switching frequency to provide accurate estimates of the
performance under a variety of conditions.
Setting the Current Limit
When the RSEL pin is grounded, the PE99153 uses an
internal current limiting resistor that will limit the output
current to a value of ILIMXINT listed in Table 2 of the
datasheet. See Figure 10 for a visual description of the
various current limits. The part can be programmed to
use an alternate current limit by tying the RSEL pin to
VIN. In this mode, the PE99153 can be programmed to
various output current limits through the selection of a
resistor connecting the RSET pin to ground.
Figure 10. PE99153 Current Limit
Absolute Max: Io
Operating Max: Imax
Max Current Limit:
ILIMXEXT or ILIMXINT
Current Threshold
IL ILOAD (average current)
Document No. DOC-29414-6 │ www.e2v-us.com
Time
©2010–2015 Peregrine Semiconductor Corp. All rights reserved.
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